-record(codec, {
    encoder :: fun((any()) -> {ok, bitstring()} |
        {error, distribute@codec:encode_error()}),
    decoder :: fun((bitstring()) -> {ok, any()} |
        {error, distribute@codec:decode_error()}),
    sized_decoder :: fun((bitstring()) -> {ok, {any(), bitstring()}} |
        {error, distribute@codec:decode_error()})
}).