"""
todolist:
* passwords, private keys storage
* multisig service
* compatibility with old addresses for restore
* gui
an account may use one or several MPKs.
due to the type 1 derivations, we need to pass the mpk to this function
None : all accounts
-1 : imported
0,1... : seeded sequences
each account has a public and private master key
"""
from bitcoin import *
class Account(object):
def __init__(self, v):
self.addresses = v.get('0', [])
self.change = v.get('1', [])
self.name = v.get('name', 'unnamed')
def dump(self):
return {'0':self.addresses, '1':self.change, 'name':self.name}
def get_name(self):
return self.name
def get_addresses(self, for_change):
return self.change[:] if for_change else self.addresses[:]
def create_new_address(self, for_change):
addresses = self.change if for_change else self.addresses
n = len(addresses)
address = self.get_new_address( for_change, n)
addresses.append(address)
print address
return address
def get_new_address(self, for_change, n):
pass
class OldAccount(Account):
""" Privatekey(type,n) = Master_private_key + H(n|S|type) """
def __init__(self, mpk, mpk2 = None, mpk3 = None):
self.mpk = mpk
self.mpk2 = mpk2
self.mpk3 = mpk3
@classmethod
def mpk_from_seed(klass, seed):
curve = SECP256k1
secexp = klass.stretch_key(seed)
master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
return master_public_key
@classmethod
def stretch_key(self,seed):
oldseed = seed
for i in range(100000):
seed = hashlib.sha256(seed + oldseed).digest()
return string_to_number( seed )
def get_sequence(self, sequence, mpk):
for_change, n = sequence
return string_to_number( Hash( "%d:%d:"%(n,for_change) + mpk.decode('hex') ) )
def get_address(self, sequence):
if not self.mpk2:
pubkey = self.get_pubkey(sequence)
address = public_key_to_bc_address( pubkey.decode('hex') )
elif not self.mpk3:
pubkey1 = self.get_pubkey(sequence)
pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
else:
pubkey1 = self.get_pubkey(sequence)
pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
return address
def get_pubkey(self, sequence, mpk=None):
curve = SECP256k1
if mpk is None: mpk = self.mpk
z = self.get_sequence(sequence, mpk)
master_public_key = ecdsa.VerifyingKey.from_string( mpk.decode('hex'), curve = SECP256k1 )
pubkey_point = master_public_key.pubkey.point + z*curve.generator
public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
return '04' + public_key2.to_string().encode('hex')
def get_private_key_from_stretched_exponent(self, sequence, secexp):
order = generator_secp256k1.order()
secexp = ( secexp + self.get_sequence(sequence, self.mpk) ) % order
pk = number_to_string( secexp, generator_secp256k1.order() )
compressed = False
return SecretToASecret( pk, compressed )
def get_private_key(self, sequence, seed):
secexp = self.stretch_key(seed)
return self.get_private_key_from_stretched_exponent(sequence, secexp)
def get_private_keys(self, sequence_list, seed):
secexp = self.stretch_key(seed)
return [ self.get_private_key_from_stretched_exponent( sequence, secexp) for sequence in sequence_list]
def check_seed(self, seed):
curve = SECP256k1
secexp = self.stretch_key(seed)
master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
if master_public_key != self.mpk:
print_error('invalid password (mpk)')
raise BaseException('Invalid password')
return True
def get_input_info(self, sequence):
if not self.mpk2:
pk_addr = self.get_address(sequence)
redeemScript = None
elif not self.mpk3:
pubkey1 = self.get_pubkey(sequence)
pubkey2 = self.get_pubkey(sequence,mpk=self.mpk2)
pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
else:
pubkey1 = self.get_pubkey(sequence)
pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
return pk_addr, redeemScript
class BIP32_Account(Account):
def __init__(self, v):
Account.__init__(self, v)
self.c = v['c'].decode('hex')
self.K = v['K'].decode('hex')
self.cK = v['cK'].decode('hex')
def dump(self):
d = Account.dump(self)
d['c'] = self.c.encode('hex')
d['K'] = self.K.encode('hex')
d['cK'] = self.cK.encode('hex')
return d
def get_new_address(self, for_change, n):
pubkey = self.get_pubkey(for_change, n)
address = public_key_to_bc_address( pubkey )
return address
def get_pubkey(self, for_change, n):
K = self.K
chain = self.c
for i in [for_change, n]:
K, K_compressed, chain = CKD_prime(K, chain, i)
return K_compressed
def get_address(self, sequence):
for_change, n = sequence
pubkey = self.get_pubkey(for_change, n)
address = public_key_to_bc_address( pubkey )
return address
def get_private_key(self, sequence, master_k):
chain = self.c
k = master_k
for i in sequence:
k, chain = CKD(k, chain, i)
return SecretToASecret(k, True)
def get_private_keys(self, sequence_list, seed):
return [ self.get_private_key( sequence, seed) for sequence in sequence_list]
def check_seed(self, seed):
master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
assert self.mpk == (master_public_key.encode('hex'), master_chain.encode('hex'))
def get_input_info(self, sequence):
pk_addr = self.get_address(sequence)
redeemScript = None
return pk_addr, redeemScript
class BIP32_Account_2of2(BIP32_Account):
def __init__(self, v):
BIP32_Account.__init__(self, v)
self.c2 = v['c2'].decode('hex')
self.K2 = v['K2'].decode('hex')
self.cK2 = v['cK2'].decode('hex')
def dump(self):
d = BIP32_Account.dump(self)
d['c2'] = self.c2.encode('hex')
d['K2'] = self.K2.encode('hex')
d['cK2'] = self.cK2.encode('hex')
return d
def get_pubkey2(self, for_change, n):
K = self.K2
chain = self.c2
for i in [for_change, n]:
K, K_compressed, chain = CKD_prime(K, chain, i)
return K_compressed
def get_new_address(self, for_change, n):
pubkey1 = self.get_pubkey(for_change, n)
pubkey2 = self.get_pubkey2(for_change, n)
address = Transaction.multisig_script([pubkey1.encode('hex'), pubkey2.encode('hex')], 2)["address"]
return address
def get_input_info(self, sequence):
chain, i = sequence
pubkey1 = self.get_pubkey(chain, i)
pubkey2 = self.get_pubkey2(chain, i)
# fixme
pk_addr = None # public_key_to_bc_address( pubkey1 ) # we need to return that address to get the right private key
redeemScript = Transaction.multisig_script([pubkey1.encode('hex'), pubkey2.encode('hex')], 2)['redeemScript']
return pk_addr, redeemScript