https://github.com/maxogden/torrent

https://www.npmjs.org/package/torrent

torrent <magnet link OR path to .torrent file>

  Download a torrent from a magnet link to torrent file.

torrent create <directory OR file> {-o outfile.torrent}

  Create a torrent file from a directory or file.

  If an output file isn't specified with `-o`, the torrent file will be
  written to stdout.

torrent seed <torrent file>

  Seed a torrent file.

torrent info <torrent file>

  Print information about a .torrent file to stdout as JSON.

torrent ls OPTIONS <torrent file>

  List all the files in a .torrent file.

  OPTIONS are like the `ls` command:

    -s  Show file sizes in bytes alongside file paths.
    -h  Show file sizes in human units when `-s` is on.