private ParityStateChange <UInt256?> DecodeChange(RlpStream rlpStream) { int sequenceLength = rlpStream.ReadSequenceLength(); if (sequenceLength == 0) { return(null); } ParityStateChange <UInt256?> change = new ParityStateChange <UInt256?>(rlpStream.DecodeNullableUInt256(), rlpStream.DecodeNullableUInt256()); return(change); }