-
Notifications
You must be signed in to change notification settings - Fork 3k
/
electrum
executable file
·713 lines (613 loc) · 25.1 KB
/
electrum
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2011 thomasv@gitorious
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys, base64, os, re, hashlib, socket, getpass, copy, operator, urllib2, ast
try:
import ecdsa
except:
print "python-ecdsa does not seem to be installed. Try 'sudo easy_install ecdsa'"
exit(1)
try:
import Crypto
has_encryption = True
except:
has_encryption = False
############ functions from pywallet #####################
addrtype = 0
def hash_160(public_key):
md = hashlib.new('ripemd160')
md.update(hashlib.sha256(public_key).digest())
return md.digest()
def public_key_to_bc_address(public_key):
h160 = hash_160(public_key)
return hash_160_to_bc_address(h160)
def hash_160_to_bc_address(h160):
vh160 = chr(addrtype) + h160
h = Hash(vh160)
addr = vh160 + h[0:4]
return b58encode(addr)
def bc_address_to_hash_160(addr):
bytes = b58decode(addr, 25)
return bytes[1:21]
__b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
__b58base = len(__b58chars)
def b58encode(v):
""" encode v, which is a string of bytes, to base58.
"""
long_value = 0L
for (i, c) in enumerate(v[::-1]):
long_value += (256**i) * ord(c)
result = ''
while long_value >= __b58base:
div, mod = divmod(long_value, __b58base)
result = __b58chars[mod] + result
long_value = div
result = __b58chars[long_value] + result
# Bitcoin does a little leading-zero-compression:
# leading 0-bytes in the input become leading-1s
nPad = 0
for c in v:
if c == '\0': nPad += 1
else: break
return (__b58chars[0]*nPad) + result
def b58decode(v, length):
""" decode v into a string of len bytes
"""
long_value = 0L
for (i, c) in enumerate(v[::-1]):
long_value += __b58chars.find(c) * (__b58base**i)
result = ''
while long_value >= 256:
div, mod = divmod(long_value, 256)
result = chr(mod) + result
long_value = div
result = chr(long_value) + result
nPad = 0
for c in v:
if c == __b58chars[0]: nPad += 1
else: break
result = chr(0)*nPad + result
if length is not None and len(result) != length:
return None
return result
def Hash(data):
return hashlib.sha256(hashlib.sha256(data).digest()).digest()
def EncodeBase58Check(vchIn):
hash = Hash(vchIn)
return b58encode(vchIn + hash[0:4])
def DecodeBase58Check(psz):
vchRet = b58decode(psz, None)
key = vchRet[0:-4]
csum = vchRet[-4:]
hash = Hash(key)
cs32 = hash[0:4]
if cs32 != csum:
return None
else:
return key
def PrivKeyToSecret(privkey):
return privkey[9:9+32]
def SecretToASecret(secret):
vchIn = chr(addrtype+128) + secret
return EncodeBase58Check(vchIn)
def ASecretToSecret(key):
vch = DecodeBase58Check(key)
if vch and vch[0] == chr(addrtype+128):
return vch[1:]
else:
return False
########### end pywallet functions #######################
def int_to_hex(i, length=1):
s = hex(i)[2:]
s = "0"*(2*length - len(s)) + s
return s.decode('hex')[::-1].encode('hex')
# password encryption
from Crypto.Cipher import AES
BLOCK_SIZE = 32
PADDING = '{'
pad = lambda s: s + (BLOCK_SIZE - len(s) % BLOCK_SIZE) * PADDING
EncodeAES = lambda c, s: base64.b64encode(c.encrypt(pad(s)))
DecodeAES = lambda c, e: c.decrypt(base64.b64decode(e)).rstrip(PADDING)
# secp256k1, http://www.oid-info.com/get/1.3.132.0.10
_p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
_r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
_b = 0x0000000000000000000000000000000000000000000000000000000000000007L
_a = 0x0000000000000000000000000000000000000000000000000000000000000000L
_Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
_Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
oid_secp256k1 = (1,3,132,0,10)
SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
no_wallet_message = "Wallet file not found.\nPlease provide a passphrase and a password. The passphrase will be used as a seed to generate Bitcoin addresses. It should be long and random, and nobody should be able to guess it. Memorize it, or write it down and keep it in a vault. The password will be used to encrypt your local wallet file. You will need to enter your password everytime you use your wallet. If you lose your password, you can still recover your wallet with the passphrase."
def filter(s):
out = re.sub('( [^\n]*|)\n','',s)
out = out.replace(' ','')
out = out.replace('\n','')
return out
def raw_tx( inputs, outputs, for_sig = None ):
s = int_to_hex(1,4) + ' version\n'
s += int_to_hex( len(inputs) ) + ' number of inputs\n'
for i in range(len(inputs)):
_, _, p_hash, p_index, p_script, pubkey, sig = inputs[i]
s += p_hash.decode('hex')[::-1].encode('hex') + ' prev hash\n'
s += int_to_hex(p_index,4) + ' prev index\n'
if for_sig is None:
sig = sig + chr(1) # hashtype
script = int_to_hex( len(sig)) + ' push %d bytes\n'%len(sig)
script += sig.encode('hex') + ' sig\n'
pubkey = chr(4) + pubkey
script += int_to_hex( len(pubkey)) + ' push %d bytes\n'%len(pubkey)
script += pubkey.encode('hex') + ' pubkey\n'
elif for_sig==i:
script = p_script + ' scriptsig \n'
else:
script=''
s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
s += script
s += "ffffffff" + ' sequence\n'
s += int_to_hex( len(outputs) ) + ' number of outputs\n'
for output in outputs:
addr, amount = output
s += int_to_hex( amount, 8) + ' amount: %d\n'%amount
script = '76a9' # op_dup, op_hash_160
script += '14' # push 0x14 bytes
script += bc_address_to_hash_160(addr).encode('hex')
script += '88ac' # op_equalverify, op_checksig
s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
s += script + ' script \n'
s += int_to_hex(0,4) # lock time
if for_sig is not None: s += int_to_hex(1, 4) # hash type
return s
class InvalidPassword(Exception):
pass
wallet_path = os.environ["HOME"] + '/.bitcoin/electrum.dat'
class Wallet:
def __init__(self):
self.gap_limit = 5 # configuration
self.host = 'ecdsa.org'
self.port = 50000
self.fee = 0.005
# saved fields
self.use_encryption = False
self.addresses = []
self.passphrase = '' # encrypted
self.private_keys = repr([]) # encrypted
self.change_addresses = [] # index of addresses used as change
self.status = {} # current status of addresses
self.history = {}
self.labels = {} # labels for addresses and transactions
self.addressbook = [] # outgoing addresses, for payments
self.blocks = 0
# not saved
self.message = ''
self.tx_history = {}
def is_mine(self, address):
return address in self.addresses
def is_change(self, address):
if not self.is_mine(address):
return False
k = self.addresses.index(address)
return k in self.change_addresses
def is_valid(self,addr):
ADDRESS_RE = re.compile('[1-9A-HJ-NP-Za-km-z]{26,}\\Z')
return ADDRESS_RE.match(addr)
def create_new_address(self, for_change, password):
passphrase = self.pw_decode( self.passphrase, password)
i = len( self.addresses ) - len(self.change_addresses) if not for_change else len(self.change_addresses)
seed = Hash( "%d:%d:"%(i,for_change) + passphrase )
order = generator_secp256k1.order()
secexp = ecdsa.util.randrange_from_seed__trytryagain( seed, order )
secret = SecretToASecret( ('%064x' % secexp).decode('hex') )
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
public_key = private_key.get_verifying_key()
address = public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() )
try:
private_keys = ast.literal_eval( self.pw_decode( self.private_keys, password) )
private_keys.append(secret)
except:
raise InvalidPassword("")
self.private_keys = self.pw_encode( repr(private_keys), password)
self.addresses.append(address)
if for_change: self.change_addresses.append( i )
h = self.retrieve_history(address)
self.history[address] = h
self.status[address] = h[-1]['blk_hash'] if h else None
return address
def recover(self, password):
passphrase = self.pw_decode( self.passphrase, password)
# todo: recover receiving addresses from tx
num_gap = 0
while True:
addr = self.create_new_address(True, password)
print "recovering", addr
if self.status[addr] is None: break
num_gap = 0
while True:
addr = self.create_new_address(False, password)
print "recovering", addr
if self.status[addr] is None:
num_gap += 1
if num_gap == self.gap_limit: break
else:
num_gap = 0
# remove limit-1 addresses. [ this is ok, because change addresses are at the beginning of the list]
n = self.gap_limit
self.addresses = self.addresses[:-n]
self.keys = self.private_keys[:-n]
# history and addressbook
self.update_tx_history()
for tx in self.tx_history.values():
if tx['value']<0:
for i in tx['outputs']:
if not self.is_mine(i) and i not in self.addressbook:
self.addressbook.append(i)
# redo labels
self.update_tx_labels()
def save(self):
s = repr( (self.use_encryption, self.fee, self.host, self.blocks,
self.passphrase, self.addresses, self.private_keys,
self.change_addresses, self.status, self.history,
self.labels, self.addressbook) )
f = open(wallet_path,"w")
f.write(s)
f.close()
def read(self):
try:
f = open(wallet_path,"r")
data = f.read()
f.close()
except:
return False
try:
(self.use_encryption, self.fee, self.host, self.blocks,
self.passphrase, self.addresses, self.private_keys,
self.change_addresses, self.status, self.history,
self.labels, self.addressbook) = ast.literal_eval( data )
except:
return False
self.update_tx_history()
return True
def get_new_address(self, password):
n = 0
for addr in self.addresses[-self.gap_limit:]:
if self.history[addr] == []:
n = n + 1
if n < self.gap_limit:
try:
new_address = self.create_new_address(False, password)
except InvalidPassword:
return False, "wrong password"
self.save()
return True, new_address
else:
return False, "The last %d addresses in your list have never been used. You should use them first, or increase the allowed gap size in your preferences. "%self.gap_limit
def get_addr_balance(self, addr):
h = self.history.get(addr)
c = u = 0
for item in h:
v = item['value']
if item['height']:
c += v
else:
u += v
return c, u
def get_balance(self):
conf = unconf = 0
for addr in self.addresses:
c, u = self.get_addr_balance(addr)
conf += c
unconf += u
return conf, unconf
def request(self, request ):
if self.port == 80:
try:
out = urllib2.urlopen('http://'+self.host+'/q/tw', request, timeout=5).read()
except:
out = ''
else:
s = socket.socket( socket.AF_INET, socket.SOCK_STREAM)
s.connect(( self.host, self.port))
s.send(request)
out = ''
while 1:
msg = s.recv(1024)
if msg: out += msg
else: break
s.close()
if re.match('[^:]\s*\(', out): out = ''
return out
def retrieve_message(self):
if not self.message:
self.message = self.request( repr ( ('msg', '')))
def send_tx(self, data):
return self.request( repr ( ('tx', data )))
def retrieve_history(self, address):
return ast.literal_eval( self.request( repr ( ('h', address ))) )
def poll(self):
return ast.literal_eval( self.request( repr ( ('poll', '' ))))
def new_session(self):
self.message = self.request( repr ( ('watch', repr(self.addresses) )))
def update(self):
blocks, changed_addresses = self.poll()
self.blocks = blocks
for addr, blk_hash in changed_addresses.items():
if self.status[addr] != blk_hash:
print "updating history for", addr
self.history[addr] = self.retrieve_history(addr)
self.status[addr] = blk_hash
self.update_tx_history()
if changed_addresses:
return True
else:
return False
def choose_inputs_outputs( self, to_addr, amount, fee, password):
""" todo: minimize tx size """
amount = int( 1e8*amount )
fee = int( 1e8*fee )
total = 0
inputs = []
for addr in self.addresses:
h = self.history.get(addr)
for item in h:
if item.get('raw_scriptPubKey'):
v = item.get('value')
total += v
inputs.append((addr, v, item['tx_hash'], item['pos'], item['raw_scriptPubKey'], None, None) )
if total >= amount + fee: break
if total >= amount + fee: break
else:
print "not enough funds: %d %d"%(total, fee)
return False, "not enough funds: %d %d"%(total, fee)
outputs = [ (to_addr, amount) ]
change_amount = total - ( amount + fee )
if change_amount != 0:
# first look for unused change addresses
for addr in self.addresses:
i = self.addresses.index(addr)
if i not in self.change_addresses: continue
if self.history.get(addr): continue
change_address = addr
break
else:
change_address = self.create_new_address(True, password)
print "new change address", change_address
outputs.append( (change_address, change_amount) )
return inputs, outputs
def sign_inputs( self, inputs, outputs, password ):
s_inputs = []
for i in range(len(inputs)):
addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i]
private_key = self.get_private_key(addr, password)
public_key = private_key.get_verifying_key()
pubkey = public_key.to_string()
tx = filter( raw_tx( inputs, outputs, for_sig = i ) )
sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) )
return s_inputs
def pw_encode(self, s, password):
if password:
secret = Hash(password)
cipher = AES.new(secret)
return EncodeAES(cipher, s)
else:
return s
def pw_decode(self, s, password):
if password:
secret = Hash(password)
cipher = AES.new(secret)
return DecodeAES(cipher, s)
else:
return s
def get_private_key( self, addr, password ):
try:
private_keys = ast.literal_eval( self.pw_decode( self.private_keys, password ) )
except:
raise InvalidPassword("")
k = self.addresses.index(addr)
secret = private_keys[k]
b = ASecretToSecret(secret)
secexp = int( b.encode('hex'), 16)
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve=SECP256k1 )
public_key = private_key.get_verifying_key()
assert addr == public_key_to_bc_address( chr(4) + public_key.to_string() )
return private_key
def get_tx_history(self):
lines = self.tx_history.values()
lines = sorted(lines, key=operator.itemgetter("nTime"))
return lines
def update_tx_history(self):
self.tx_history= {}
for addr in self.addresses:
for tx in self.history[addr]:
tx_hash = tx['tx_hash']
line = self.tx_history.get(tx_hash)
if not line:
self.tx_history[tx_hash] = copy.copy(tx)
line = self.tx_history.get(tx_hash)
else:
line['value'] += tx['value']
if line['blk_hash'] == 'mempool':
line['nTime'] = 1e12
self.update_tx_labels()
def update_tx_labels(self):
for tx in self.tx_history.values():
default_label = ''
if tx['value']<0:
for o_addr in tx['outputs']:
if not self.is_change(o_addr):
dest_label = self.labels.get(o_addr)
if dest_label:
default_label = 'to: ' + dest_label
else:
default_label = 'to: ' + o_addr
else:
for o_addr in tx['outputs']:
if self.is_mine(o_addr) and not self.is_change(o_addr):
dest_label = self.labels.get(o_addr)
if dest_label:
default_label = 'at: ' + dest_label
else:
default_label = 'at: ' + o_addr
tx['default_label'] = default_label
def send(self, to_address, amount, label, password):
try:
inputs, outputs = wallet.choose_inputs_outputs( to_address, amount, self.fee, password )
except InvalidPassword: return False, "Wrong password"
if not inputs: return False, "Not enough funds"
try:
s_inputs = wallet.sign_inputs( inputs, outputs, password )
except InvalidPassword:
return False, "Wrong password"
tx = raw_tx( s_inputs, outputs )
tx = filter( tx )
tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
out = self.send_tx(tx)
if out != tx_hash:
return False, "error: hash mismatch"
wallet.labels[tx_hash] = label
wallet.save()
return True, tx_hash
if __name__ == '__main__':
try:
cmd = sys.argv[1]
except:
cmd = "gui"
known_commands = ['balance', 'sendtoaddress', 'password', 'getnewaddress', 'addresses', 'history', 'label', 'gui', 'all_addresses']
if cmd not in known_commands:
print "Known commands:", ', '.join(known_commands)
exit(0)
wallet = Wallet()
if cmd=='gui':
import gui
gui.init_wallet(wallet)
gui = gui.BitcoinGUI(wallet)
gui.main()
exit(0)
if not wallet.read():
print no_wallet_message
passphrase = raw_input("Enter passphrase: ")
if len(passphrase)<20:
print "Passphrase too short. Please at least 20 characters"
exit(1)
if has_encryption:
password = getpass.getpass("Password (hit return if you do not wish to encrypt your wallet):")
if password:
password2 = getpass.getpass("Confirm password:")
if password != password2:
print "error"
exit(1)
else:
password = None
print "in order to use wallet encryption, please install pycrypto (sudo easy_install pycrypto)"
wallet.passphrase = wallet.pw_encode( passphrase, password)
print "server name and port number (default: ecdsa.org:50000)"
host = raw_input("server:")
if not host: host = 'ecdsa.org'
port = raw_input("port:")
if not port: port = 50000
else: port = int(port)
print "default fee for transactions (default 0.005)"
fee = raw_input("default fee:")
if not fee: fee = 0.005
wallet.fee = fee
wallet.gap_limit = 5
wallet.host = host
wallet.port = port
wallet.recover(password)
wallet.save()
wallet.new_session()
wallet.update()
wallet.save()
if cmd in ['sendtoaddress', 'password', 'getnewaddress']:
password = getpass.getpass('Password:') if wallet.use_encryption else None
if cmd == 'balance':
c, u = wallet.get_balance()
if u:
print c*1e-8, u*1e-8
else:
print c*1e-8
elif cmd in [ 'addresses', 'all_addresses']:
for addr in wallet.addresses:
if cmd == 'all_addresses' or not wallet.is_change(addr):
label = wallet.labels.get(addr) if not wallet.is_change(addr) else "[change]"
if label is None: label = ''
h = wallet.history.get(addr)
ni = no = 0
for item in h:
if item['is_in']: ni += 1
else: no += 1
print addr, no, ni, wallet.get_addr_balance(addr)[0]*1e-8, label
if cmd == 'history':
lines = wallet.get_tx_history()
b = 0
for line in lines:
import datetime
v = 1.*line['value']/1e8
b += v
v_str = "%f"%v if v<0 else "+%f"%v
try:
time_str = datetime.datetime.fromtimestamp( line['nTime'])
except:
print line['nTime']
time_str = 'pending'
label = line.get('label')
if not label: label = line['tx_hash']
else: label = label + ' '*(64 - len(label) )
print time_str, " ", label, " ", v_str, " ", "%f"%b
print "# balance: ", b
elif cmd == 'label':
try:
tx = sys.argv[2]
label = ' '.join(sys.argv[3:])
except:
print "syntax: label <tx_hash> <text>"
exit(1)
wallet.labels[tx] = label
wallet.save()
elif cmd == 'sendtoaddress':
try:
to_address = sys.argv[2]
amount = float(sys.argv[3])
label = ' '.join(sys.argv[4:])
except:
print "syntax: send <recipient> <amount> [label]"
exit(1)
r, h = wallet.send( to_address, amount, label, password )
print h
elif cmd == 'getnewaddress':
a = wallet.get_new_address()
if a:
print a
else:
print "Maximum gap reached. Increase gap in order to create more addresses."
elif cmd == 'password':
try:
passphrase = wallet.pw_decode( wallet.passphrase, password)
private_keys = ast.literal_eval( wallet.pw_decode( wallet.private_keys, password) )
except:
print "sorry"
exit(1)
new_password = getpass.getpass('New password:')
if new_password == getpass.getpass('Confirm new password:'):
wallet.use_encryption = (new_password != '')
wallet.passphrase = wallet.pw_encode( passphrase, new_password)
wallet.private_keys = wallet.pw_encode( repr( private_keys ), new_password)
wallet.save()
else:
print "error: mismatch"