DecodeList decodes a RLP-encoded list given the startIndex it returns a list of encodedItems, number of bytes that were read and err if any.

DecodeString decodes a RLP-encoded string given the startIndex it returns decoded string, number of bytes that were read and err if any.

ReadSize looks at the first byte at startIndex to decode the type and reads as many bytes as needed to determine the data byte size, it returns a flag if the type is string, start index of data part in the input, number of bytes that has to be read for data (from start index of data) and error if any.

not in use, here only for inclusivity.

not in use, here only for inclusivity.