def get_address_from_input_script(bytes):
try:
decoded = [ x for x in script_GetOp(bytes) ]
- except:
+ except Exception:
# coinbase transactions raise an exception
print_error("cannot find address in input script", bytes.encode('hex'))
- return [], [], "(None)"
+ return [], {}, "(None)"
# payto_pubkey
match = [ opcodes.OP_PUSHDATA4 ]
if match_decoded(decoded, match):
- return None, None, "(pubkey)"
+ return None, {}, "(pubkey)"
# non-generated TxIn transactions push a signature
# (seventy-something bytes) and then their public key
# (65 bytes) onto the stack:
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
if match_decoded(decoded, match):
- return None, None, public_key_to_bc_address(decoded[1][1])
+ sig = decoded[0][1].encode('hex')
+ pubkey = decoded[1][1].encode('hex')
+ if sig[-2:] == '01':
+ sig = sig[:-2]
+ return [pubkey], {pubkey:sig}, public_key_to_bc_address(pubkey.decode('hex'))
+ else:
+ print_error("cannot find address in input script", bytes.encode('hex'))
+ return [], {}, "(None)"
+
# p2sh transaction, 2 of n
match = [ opcodes.OP_0 ]
return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
print_error("cannot find address in input script", bytes.encode('hex'))
- return [], [], "(None)"
+ return [], {}, "(None)"
class Transaction:
- def __init__(self, raw, is_complete = True):
+ def __init__(self, raw):
self.raw = raw
self.deserialize()
self.inputs = self.d['inputs']
self.outputs = self.d['outputs']
self.outputs = map(lambda x: (x['address'],x['value']), self.outputs)
- self.is_complete = is_complete
-
+ self.locktime = self.d['lockTime']
+
def __str__(self):
return self.raw
@classmethod
def from_io(klass, inputs, outputs):
- raw = klass.serialize(inputs, outputs, for_sig = -1) # for_sig=-1 means do not sign
+ raw = klass.serialize(inputs, outputs, for_sig = None) # for_sig=-1 means do not sign
self = klass(raw)
- self.is_complete = False
self.inputs = inputs
self.outputs = outputs
return self
+ @classmethod
+ def sweep(klass, privkeys, network, to_address, fee):
+ inputs = []
+ for privkey in privkeys:
+ pubkey = public_key_from_private_key(privkey)
+ address = address_from_private_key(privkey)
+ u = network.synchronous_get([ ('blockchain.address.listunspent',[address])])[0]
+ pay_script = klass.pay_script(address)
+ for item in u:
+ item['scriptPubKey'] = pay_script
+ item['redeemPubkey'] = pubkey
+ item['address'] = address
+ item['prevout_hash'] = item['tx_hash']
+ item['prevout_n'] = item['tx_pos']
+ inputs += u
+
+ if not inputs:
+ return
+
+ total = sum( map(lambda x:int(x.get('value')), inputs) ) - fee
+ outputs = [(to_address, total)]
+ self = klass.from_io(inputs, outputs)
+ self.sign({ pubkey:privkey })
+ return self
+
@classmethod
def multisig_script(klass, public_keys, num=None):
n = len(public_keys)
return s
+
+ @classmethod
+ def pay_script(self, addr):
+ addrtype, hash_160 = bc_address_to_hash_160(addr)
+ if addrtype == 0:
+ script = '76a9' # op_dup, op_hash_160
+ script += '14' # push 0x14 bytes
+ script += hash_160.encode('hex')
+ script += '88ac' # op_equalverify, op_checksig
+ elif addrtype == 5:
+ script = 'a9' # op_hash_160
+ script += '14' # push 0x14 bytes
+ script += hash_160.encode('hex')
+ script += '87' # op_equal
+ else:
+ raise
+ return script
+
+
@classmethod
def serialize( klass, inputs, outputs, for_sig = None ):
+ push_script = lambda x: op_push(len(x)/2) + x
s = int_to_hex(1,4) # version
s += var_int( len(inputs) ) # number of inputs
for i in range(len(inputs)):
s += txin['prevout_hash'].decode('hex')[::-1].encode('hex') # prev hash
s += int_to_hex(txin['prevout_n'],4) # prev index
- if for_sig is None:
- signatures = txin['signatures']
+ signatures = txin.get('signatures', {})
+ if for_sig is None and not signatures:
+ script = ''
+
+ elif for_sig is None:
pubkeys = txin['pubkeys']
+ sig_list = ''
+ for pubkey in pubkeys:
+ sig = signatures.get(pubkey)
+ if not sig:
+ continue
+ sig = sig + '01'
+ sig_list += push_script(sig)
+
if not txin.get('redeemScript'):
- pubkey = pubkeys[0]
- script = ''
- if signatures:
- sig = signatures[0]
- sig = sig + '01' # hashtype
- script += op_push(len(sig)/2)
- script += sig
- script += op_push(len(pubkey)/2)
- script += pubkey
+ script = sig_list
+ script += push_script(pubkeys[0])
else:
script = '00' # op_0
- for sig in signatures:
- sig = sig + '01'
- script += op_push(len(sig)/2)
- script += sig
-
+ script += sig_list
redeem_script = klass.multisig_script(pubkeys,2)
- script += op_push(len(redeem_script)/2)
- script += redeem_script
+ assert redeem_script == txin.get('redeemScript')
+ script += push_script(redeem_script)
elif for_sig==i:
if txin.get('redeemScript'):
else:
script = txin['scriptPubKey'] # scriptsig
else:
- script=''
+ script = ''
s += var_int( len(script)/2 ) # script length
s += script
s += "ffffffff" # sequence
for output in outputs:
addr, amount = output
s += int_to_hex( amount, 8) # amount
- addrtype, hash_160 = bc_address_to_hash_160(addr)
- if addrtype == 0:
- script = '76a9' # op_dup, op_hash_160
- script += '14' # push 0x14 bytes
- script += hash_160.encode('hex')
- script += '88ac' # op_equalverify, op_checksig
- elif addrtype == 5:
- script = 'a9' # op_hash_160
- script += '14' # push 0x14 bytes
- script += hash_160.encode('hex')
- script += '87' # op_equal
- else:
- raise
-
+ script = klass.pay_script(addr)
s += var_int( len(script)/2 ) # script length
s += script # script
s += int_to_hex(0,4) # lock time
return s
- def for_sig(self,i):
+ def tx_for_sig(self,i):
return self.serialize(self.inputs, self.outputs, for_sig = i)
def hash(self):
return Hash(self.raw.decode('hex') )[::-1].encode('hex')
+ def add_signature(self, i, pubkey, sig):
+ txin = self.inputs[i]
+ signatures = txin.get("signatures",{})
+ signatures[pubkey] = sig
+ txin["signatures"] = signatures
+ self.inputs[i] = txin
+ print_error("adding signature for", pubkey)
+ self.raw = self.serialize( self.inputs, self.outputs )
+
+
+ def is_complete(self):
+ for i, txin in enumerate(self.inputs):
+ redeem_script = txin.get('redeemScript')
+ num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
+ signatures = txin.get("signatures",{})
+ if len(signatures) == num:
+ continue
+ else:
+ return False
+ return True
+
def sign(self, keypairs):
- is_complete = True
print_error("tx.sign(), keypairs:", keypairs)
for i, txin in enumerate(self.inputs):
# add pubkeys
txin["pubkeys"] = redeem_pubkeys
# get list of already existing signatures
- signatures = txin.get("signatures",[])
+ signatures = txin.get("signatures",{})
# continue if this txin is complete
if len(signatures) == num:
continue
- tx_for_sig = self.serialize( self.inputs, self.outputs, for_sig = i )
+ for_sig = Hash(self.tx_for_sig(i).decode('hex'))
for pubkey in redeem_pubkeys:
- # check if we have the corresponding private key
if pubkey in keypairs.keys():
# add signature
sec = keypairs[pubkey]
- compressed = is_compressed(sec)
pkey = regenerate_key(sec)
secexp = pkey.secret
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
public_key = private_key.get_verifying_key()
- sig = private_key.sign_digest_deterministic( Hash( tx_for_sig.decode('hex') ), hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_der )
- assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
- signatures.append( sig.encode('hex') )
- print_error("adding signature for", pubkey)
-
- txin["signatures"] = signatures
- is_complete = is_complete and len(signatures) == num
-
- self.is_complete = is_complete
+ sig = private_key.sign_digest_deterministic( for_sig, hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_der )
+ assert public_key.verify_digest( sig, for_sig, sigdecode = ecdsa.util.sigdecode_der)
+ self.add_signature(i, pubkey, sig.encode('hex'))
+
+
+ print_error("is_complete", self.is_complete())
self.raw = self.serialize( self.inputs, self.outputs )
+
def deserialize(self):
vds = BCDataStream()
vds.write(self.raw.decode('hex'))
def parse_input(self, vds):
d = {}
- d['prevout_hash'] = hash_encode(vds.read_bytes(32))
- d['prevout_n'] = vds.read_uint32()
+ prevout_hash = hash_encode(vds.read_bytes(32))
+ prevout_n = vds.read_uint32()
scriptSig = vds.read_bytes(vds.read_compact_size())
- d['sequence'] = vds.read_uint32()
+ sequence = vds.read_uint32()
- if scriptSig:
- pubkeys, signatures, address = get_address_from_input_script(scriptSig)
+ if prevout_hash == '00'*32:
+ d['is_coinbase'] = True
else:
- pubkeys = []
- signatures = []
- address = None
-
- d['address'] = address
- d['signatures'] = signatures
+ d['is_coinbase'] = False
+ d['prevout_hash'] = prevout_hash
+ d['prevout_n'] = prevout_n
+ d['sequence'] = sequence
+ if scriptSig:
+ pubkeys, signatures, address = get_address_from_input_script(scriptSig)
+ else:
+ pubkeys = []
+ signatures = {}
+ address = None
+ d['address'] = address
+ d['pubkeys'] = pubkeys
+ d['signatures'] = signatures
return d
def get_input_info(self):
+ keys = ['prevout_hash', 'prevout_n', 'address', 'KeyID', 'scriptPubKey', 'redeemScript', 'redeemPubkey', 'pubkeys', 'signatures', 'is_coinbase']
info = []
for i in self.inputs:
- item = {
- 'prevout_hash':i['prevout_hash'],
- 'prevout_n':i['prevout_n'],
- 'address':i['address'],
- 'KeyID':i.get('KeyID'),
- 'scriptPubKey':i.get('scriptPubKey'),
- 'redeemScript':i.get('redeemScript'),
- 'redeemPubkey':i.get('redeemPubkey'),
- 'pubkeys':i.get('pubkeys'),
- 'signatures':i.get('signatures'),
- }
+ item = {}
+ for k in keys:
+ v = i.get(k)
+ if v is not None:
+ item[k] = v
info.append(item)
return info
import json
out = {
"hex":self.raw,
- "complete":self.is_complete
+ "complete":self.is_complete()
}
- if not self.is_complete:
+ if not self.is_complete():
input_info = self.get_input_info()
out['input_info'] = json.dumps(input_info).replace(' ','')
def add_input_info(self, input_info):
for i, txin in enumerate(self.inputs):
item = input_info[i]
- txin['address'] = item['address']
- txin['signatures'] = item['signatures']
txin['scriptPubKey'] = item['scriptPubKey']
txin['redeemScript'] = item.get('redeemScript')
txin['redeemPubkey'] = item.get('redeemPubkey')
txin['KeyID'] = item.get('KeyID')
+ txin['signatures'] = item.get('signatures',{})
git://git.novaco.in / electrum-nvc.git / blobdiff