def test_nulldata3() -> None:
err_msg = "invalid nulldata payload length: "
with pytest.raises(BTClibValueError, match=err_msg):
payload = "00" * 81
ScriptPubKey.nulldata(payload)
# wrong data length: 32 in 35-bytes nulldata script;
# it should have been 33
script_pub_key = serialize(["OP_RETURN", b"\x00" * 33])
script_pub_key = script_pub_key[:1] + b"\x20" + script_pub_key[2:]
assert not is_nulldata(script_pub_key)
# wrong data length: 32 in 83-bytes nulldata script;
# it should have been 80
script_pub_key = serialize(["OP_RETURN", b"\x00" * 80])
script_pub_key = script_pub_key[:2] + b"\x20" + script_pub_key[3:]
assert not is_nulldata(script_pub_key)
# missing OP_PUSHDATA1 (0x4c) in 83-bytes nulldata script,
# got 0x20 instead
script_pub_key = serialize(["OP_RETURN", b"\x00" * 80])
script_pub_key = script_pub_key[:1] + b"\x20" + script_pub_key[2:]
assert not is_nulldata(script_pub_key)
assert len(serialize(["OP_RETURN", b"\x00" * 75])) == 77
assert len(serialize(["OP_RETURN", b"\x00" * 76])) == 79
script_pub_key = serialize(["OP_RETURN", b"\x00" * 76])[:-1]
assert not is_nulldata(script_pub_key)
def test_nulldata() -> None:
OP_RETURN = b"\x6a" # pylint: disable=invalid-name
# self-consistency
string = "time-stamped data"
payload = string.encode()
script_pub_key = serialize(["OP_RETURN", payload])
assert script_pub_key == ScriptPubKey.nulldata(string).script
# back from the script_pub_key to the payload
assert ("nulldata", payload) == type_and_payload(script_pub_key)
# data -> payload in this case is invertible (no hash functions)
assert payload.decode("ascii") == string
assert address(script_pub_key) == ""
# documented test cases: https://learnmeabitcoin.com/guide/nulldata
string = "hello world"
payload = string.encode()
assert payload.hex() == "68656c6c6f20776f726c64" # pylint: disable=no-member
script_pub_key = OP_RETURN + var_bytes.serialize(payload)
assert script_pub_key == ScriptPubKey.nulldata(string).script
assert ("nulldata", payload) == type_and_payload(script_pub_key)
# documented test cases: https://learnmeabitcoin.com/guide/nulldata
string = "charley loves heidi"
payload = string.encode()
assert (payload.hex() # pylint: disable=no-member
== "636861726c6579206c6f766573206865696469")
script_pub_key = OP_RETURN + var_bytes.serialize(payload)
assert script_pub_key == ScriptPubKey.nulldata(string).script
assert ("nulldata", payload) == type_and_payload(script_pub_key)
# documented test cases: https://learnmeabitcoin.com/guide/nulldata
string = "家族も友達もみんなが笑顔の毎日がほしい"
payload = string.encode()
assert (
payload.hex() # pylint: disable=no-member
==
"e5aeb6e6978fe38282e58f8be98194e38282e381bfe38293e381aae3818ce7ac91e9a194e381aee6af8ee697a5e3818ce381bbe38197e38184"
)
script_pub_key = OP_RETURN + var_bytes.serialize(payload)
assert script_pub_key == ScriptPubKey.nulldata(string).script
assert ("nulldata", payload) == type_and_payload(script_pub_key)