Also, GeneratorTable::configure() was not being called in the main
SinsemillaChip::configure(), which meant the lookup argument had
not been activated. This has now been fixed.
Co-authored-by: Jack Grigg <jack@electriccoin.co>
witness_message() witnesses a full message given a bitstring.
The other two APIs, witness_message_piece_bitstring() and
witness_message_piece_field(), both witness a message piece, i.e.
part of a message that fits within a single base field element.
witness_message_piece_bitstring() takes in a bitstring, while
witness_message_piece_field() takes in a field element. In the
latter case, the number of words encoded must be specified.