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 hashlib, base64, ecdsa, re
21 from util import print_error
24 return s.decode('hex')[::-1].encode('hex')
26 def int_to_hex(i, length=1):
27 s = hex(i)[2:].rstrip('L')
28 s = "0"*(2*length - len(s)) + s
32 # https://en.bitcoin.it/wiki/Protocol_specification#Variable_length_integer
36 return "fd"+int_to_hex(i,2)
38 return "fe"+int_to_hex(i,4)
40 return "ff"+int_to_hex(i,8)
46 return '4c' + int_to_hex(i)
48 return '4d' + int_to_hex(i,2)
50 return '4e' + int_to_hex(i,4)
54 Hash = lambda x: hashlib.sha256(hashlib.sha256(x).digest()).digest()
55 hash_encode = lambda x: x[::-1].encode('hex')
56 hash_decode = lambda x: x.decode('hex')[::-1]
59 # pywallet openssl private key implementation
61 def i2d_ECPrivateKey(pkey, compressed=False):
63 key = '3081d30201010420' + \
64 '%064x' % pkey.secret + \
65 'a081a53081a2020101302c06072a8648ce3d0101022100' + \
67 '3006040100040107042102' + \
73 key = '308201130201010420' + \
74 '%064x' % pkey.secret + \
75 'a081a53081a2020101302c06072a8648ce3d0101022100' + \
77 '3006040100040107044104' + \
84 return key.decode('hex') + i2o_ECPublicKey(pkey.pubkey, compressed)
86 def i2o_ECPublicKey(pubkey, compressed=False):
87 # public keys are 65 bytes long (520 bits)
88 # 0x04 + 32-byte X-coordinate + 32-byte Y-coordinate
89 # 0x00 = point at infinity, 0x02 and 0x03 = compressed, 0x04 = uncompressed
90 # compressed keys: <sign> <x> where <sign> is 0x02 if y is even and 0x03 if y is odd
92 if pubkey.point.y() & 1:
93 key = '03' + '%064x' % pubkey.point.x()
95 key = '02' + '%064x' % pubkey.point.x()
98 '%064x' % pubkey.point.x() + \
99 '%064x' % pubkey.point.y()
101 return key.decode('hex')
103 # end pywallet openssl private key implementation
107 ############ functions from pywallet #####################
109 def hash_160(public_key):
111 md = hashlib.new('ripemd160')
112 md.update(hashlib.sha256(public_key).digest())
116 md = ripemd.new(hashlib.sha256(public_key).digest())
120 def public_key_to_bc_address(public_key):
121 h160 = hash_160(public_key)
122 return hash_160_to_bc_address(h160)
124 def hash_160_to_bc_address(h160, addrtype = 0):
125 vh160 = chr(addrtype) + h160
127 addr = vh160 + h[0:4]
128 return b58encode(addr)
130 def bc_address_to_hash_160(addr):
131 bytes = b58decode(addr, 25)
132 return ord(bytes[0]), bytes[1:21]
134 def encode_point(pubkey, compressed=False):
135 order = generator_secp256k1.order()
136 p = pubkey.pubkey.point
137 x_str = ecdsa.util.number_to_string(p.x(), order)
138 y_str = ecdsa.util.number_to_string(p.y(), order)
140 return chr(2 + (p.y() & 1)) + x_str
142 return chr(4) + pubkey.to_string() #x_str + y_str
144 __b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
145 __b58base = len(__b58chars)
148 """ encode v, which is a string of bytes, to base58."""
151 for (i, c) in enumerate(v[::-1]):
152 long_value += (256**i) * ord(c)
155 while long_value >= __b58base:
156 div, mod = divmod(long_value, __b58base)
157 result = __b58chars[mod] + result
159 result = __b58chars[long_value] + result
161 # Bitcoin does a little leading-zero-compression:
162 # leading 0-bytes in the input become leading-1s
165 if c == '\0': nPad += 1
168 return (__b58chars[0]*nPad) + result
170 def b58decode(v, length):
171 """ decode v into a string of len bytes."""
173 for (i, c) in enumerate(v[::-1]):
174 long_value += __b58chars.find(c) * (__b58base**i)
177 while long_value >= 256:
178 div, mod = divmod(long_value, 256)
179 result = chr(mod) + result
181 result = chr(long_value) + result
185 if c == __b58chars[0]: nPad += 1
188 result = chr(0)*nPad + result
189 if length is not None and len(result) != length:
195 def EncodeBase58Check(vchIn):
197 return b58encode(vchIn + hash[0:4])
199 def DecodeBase58Check(psz):
200 vchRet = b58decode(psz, None)
210 def PrivKeyToSecret(privkey):
211 return privkey[9:9+32]
213 def SecretToASecret(secret, compressed=False, addrtype=0):
214 vchIn = chr((addrtype+128)&255) + secret
215 if compressed: vchIn += '\01'
216 return EncodeBase58Check(vchIn)
218 def ASecretToSecret(key, addrtype=0):
219 vch = DecodeBase58Check(key)
220 if vch and vch[0] == chr((addrtype+128)&255):
225 def regenerate_key(sec):
226 b = ASecretToSecret(sec)
230 secret = int('0x' + b.encode('hex'), 16)
231 return EC_KEY(secret)
233 def GetPubKey(pubkey, compressed=False):
234 return i2o_ECPublicKey(pubkey, compressed)
236 def GetPrivKey(pkey, compressed=False):
237 return i2d_ECPrivateKey(pkey, compressed)
240 return ('%064x' % pkey.secret).decode('hex')
242 def is_compressed(sec):
243 b = ASecretToSecret(sec)
247 def address_from_private_key(sec):
248 # rebuild public key from private key, compressed or uncompressed
249 pkey = regenerate_key(sec)
252 # figure out if private key is compressed
253 compressed = is_compressed(sec)
255 # rebuild private and public key from regenerated secret
256 private_key = GetPrivKey(pkey, compressed)
257 public_key = GetPubKey(pkey.pubkey, compressed)
258 address = public_key_to_bc_address(public_key)
263 ADDRESS_RE = re.compile('[1-9A-HJ-NP-Za-km-z]{26,}\\Z')
264 if not ADDRESS_RE.match(addr): return False
266 addrtype, h = bc_address_to_hash_160(addr)
269 return addr == hash_160_to_bc_address(h, addrtype)
272 ########### end pywallet functions #######################
274 # secp256k1, http://www.oid-info.com/get/1.3.132.0.10
275 _p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
276 _r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
277 _b = 0x0000000000000000000000000000000000000000000000000000000000000007L
278 _a = 0x0000000000000000000000000000000000000000000000000000000000000000L
279 _Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
280 _Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
281 curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
282 generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
283 oid_secp256k1 = (1,3,132,0,10)
284 SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
286 from ecdsa.util import string_to_number, number_to_string
288 def msg_magic(message):
289 return "\x18Bitcoin Signed Message:\n" + chr( len(message) ) + message
292 class EC_KEY(object):
293 def __init__( self, secret ):
294 self.pubkey = ecdsa.ecdsa.Public_key( generator_secp256k1, generator_secp256k1 * secret )
295 self.privkey = ecdsa.ecdsa.Private_key( self.pubkey, secret )
298 def sign_message(self, message, compressed, address):
299 private_key = ecdsa.SigningKey.from_secret_exponent( self.secret, curve = SECP256k1 )
300 public_key = private_key.get_verifying_key()
301 signature = private_key.sign_digest( Hash( msg_magic(message) ), sigencode = ecdsa.util.sigencode_string )
302 assert public_key.verify_digest( signature, Hash( msg_magic(message) ), sigdecode = ecdsa.util.sigdecode_string)
304 sig = base64.b64encode( chr(27 + i + (4 if compressed else 0)) + signature )
306 self.verify_message( address, sig, message)
311 raise BaseException("error: cannot sign message")
314 def verify_message(self, address, signature, message):
315 """ See http://www.secg.org/download/aid-780/sec1-v2.pdf for the math """
316 from ecdsa import numbertheory, ellipticcurve, util
318 curve = curve_secp256k1
319 G = generator_secp256k1
321 # extract r,s from signature
322 sig = base64.b64decode(signature)
323 if len(sig) != 65: raise BaseException("Wrong encoding")
324 r,s = util.sigdecode_string(sig[1:], order)
326 if nV < 27 or nV >= 35:
327 raise BaseException("Bad encoding")
336 x = r + (recid/2) * order
338 alpha = ( x * x * x + curve.a() * x + curve.b() ) % curve.p()
339 beta = msqr.modular_sqrt(alpha, curve.p())
340 y = beta if (beta - recid) % 2 == 0 else curve.p() - beta
341 # 1.4 the constructor checks that nR is at infinity
342 R = ellipticcurve.Point(curve, x, y, order)
343 # 1.5 compute e from message:
344 h = Hash( msg_magic(message) )
345 e = string_to_number(h)
347 # 1.6 compute Q = r^-1 (sR - eG)
348 inv_r = numbertheory.inverse_mod(r,order)
349 Q = inv_r * ( s * R + minus_e * G )
350 public_key = ecdsa.VerifyingKey.from_public_point( Q, curve = SECP256k1 )
351 # check that Q is the public key
352 public_key.verify_digest( sig[1:], h, sigdecode = ecdsa.util.sigdecode_string)
353 # check that we get the original signing address
354 addr = public_key_to_bc_address( encode_point(public_key, compressed) )
356 raise BaseException("Bad signature")
359 ###################################### BIP32 ##############################
361 random_seed = lambda n: "%032x"%ecdsa.util.randrange( pow(2,n) )
365 def bip32_init(seed):
367 seed = seed.decode('hex')
368 I = hmac.new("Bitcoin seed", seed, hashlib.sha512).digest()
370 master_secret = I[0:32]
371 master_chain = I[32:]
375 master_private_key = ecdsa.SigningKey.from_string( master_secret, curve = SECP256k1 )
376 master_public_key = master_private_key.get_verifying_key()
377 K = master_public_key.to_string()
378 K_compressed = GetPubKey(master_public_key.pubkey,True)
379 return master_secret, master_chain, K, K_compressed
384 from ecdsa.util import string_to_number, number_to_string
385 order = generator_secp256k1.order()
386 keypair = EC_KEY(string_to_number(k))
387 K = GetPubKey(keypair.pubkey,True)
388 I = hmac.new(c, K + rev_hex(int_to_hex(n,4)).decode('hex'), hashlib.sha512).digest()
389 k_n = number_to_string( (string_to_number(I[0:32]) * string_to_number(k)) % order , order )
394 def CKD_prime(K, c, n):
396 from ecdsa.util import string_to_number, number_to_string
397 order = generator_secp256k1.order()
399 K_public_key = ecdsa.VerifyingKey.from_string( K, curve = SECP256k1 )
400 K_compressed = GetPubKey(K_public_key.pubkey,True)
402 I = hmac.new(c, K_compressed + rev_hex(int_to_hex(n,4)).decode('hex'), hashlib.sha512).digest()
404 #pubkey = ecdsa.ecdsa.Public_key( generator_secp256k1, string_to_number(I[0:32]) * K_public_key.pubkey.point )
405 public_key = ecdsa.VerifyingKey.from_public_point( string_to_number(I[0:32]) * K_public_key.pubkey.point, curve = SECP256k1 )
406 K_n = public_key.to_string()
407 K_n_compressed = GetPubKey(public_key.pubkey,True)
410 return K_n, K_n_compressed, c_n
414 class ElectrumSequence:
415 """ Privatekey(type,n) = Master_private_key + H(n|S|type) """
417 def __init__(self, mpk, mpk2 = None, mpk3 = None):
423 def mpk_from_seed(klass, seed):
425 secexp = klass.stretch_key(seed)
426 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
427 master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
428 return master_public_key
431 def stretch_key(self,seed):
433 for i in range(100000):
434 seed = hashlib.sha256(seed + oldseed).digest()
435 return string_to_number( seed )
437 def get_sequence(self, sequence, mpk):
438 for_change, n = sequence
439 return string_to_number( Hash( "%d:%d:"%(n,for_change) + mpk.decode('hex') ) )
441 def get_address(self, sequence):
443 pubkey = self.get_pubkey(sequence)
444 address = public_key_to_bc_address( pubkey.decode('hex') )
446 pubkey1 = self.get_pubkey(sequence)
447 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
448 address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
450 pubkey1 = self.get_pubkey(sequence)
451 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
452 pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
453 address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
456 def get_pubkey(self, sequence, mpk=None):
458 if mpk is None: mpk = self.mpk
459 z = self.get_sequence(sequence, mpk)
460 master_public_key = ecdsa.VerifyingKey.from_string( mpk.decode('hex'), curve = SECP256k1 )
461 pubkey_point = master_public_key.pubkey.point + z*curve.generator
462 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
463 return '04' + public_key2.to_string().encode('hex')
465 def get_private_key_from_stretched_exponent(self, sequence, secexp):
466 order = generator_secp256k1.order()
467 secexp = ( secexp + self.get_sequence(sequence, self.mpk) ) % order
468 pk = number_to_string( secexp, generator_secp256k1.order() )
470 return SecretToASecret( pk, compressed )
472 def get_private_key(self, sequence, seed):
473 secexp = self.stretch_key(seed)
474 return self.get_private_key_from_stretched_exponent(sequence, secexp)
476 def get_private_keys(self, sequence_list, seed):
477 secexp = self.stretch_key(seed)
478 return [ self.get_private_key_from_stretched_exponent( sequence, secexp) for sequence in sequence_list]
480 def check_seed(self, seed):
482 secexp = self.stretch_key(seed)
483 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
484 master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
485 if master_public_key != self.mpk:
486 print_error('invalid password (mpk)')
487 raise BaseException('Invalid password')
490 def get_input_info(self, sequence):
492 pk_addr = self.get_address(sequence)
495 pubkey1 = self.get_pubkey(sequence)
496 pubkey2 = self.get_pubkey(sequence,mpk=self.mpk2)
497 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
498 redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
500 pubkey1 = self.get_pubkey(sequence)
501 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
502 pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
503 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
504 redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
505 return pk_addr, redeemScript
512 def __init__(self, mpk, mpk2 = None, mpk3 = None):
518 def mpk_from_seed(klass, seed):
519 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
520 return master_public_key.encode('hex'), master_chain.encode('hex')
522 def get_pubkey(self, sequence, mpk = None):
523 if not mpk: mpk = self.mpk
524 master_public_key, master_chain = self.mpk
525 K = master_public_key.decode('hex')
526 chain = master_chain.decode('hex')
528 K, K_compressed, chain = CKD_prime(K, chain, i)
529 return K_compressed.encode('hex')
531 def get_address(self, sequence):
533 pubkey = self.get_pubkey(sequence)
534 address = public_key_to_bc_address( pubkey.decode('hex') )
536 pubkey1 = self.get_pubkey(sequence)
537 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
538 address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
540 pubkey1 = self.get_pubkey(sequence)
541 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
542 pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
543 address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
546 def get_private_key(self, sequence, seed):
547 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
551 k, chain = CKD(k, chain, i)
552 return SecretToASecret(k, True)
554 def get_private_keys(self, sequence_list, seed):
555 return [ self.get_private_key( sequence, seed) for sequence in sequence_list]
557 def check_seed(self, seed):
558 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
559 assert self.mpk == (master_public_key.encode('hex'), master_chain.encode('hex'))
561 def get_input_info(self, sequence):
563 pk_addr = self.get_address(sequence)
566 pubkey1 = self.get_pubkey(sequence)
567 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
568 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
569 redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
571 pubkey1 = self.get_pubkey(sequence)
572 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
573 pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
574 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
575 redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
576 return pk_addr, redeemScript
578 ################################## transactions
583 def __init__(self, raw):
586 self.inputs = self.d['inputs']
587 self.outputs = self.d['outputs']
588 self.outputs = map(lambda x: (x['address'],x['value']), self.outputs)
589 self.input_info = None
590 self.is_complete = True
593 def from_io(klass, inputs, outputs):
594 raw = klass.serialize(inputs, outputs, for_sig = -1) # for_sig=-1 means do not sign
596 self.is_complete = False
598 self.outputs = outputs
600 for i in self.inputs:
601 e = { 'txid':i['tx_hash'], 'vout':i['index'], 'scriptPubKey':i.get('raw_output_script') }
603 self.input_info = extras
610 def multisig_script(klass, public_keys, num=None):
612 if num is None: num = n
613 # supports only "2 of 2", and "2 of 3" transactions
614 assert num <= n and n in [2,3]
623 for k in public_keys:
624 s += var_int(len(k)/2)
634 out = { "address": hash_160_to_bc_address(hash_160(s.decode('hex')), 5), "redeemScript":s }
638 def serialize( klass, inputs, outputs, for_sig = None ):
640 s = int_to_hex(1,4) # version
641 s += var_int( len(inputs) ) # number of inputs
642 for i in range(len(inputs)):
644 s += txin['tx_hash'].decode('hex')[::-1].encode('hex') # prev hash
645 s += int_to_hex(txin['index'],4) # prev index
648 pubkeysig = txin.get('pubkeysig')
650 pubkey, sig = pubkeysig[0]
651 sig = sig + chr(1) # hashtype
652 script = op_push( len(sig))
653 script += sig.encode('hex')
654 script += op_push( len(pubkey))
655 script += pubkey.encode('hex')
657 signatures = txin['signatures']
658 pubkeys = txin['pubkeys']
660 for sig in signatures:
662 script += op_push(len(sig)/2)
665 redeem_script = klass.multisig_script(pubkeys,2).get('redeemScript')
666 script += op_push(len(redeem_script)/2)
667 script += redeem_script
670 if txin.get('redeemScript'):
671 script = txin['redeemScript'] # p2sh uses the inner script
673 script = txin['raw_output_script'] # scriptsig
676 s += var_int( len(script)/2 ) # script length
678 s += "ffffffff" # sequence
680 s += var_int( len(outputs) ) # number of outputs
681 for output in outputs:
682 addr, amount = output
683 s += int_to_hex( amount, 8) # amount
684 addrtype, hash_160 = bc_address_to_hash_160(addr)
686 script = '76a9' # op_dup, op_hash_160
687 script += '14' # push 0x14 bytes
688 script += hash_160.encode('hex')
689 script += '88ac' # op_equalverify, op_checksig
691 script = 'a9' # op_hash_160
692 script += '14' # push 0x14 bytes
693 script += hash_160.encode('hex')
694 script += '87' # op_equal
698 s += var_int( len(script)/2 ) # script length
700 s += int_to_hex(0,4) # lock time
701 if for_sig is not None and for_sig != -1:
702 s += int_to_hex(1, 4) # hash type
707 return self.serialize(self.inputs, self.outputs, for_sig = i)
711 return Hash(self.raw.decode('hex') )[::-1].encode('hex')
713 def sign(self, private_keys):
716 for i in range(len(self.inputs)):
717 txin = self.inputs[i]
718 tx_for_sig = self.serialize( self.inputs, self.outputs, for_sig = i )
720 if txin.get('redeemScript'):
721 # 1 parse the redeem script
722 num, redeem_pubkeys = deserialize.parse_redeemScript(txin.get('redeemScript'))
723 self.inputs[i]["pubkeys"] = redeem_pubkeys
725 # build list of public/private keys
727 for sec in private_keys.values():
728 compressed = is_compressed(sec)
729 pkey = regenerate_key(sec)
730 pubkey = GetPubKey(pkey.pubkey, compressed)
731 keypairs[ pubkey.encode('hex') ] = sec
733 # list of already existing signatures
734 signatures = txin.get("signatures",[])
735 print_error("signatures",signatures)
737 for pubkey in redeem_pubkeys:
738 public_key = ecdsa.VerifyingKey.from_string(pubkey[2:].decode('hex'), curve = SECP256k1)
741 public_key.verify_digest( s.decode('hex')[:-1], Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
743 except ecdsa.keys.BadSignatureError:
746 # check if we have a key corresponding to the redeem script
747 if pubkey in keypairs.keys():
749 sec = keypairs[pubkey]
750 compressed = is_compressed(sec)
751 pkey = regenerate_key(sec)
753 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
754 public_key = private_key.get_verifying_key()
755 sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
756 assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
757 signatures.append( sig.encode('hex') )
759 # for p2sh, pubkeysig is a tuple (may be incomplete)
760 self.inputs[i]["signatures"] = signatures
761 print_error("signatures",signatures)
762 self.is_complete = len(signatures) == num
765 sec = private_keys[txin['address']]
766 compressed = is_compressed(sec)
767 pkey = regenerate_key(sec)
770 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
771 public_key = private_key.get_verifying_key()
772 pkey = EC_KEY(secexp)
773 pubkey = GetPubKey(pkey.pubkey, compressed)
774 sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
775 assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
777 self.inputs[i]["pubkeysig"] = [(pubkey, sig)]
778 self.is_complete = True
780 self.raw = self.serialize( self.inputs, self.outputs )
783 def deserialize(self):
785 vds = deserialize.BCDataStream()
786 vds.write(self.raw.decode('hex'))
787 self.d = deserialize.parse_Transaction(vds)
791 def has_address(self, addr):
793 for txin in self.inputs:
794 if addr == txin.get('address'):
797 for txout in self.outputs:
804 def get_value(self, addresses, prevout_values):
805 # return the balance for that tx
808 v_in = v_out = v_out_mine = 0
810 for item in self.inputs:
811 addr = item.get('address')
812 if addr in addresses:
814 key = item['prevout_hash'] + ':%d'%item['prevout_n']
815 value = prevout_values.get( key )
823 for item in self.outputs:
826 if addr in addresses:
830 # all inputs are mine:
832 v = v_out_mine - v_in
834 # some inputs are mine:
837 v = v_out_mine - v_out
842 return is_send, v, fee
848 "complete":self.is_complete
850 if not self.is_complete:
852 for i in self.inputs:
853 e = { 'txid':i['tx_hash'], 'vout':i['index'],
854 'scriptPubKey':i.get('raw_output_script'),
855 'KeyID':i.get('KeyID'),
856 'redeemScript':i.get('redeemScript'),
857 'signatures':i.get('signatures'),
858 'pubkeys':i.get('pubkeys'),
861 self.input_info = extras
864 out['input_info'] = json.dumps(self.input_info).replace(' ','')
872 seed = "ff000000000000000000000000000000"
873 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
875 print "secret key", master_secret.encode('hex')
876 print "chain code", master_chain.encode('hex')
878 key_id = hash_160(master_public_key_compressed)
879 print "keyid", key_id.encode('hex')
881 print "address", hash_160_to_bc_address(key_id)
882 print "secret key", SecretToASecret(master_secret, True)
885 k0, c0 = CKD(master_secret, master_chain, 0)
886 print "secret", k0.encode('hex')
887 print "chain", c0.encode('hex')
888 print "secret key", SecretToASecret(k0, True)
890 K0, K0_compressed, c0 = CKD_prime(master_public_key, master_chain, 0)
891 print "address", hash_160_to_bc_address(hash_160(K0_compressed))
894 K01, K01_compressed, c01 = CKD_prime(K0, c0, 1)
895 print "address", hash_160_to_bc_address(hash_160(K01_compressed))
897 print "-- m/0/1/3 --"
898 K013, K013_compressed, c013 = CKD_prime(K01, c01, 3)
899 print "address", hash_160_to_bc_address(hash_160(K013_compressed))
901 print "-- m/0/1/3/7 --"
902 K0137, K0137_compressed, c0137 = CKD_prime(K013, c013, 7)
903 print "address", hash_160_to_bc_address(hash_160(K0137_compressed))
907 if __name__ == '__main__':