public static List<RlpType> asRlpValues(
            RawTransaction rawTransaction, Sign.SignatureData signatureData) {
        return rawTransaction.getTransaction().asRlpValues(signatureData);
    }
@Test
    public void testContractAsRlpValues() {
        List<RlpType> rlpStrings =
                TransactionEncoder.asRlpValues(createContractTransaction(), null);
        assertEquals(rlpStrings.size(), (6));
        assertEquals(rlpStrings.get(3), (RlpString.create("")));
    }