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) )
362 BIP32_PRIME = 0x80000000
364 def bip32_init(seed):
366 seed = seed.decode('hex')
367 I = hmac.new("Bitcoin seed", seed, hashlib.sha512).digest()
369 master_secret = I[0:32]
370 master_chain = I[32:]
372 K, K_compressed = get_pubkeys_from_secret(master_secret)
373 return master_secret, master_chain, K, K_compressed
376 def get_pubkeys_from_secret(secret):
379 private_key = ecdsa.SigningKey.from_string( secret, curve = SECP256k1 )
380 public_key = private_key.get_verifying_key()
381 K = public_key.to_string()
382 K_compressed = GetPubKey(public_key.pubkey,True)
383 return K, K_compressed
390 from ecdsa.util import string_to_number, number_to_string
391 order = generator_secp256k1.order()
392 keypair = EC_KEY(string_to_number(k))
393 K = GetPubKey(keypair.pubkey,True)
396 data = chr(0) + k + rev_hex(int_to_hex(n,4)).decode('hex')
397 I = hmac.new(c, data, hashlib.sha512).digest()
399 I = hmac.new(c, K + rev_hex(int_to_hex(n,4)).decode('hex'), hashlib.sha512).digest()
401 k_n = number_to_string( (string_to_number(I[0:32]) + string_to_number(k)) % order , order )
406 def CKD_prime(K, c, n):
408 from ecdsa.util import string_to_number, number_to_string
409 order = generator_secp256k1.order()
411 if n & BIP32_PRIME: raise
413 K_public_key = ecdsa.VerifyingKey.from_string( K, curve = SECP256k1 )
414 K_compressed = GetPubKey(K_public_key.pubkey,True)
416 I = hmac.new(c, K_compressed + rev_hex(int_to_hex(n,4)).decode('hex'), hashlib.sha512).digest()
419 pubkey_point = string_to_number(I[0:32])*curve.generator + K_public_key.pubkey.point
420 public_key = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
422 K_n = public_key.to_string()
423 K_n_compressed = GetPubKey(public_key.pubkey,True)
426 return K_n, K_n_compressed, c_n
430 class ElectrumSequence:
431 """ Privatekey(type,n) = Master_private_key + H(n|S|type) """
433 def __init__(self, mpk, mpk2 = None, mpk3 = None):
439 def mpk_from_seed(klass, seed):
441 secexp = klass.stretch_key(seed)
442 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
443 master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
444 return master_public_key
447 def stretch_key(self,seed):
449 for i in range(100000):
450 seed = hashlib.sha256(seed + oldseed).digest()
451 return string_to_number( seed )
453 def get_sequence(self, sequence, mpk):
454 for_change, n = sequence
455 return string_to_number( Hash( "%d:%d:"%(n,for_change) + mpk.decode('hex') ) )
457 def get_address(self, sequence):
459 pubkey = self.get_pubkey(sequence)
460 address = public_key_to_bc_address( pubkey.decode('hex') )
462 pubkey1 = self.get_pubkey(sequence)
463 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
464 address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
466 pubkey1 = self.get_pubkey(sequence)
467 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
468 pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
469 address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
472 def get_pubkey(self, sequence, mpk=None):
474 if mpk is None: mpk = self.mpk
475 z = self.get_sequence(sequence, mpk)
476 master_public_key = ecdsa.VerifyingKey.from_string( mpk.decode('hex'), curve = SECP256k1 )
477 pubkey_point = master_public_key.pubkey.point + z*curve.generator
478 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
479 return '04' + public_key2.to_string().encode('hex')
481 def get_private_key_from_stretched_exponent(self, sequence, secexp):
482 order = generator_secp256k1.order()
483 secexp = ( secexp + self.get_sequence(sequence, self.mpk) ) % order
484 pk = number_to_string( secexp, generator_secp256k1.order() )
486 return SecretToASecret( pk, compressed )
488 def get_private_key(self, sequence, seed):
489 secexp = self.stretch_key(seed)
490 return self.get_private_key_from_stretched_exponent(sequence, secexp)
492 def get_private_keys(self, sequence_list, seed):
493 secexp = self.stretch_key(seed)
494 return [ self.get_private_key_from_stretched_exponent( sequence, secexp) for sequence in sequence_list]
496 def check_seed(self, seed):
498 secexp = self.stretch_key(seed)
499 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
500 master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
501 if master_public_key != self.mpk:
502 print_error('invalid password (mpk)')
503 raise BaseException('Invalid password')
506 def get_input_info(self, sequence):
508 pk_addr = self.get_address(sequence)
511 pubkey1 = self.get_pubkey(sequence)
512 pubkey2 = self.get_pubkey(sequence,mpk=self.mpk2)
513 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
514 redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
516 pubkey1 = self.get_pubkey(sequence)
517 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
518 pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
519 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
520 redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
521 return pk_addr, redeemScript
528 def __init__(self, mpk, mpk2 = None, mpk3 = None):
534 def mpk_from_seed(klass, seed):
535 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
536 return master_public_key.encode('hex'), master_chain.encode('hex')
538 def get_pubkey(self, sequence, mpk = None):
539 if not mpk: mpk = self.mpk
540 master_public_key, master_chain = mpk
541 K = master_public_key.decode('hex')
542 chain = master_chain.decode('hex')
544 K, K_compressed, chain = CKD_prime(K, chain, i)
545 return K_compressed.encode('hex')
547 def get_address(self, sequence):
549 pubkey = self.get_pubkey(sequence)
550 address = public_key_to_bc_address( pubkey.decode('hex') )
552 pubkey1 = self.get_pubkey(sequence)
553 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
554 address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
556 pubkey1 = self.get_pubkey(sequence)
557 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
558 pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
559 address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
562 def get_private_key(self, sequence, seed):
563 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
567 k, chain = CKD(k, chain, i)
568 return SecretToASecret(k, True)
570 def get_private_keys(self, sequence_list, seed):
571 return [ self.get_private_key( sequence, seed) for sequence in sequence_list]
573 def check_seed(self, seed):
574 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
575 assert self.mpk == (master_public_key.encode('hex'), master_chain.encode('hex'))
577 def get_input_info(self, sequence):
579 pk_addr = self.get_address(sequence)
582 pubkey1 = self.get_pubkey(sequence)
583 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
584 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
585 redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
587 pubkey1 = self.get_pubkey(sequence)
588 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
589 pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
590 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
591 redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
592 return pk_addr, redeemScript
594 ################################## transactions
596 MIN_RELAY_TX_FEE = 10000
600 def __init__(self, raw):
603 self.inputs = self.d['inputs']
604 self.outputs = self.d['outputs']
605 self.outputs = map(lambda x: (x['address'],x['value']), self.outputs)
606 self.input_info = None
607 self.is_complete = True
610 def from_io(klass, inputs, outputs):
611 raw = klass.serialize(inputs, outputs, for_sig = -1) # for_sig=-1 means do not sign
613 self.is_complete = False
615 self.outputs = outputs
617 for i in self.inputs:
618 e = { 'txid':i['tx_hash'], 'vout':i['index'], 'scriptPubKey':i.get('raw_output_script') }
620 self.input_info = extras
627 def multisig_script(klass, public_keys, num=None):
629 if num is None: num = n
630 # supports only "2 of 2", and "2 of 3" transactions
631 assert num <= n and n in [2,3]
640 for k in public_keys:
641 s += var_int(len(k)/2)
651 out = { "address": hash_160_to_bc_address(hash_160(s.decode('hex')), 5), "redeemScript":s }
655 def serialize( klass, inputs, outputs, for_sig = None ):
657 s = int_to_hex(1,4) # version
658 s += var_int( len(inputs) ) # number of inputs
659 for i in range(len(inputs)):
661 s += txin['tx_hash'].decode('hex')[::-1].encode('hex') # prev hash
662 s += int_to_hex(txin['index'],4) # prev index
665 pubkeysig = txin.get('pubkeysig')
667 pubkey, sig = pubkeysig[0]
668 sig = sig + chr(1) # hashtype
669 script = op_push( len(sig))
670 script += sig.encode('hex')
671 script += op_push( len(pubkey))
672 script += pubkey.encode('hex')
674 signatures = txin['signatures']
675 pubkeys = txin['pubkeys']
677 for sig in signatures:
679 script += op_push(len(sig)/2)
682 redeem_script = klass.multisig_script(pubkeys,2).get('redeemScript')
683 script += op_push(len(redeem_script)/2)
684 script += redeem_script
687 if txin.get('redeemScript'):
688 script = txin['redeemScript'] # p2sh uses the inner script
690 script = txin['raw_output_script'] # scriptsig
693 s += var_int( len(script)/2 ) # script length
695 s += "ffffffff" # sequence
697 s += var_int( len(outputs) ) # number of outputs
698 for output in outputs:
699 addr, amount = output
700 s += int_to_hex( amount, 8) # amount
701 addrtype, hash_160 = bc_address_to_hash_160(addr)
703 script = '76a9' # op_dup, op_hash_160
704 script += '14' # push 0x14 bytes
705 script += hash_160.encode('hex')
706 script += '88ac' # op_equalverify, op_checksig
708 script = 'a9' # op_hash_160
709 script += '14' # push 0x14 bytes
710 script += hash_160.encode('hex')
711 script += '87' # op_equal
715 s += var_int( len(script)/2 ) # script length
717 s += int_to_hex(0,4) # lock time
718 if for_sig is not None and for_sig != -1:
719 s += int_to_hex(1, 4) # hash type
724 return self.serialize(self.inputs, self.outputs, for_sig = i)
728 return Hash(self.raw.decode('hex') )[::-1].encode('hex')
730 def sign(self, private_keys):
733 for i in range(len(self.inputs)):
734 txin = self.inputs[i]
735 tx_for_sig = self.serialize( self.inputs, self.outputs, for_sig = i )
737 if txin.get('redeemScript'):
738 # 1 parse the redeem script
739 num, redeem_pubkeys = deserialize.parse_redeemScript(txin.get('redeemScript'))
740 self.inputs[i]["pubkeys"] = redeem_pubkeys
742 # build list of public/private keys
744 for sec in private_keys.values():
745 compressed = is_compressed(sec)
746 pkey = regenerate_key(sec)
747 pubkey = GetPubKey(pkey.pubkey, compressed)
748 keypairs[ pubkey.encode('hex') ] = sec
750 # list of already existing signatures
751 signatures = txin.get("signatures",[])
752 print_error("signatures",signatures)
754 for pubkey in redeem_pubkeys:
755 public_key = ecdsa.VerifyingKey.from_string(pubkey[2:].decode('hex'), curve = SECP256k1)
758 public_key.verify_digest( s.decode('hex')[:-1], Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
760 except ecdsa.keys.BadSignatureError:
763 # check if we have a key corresponding to the redeem script
764 if pubkey in keypairs.keys():
766 sec = keypairs[pubkey]
767 compressed = is_compressed(sec)
768 pkey = regenerate_key(sec)
770 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
771 public_key = private_key.get_verifying_key()
772 sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
773 assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
774 signatures.append( sig.encode('hex') )
776 # for p2sh, pubkeysig is a tuple (may be incomplete)
777 self.inputs[i]["signatures"] = signatures
778 print_error("signatures",signatures)
779 self.is_complete = len(signatures) == num
782 sec = private_keys[txin['address']]
783 compressed = is_compressed(sec)
784 pkey = regenerate_key(sec)
787 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
788 public_key = private_key.get_verifying_key()
789 pkey = EC_KEY(secexp)
790 pubkey = GetPubKey(pkey.pubkey, compressed)
791 sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
792 assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
794 self.inputs[i]["pubkeysig"] = [(pubkey, sig)]
795 self.is_complete = True
797 self.raw = self.serialize( self.inputs, self.outputs )
800 def deserialize(self):
802 vds = deserialize.BCDataStream()
803 vds.write(self.raw.decode('hex'))
804 self.d = deserialize.parse_Transaction(vds)
808 def has_address(self, addr):
810 for txin in self.inputs:
811 if addr == txin.get('address'):
814 for txout in self.outputs:
821 def get_value(self, addresses, prevout_values):
822 # return the balance for that tx
827 v_in = v_out = v_out_mine = 0
829 for item in self.inputs:
830 addr = item.get('address')
831 if addr in addresses:
834 key = item['prevout_hash'] + ':%d'%item['prevout_n']
835 value = prevout_values.get( key )
843 if not is_send: is_partial = False
845 for item in self.outputs:
848 if addr in addresses:
853 # some inputs are mine:
856 v = v_out_mine - v_out
862 v = v_out_mine - v_in
865 # some inputs are mine, but not all
869 # all inputs are mine
872 return is_relevant, is_send, v, fee
878 "complete":self.is_complete
880 if not self.is_complete:
882 for i in self.inputs:
883 e = { 'txid':i['tx_hash'], 'vout':i['index'],
884 'scriptPubKey':i.get('raw_output_script'),
885 'KeyID':i.get('KeyID'),
886 'redeemScript':i.get('redeemScript'),
887 'signatures':i.get('signatures'),
888 'pubkeys':i.get('pubkeys'),
891 self.input_info = extras
894 out['input_info'] = json.dumps(self.input_info).replace(' ','')
899 def requires_fee(self, verifier):
900 # see https://en.bitcoin.it/wiki/Transaction_fees
902 size = len(self.raw)/2
906 for o in self.outputs:
911 for i in self.inputs:
912 age = verifier.get_confirmations(i["tx_hash"])[0]
913 sum += i["value"] * age
914 priority = sum / size
915 print_error(priority, threshold)
916 return priority < threshold
921 def test_bip32(seed, sequence):
924 see https://en.bitcoin.it/wiki/BIP_0032_TestVectors
927 master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
929 print "secret key", master_secret.encode('hex')
930 print "chain code", master_chain.encode('hex')
932 key_id = hash_160(master_public_key_compressed)
933 print "keyid", key_id.encode('hex')
935 print "address", hash_160_to_bc_address(key_id)
936 print "secret key", SecretToASecret(master_secret, True)
942 for n in sequence.split('/'):
944 print "Chain [%s]" % '/'.join(s)
946 n = int(n[:-1]) + BIP32_PRIME if n[-1] == "'" else int(n)
947 k0, c0 = CKD(k, c, n)
948 K0, K0_compressed = get_pubkeys_from_secret(k0)
951 print " * (main addr)", hash_160_to_bc_address(hash_160(K0_compressed))
954 print " * (hex)", k0.encode('hex')
955 print " * (wif)", SecretToASecret(k0, True)
958 print " * (hex)", c0.encode('hex')
967 if __name__ == '__main__':
968 test_bip32("000102030405060708090a0b0c0d0e0f", "0'/1/2'/2/1000000000")
969 test_bip32("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542","0/2147483647'/1/2147483646'/2")