def check_script_size(script: bytes) -> None:
try:
r = BufferReader(script)
n = read_uint32_be(r)
r.read(n)
n = read_uint32_be(r)
ensure(r.remaining_count() == n)
except (AssertionError, EOFError):
raise wire.DataError("Invalid script")
def check_tx_params_size(params: bytes) -> None:
try:
r = BufferReader(params)
tag = r.get()
if tag == EP_TAG_NAMED:
n = r.get()
r.read(n)
elif tag > 4:
raise wire.DataError("Unknown entrypoint tag")
n = read_uint32_be(r)
ensure(r.remaining_count() == n)
except (AssertionError, EOFError):
raise wire.DataError("Invalid transaction parameters")
def decode_seq(data: memoryview) -> list[memoryview]:
r = BufferReader(data)
if r.get() != 0x30:
raise ValueError
n = read_length(r)
seq = []
end = r.offset + n
while r.offset < end:
i = read_int(r)
seq.append(i)
if r.offset != end or r.remaining_count():
raise ValueError
return seq
def decode_seq(data: bytes) -> List[bytes]:
r = BufferReader(data)
if r.get() != 0x30:
raise ValueError
n = decode_length(r)
seq = []
end = r.offset + n
while r.offset < end:
i = decode_int(r)
seq.append(i)
if r.offset != end or r.remaining_count():
raise ValueError
return seq