def test_utils(self):
s_spaces = " 0C 28FCA386C7A227600B2FE50B7CAE11EC86D3BF1FBE471BE89827E19D72AA1D "
b = bytes_from_octets(s_spaces)
s = b.hex() # lower case, no spaces
self.assertNotEqual(s, s_spaces)
self.assertEqual(hash160(s_spaces), hash160(bytes_from_octets(s)))
self.assertEqual(hash256(s_spaces), hash256(bytes_from_octets(s)))
def test_hash160_hash256() -> None:
test_vectors = (plain_prv_keys + net_unaware_compressed_pub_keys +
net_unaware_uncompressed_pub_keys)
for hexstring in test_vectors:
b = bytes_from_octets(hexstring)
s = b.hex() # lower case, no spaces
assert hash160(hexstring) == hash160(s)
assert hash256(hexstring) == hash256(s)
def test_utils(self):
b = bytes_from_octets(int_with_whitespaces)
s = b.hex() # lower case, no spaces
self.assertNotEqual(int_with_whitespaces, s)
self.assertEqual(hash160(int_with_whitespaces), hash160(s))
self.assertEqual(hash256(int_with_whitespaces), hash256(s))
i = secrets.randbits(256)
self.assertEqual(i, int_from_integer(i))
self.assertEqual(i, int_from_integer(i.to_bytes(32, "big")))
self.assertEqual(i, int_from_integer(hex(i)))
def generate_merkle_root(transactions):
if len(transactions) == 0:
return hash256(b"")
hashes = [bytes.fromhex(transaction.txid) for transaction in transactions]
hashes_buffer = []
while len(hashes) != 1:
if len(hashes) % 2 != 0:
hashes.append(hashes[-1])
for x in range(len(hashes) // 2):
hashes_buffer.append(hash256(hashes[2 * x] + hashes[2 * x + 1]))
hashes = hashes_buffer[:]
hashes_buffer = []
return hashes[0].hex()
def legacy(script_: Octets, tx: Tx, vin_i: int, hash_type: int) -> bytes:
script_ = bytes_from_octets(script_)
new_tx = deepcopy(tx)
for txin in new_tx.vin:
txin.script_sig = b""
# TODO: delete sig from script_ (even if non standard)
new_tx.vin[vin_i].script_sig = script_
if hash_type & 0x1F == NONE:
new_tx.vout = []
for i, txin in enumerate(new_tx.vin):
if i != vin_i:
txin.sequence = 0
if hash_type & 0x1F == SINGLE:
# sign_hash single bug
if vin_i >= len(new_tx.vout):
return (256**31).to_bytes(32, byteorder="big", signed=False)
new_tx.vout = new_tx.vout[:vin_i + 1]
for txout in new_tx.vout[:-1]:
txout.script_pub_key = ScriptPubKey(b"")
txout.value = 0xFFFFFFFFFFFFFFFF
for i, txin in enumerate(new_tx.vin):
if i != vin_i:
txin.sequence = 0
if hash_type & 0x80:
new_tx.vin = [new_tx.vin[vin_i]]
preimage = new_tx.serialize(include_witness=False, check_validity=False)
preimage += hash_type.to_bytes(4, byteorder="little", signed=False)
return hash256(preimage)
def hash(self) -> bytes:
"""Return the transaction hash.
It differs from tx_id for witness transactions.
"""
serialized_ = self.serialize(include_witness=True,
check_validity=False)
hash256_ = hash256(serialized_)
return hash256_[::-1]
def segwit_v0(script_: Octets, tx: Tx, vin_i: int, hash_type: int,
amount: int) -> bytes:
script_ = bytes_from_octets(script_)
hash_prev_outs = b"\x00" * 32
if not hash_type & ANYONECANPAY:
hash_prev_outs = b"".join([vin.prev_out.serialize() for vin in tx.vin])
hash_prev_outs = hash256(hash_prev_outs)
hash_seqs = b"\x00" * 32
if (not (hash_type & ANYONECANPAY) and (hash_type & 0x1F) != SINGLE
and (hash_type & 0x1F) != NONE):
hash_seqs = b"".join([
vin.sequence.to_bytes(4, byteorder="little", signed=False)
for vin in tx.vin
])
hash_seqs = hash256(hash_seqs)
hash_outputs = b"\x00" * 32
if hash_type & 0x1F not in (SINGLE, NONE):
hash_outputs = b"".join([vout.serialize() for vout in tx.vout])
hash_outputs = hash256(hash_outputs)
elif (hash_type & 0x1F) == SINGLE and vin_i < len(tx.vout):
hash_outputs = hash256(tx.vout[vin_i].serialize())
preimage = b"".join([
tx.version.to_bytes(4, byteorder="little", signed=False),
hash_prev_outs,
hash_seqs,
tx.vin[vin_i].prev_out.serialize(),
var_bytes.serialize(script_),
amount.to_bytes(8, byteorder="little", signed=False), # value
tx.vin[vin_i].sequence.to_bytes(4, byteorder="little", signed=False),
hash_outputs,
tx.lock_time.to_bytes(4, byteorder="little", signed=False),
hash_type.to_bytes(4, byteorder="little", signed=False),
])
return hash256(preimage)
def test_utils(self):
s = "0C28FCA386C7A227600B2FE50B7CAE11EC86D3BF1FBE471BE89827E19D72AA1D"
self.assertEqual(hash160(s), hash160(bytes.fromhex(s)))
self.assertEqual(hash256(s), hash256(bytes.fromhex(s)))
def _hash256(variable, data, memory):
memory[variable] = hash256(memory[data[0]])
def test_hash160_hash256() -> None:
test_vectors = (plain_prv_keys + net_unaware_compressed_pub_keys +
net_unaware_uncompressed_pub_keys)
for hexstring in test_vectors:
hash160(hexstring)
hash256(hexstring)
def id(self) -> bytes:
"Return the transaction id."
serialized_ = self.serialize(include_witness=False,
check_validity=False)
hash256_ = hash256(serialized_)
return hash256_[::-1]
