def test_multisig_sig():
sig_script = Script('OP_0 0x30440220762ce7bca626942975bfd5b130ed3470b9f538eb2ac120c2043b445709369628022051d73c80328b543f744aa64b7e9ebefa7ade3e5c716eab4a09b408d2c307ccd701 0x3045022100abf740b58d79cab000f8b0d328c2fff7eb88933971d1b63f8b99e89ca3f2dae602203354770db3cc2623349c87dea7a50cee1f78753141a5052b2d58aeb592bcf50f01 0x524104a882d414e478039cd5b52a92ffb13dd5e6bd4515497439dffd691a0f12af9575fa349b5694ed3155b136f09e63975a1700c9f4d4df849323dac06cf3bd6458cd41046ce31db9bdd543e72fe3039a1f1c047dab87037c36a669ff90e28da1848f640de68c2fe913d363a51154a0c62d7adea1b822d05035077418267b1a1379790187410411ffd36c70776538d079fbae117dc38effafb33304af83ce4894589747aee1ef992f63280567f52f5ba870678b4ab4ff6c8ea600bd217870a8b4f1f09f3a8e8353ae') # nopep8
assert sig_script.is_multisig_sig()
r = sig_script.extract_multisig_sig_info()
redeem_info = r['redeem_script'].extract_multisig_redeem_info()
assert len(r['signatures']) == 2
assert r['redeem_script']
assert isinstance(r['redeem_script'], Script)
s = Script.build_multisig_sig(r['signatures'], r['redeem_script'])
assert bytes(s) == bytes(sig_script)
# This is a test case where there is no OP_PUSHDATA
raw_scr = "00483045022100fa1225f8828fd6fe52665c3c4258169a84af52b41525f2e288082f174c032f47022022758d5519db3ab2cec4a330e96568b9289fb77c5653bce49397df01a3fcff5101475221038b5fa60aee4c4e9ab3a66e6bb32211a54da6b054c6143dd221c122ce936315d921023180e1b49b7f3fd1254a19c7aa8016ad995089b99c9dac89752cd17e40d9072d52ae" # nopep8
s, _ = Script.from_bytes(pack_var_str(bytes.fromhex(raw_scr)))
assert sig_script.is_multisig_sig()
r = s.extract_multisig_sig_info()
assert len(r['signatures']) == 1
assert r['redeem_script']
assert isinstance(r['redeem_script'], Script)
sig_addresses = sig_script.get_addresses()
assert len(sig_addresses) == redeem_info['n'] + 1
assert sig_addresses == ['1JzVFZSN1kxGLTHG41EVvY5gHxLAX7q1Rh',
'14JfSvgEq8A8S7qcvxeaSCxhn1u1L71vo4',
'1Kyy7pxzSKG75L9HhahRZgYoer9FePZL4R',
'347N1Thc213QqfYCz3PZkjoJpNv5b14kBd']
def _do_multisig_script(self, sigs, message, current_script_sig,
redeem_script, hash_type):
# If the current script is empty or None, create it
sig_script = None
if current_script_sig is None or not str(current_script_sig):
sig_bytes = [s['signature'].to_der() + pack_compact_int(hash_type)
for s in sigs]
sig_script = Script.build_multisig_sig(sigs=sig_bytes,
redeem_script=redeem_script)
else:
# Need to extract all the sigs already present
multisig_params = redeem_script.extract_multisig_redeem_info()
sig_info = current_script_sig.extract_multisig_sig_info()
# Do a few quick sanity checks
if str(sig_info['redeem_script']) != str(redeem_script):
raise ValueError(
"Redeem script in signature script does not match redeem_script!")
if len(sig_info['signatures']) == multisig_params['n']:
# Already max number of signatures
return current_script_sig
# Go through the signatures and match them up to the public keys
# in the redeem script
pub_keys = []
for pk in multisig_params['public_keys']:
pub_keys.append(crypto.PublicKey.from_bytes(pk))
existing_sigs = []
for s in sig_info['signatures']:
s1, h = s[:-1], s[-1] # Last byte is hash_type
existing_sigs.append(crypto.Signature.from_der(s1))
if h != hash_type:
raise ValueError("hash_type does not match that of the existing signatures.")
# Match them up
existing_sig_indices = self._match_sigs_to_pub_keys(existing_sigs,
pub_keys,
message)
sig_indices = {s['index']: s['signature'] for s in sigs}
# Make sure there are no dups
all_indices = set(list(existing_sig_indices.keys()) +
list(sig_indices.keys()))
if len(all_indices) < len(existing_sig_indices) + len(sig_indices):
raise ValueError("At least one signature matches an existing signature.")
if len(all_indices) > multisig_params['n']:
raise ValueError("There are too many signatures.")
all_sigs = []
for i in sorted(all_indices):
if i in existing_sig_indices:
all_sigs.append(existing_sig_indices[i])
elif i in sig_indices:
all_sigs.append(sig_indices[i])
all_sigs_bytes = [s.to_der() + pack_compact_int(hash_type)
for s in all_sigs]
sig_script = Script.build_multisig_sig(all_sigs_bytes,
redeem_script)
return sig_script
def _do_multisig_script(self, sigs, message, current_script_sig,
redeem_script, hash_type):
# If the current script is empty or None, create it
sig_script = None
if current_script_sig is None or not str(current_script_sig):
sig_bytes = [s['signature'].to_der() + pack_compact_int(hash_type)
for s in sigs]
sig_script = Script.build_multisig_sig(sigs=sig_bytes,
redeem_script=redeem_script)
else:
# Need to extract all the sigs already present
multisig_params = redeem_script.extract_multisig_redeem_info()
sig_info = current_script_sig.extract_multisig_sig_info()
# Do a few quick sanity checks
if str(sig_info['redeem_script']) != str(redeem_script):
raise ValueError(
"Redeem script in signature script does not match redeem_script!")
if len(sig_info['signatures']) == multisig_params['n']:
# Already max number of signatures
return current_script_sig
# Go through the signatures and match them up to the public keys
# in the redeem script
pub_keys = []
for pk in multisig_params['public_keys']:
pub_keys.append(crypto.PublicKey.from_bytes(pk))
existing_sigs = []
for s in sig_info['signatures']:
s1, h = s[:-1], s[-1] # Last byte is hash_type
existing_sigs.append(crypto.Signature.from_der(s1))
if h != hash_type:
raise ValueError("hash_type does not match that of the existing signatures.")
# Match them up
existing_sig_indices = self._match_sigs_to_pub_keys(existing_sigs,
pub_keys,
message)
sig_indices = {s['index']: s['signature'] for s in sigs}
# Make sure there are no dups
all_indices = set(list(existing_sig_indices.keys()) +
list(sig_indices.keys()))
if len(all_indices) < len(existing_sig_indices) + len(sig_indices):
raise ValueError("At least one signature matches an existing signature.")
if len(all_indices) > multisig_params['n']:
raise ValueError("There are too many signatures.")
all_sigs = []
for i in sorted(all_indices):
if i in existing_sig_indices:
all_sigs.append(existing_sig_indices[i])
elif i in sig_indices:
all_sigs.append(sig_indices[i])
all_sigs_bytes = [s.to_der() + pack_compact_int(hash_type)
for s in all_sigs]
sig_script = Script.build_multisig_sig(all_sigs_bytes,
redeem_script)
return sig_script
