test_invalid_envelope()¶

@pytest.mark.exception_test
@pytest.mark.parametrize(
    "envelope, error",
    [
        pytest.param(
            "empty",
            [
                TransactionException.RLP_ERROR_EOF,
                TransactionException.TYPE_NOT_SUPPORTED,
            ],
            id="empty",
        ),
        pytest.param(
            "reserved_type_byte",
            [
                TransactionException.RLP_INVALID_HEADER,
                TransactionException.RLP_ERROR_EOF,
                TransactionException.TYPE_NOT_SUPPORTED,
            ],
            id="reserved_type_byte",
        ),
    ],
)
def test_invalid_envelope(
    transaction_test: TransactionTestFiller,
    pre: Alloc,
    fork: Fork,
    envelope: str,
    error: TransactionException | list[TransactionException],
) -> None:
    """
    Send an empty transaction, or one whose first byte is 0xff.

    Neither is a valid transaction under any fork. An empty input has
    no type byte or RLP header to read. Before EIP-2718, 0xff is the
    header of a list whose 8-byte length runs past the input;
    afterwards it is the type byte EIP-2718 reserves, so clients may
    report either an RLP error or an unsupported type.
    """
    if envelope == "empty":
        rlp = b""
    elif envelope == "reserved_type_byte":
        rlp = b"\xff" + encode_tx(signed_tx_fields(pre, fork))
    transaction_test(pre=pre, tx=invalid_tx(pre, rlp, error))