Add `bytes_len()` to Params (#848)
* add len() to Params * Rename to `len_bytes()` Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com> * Update comment. Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com> * Update types/src/params.rs * Update types/src/params.rs * Update types/src/params.rs * Update types/src/params.rs Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>