cast to-rlp
RLP encodes hex data, or an array of hex data.
$ cast to-rlp --help
Usage: cast to-rlp [VALUE]
Arguments:
  [VALUE]
          The value to convert.
          
          This is a hex-encoded string, or an array of hex-encoded strings. Can
          be arbitrarily recursive.
Options:
  -h, --help
          Print help (see a summary with '-h')