# RGB-121 Library > :warning: **Warning: this is a work in progress** RGB121 is an RGB schema for collectibles on bitcoin & lightning. This repository provides rust library and a command-line utility `rgb121` which can be used alongside RGB Node to generate and parse RGB121 data (schema, issue assets, interpret contract information returned by RGB Node). ## Command-line utility ### Install with Docker #### Build Clone the repository and checkout to the desired version (here `v0.1.0`): ```console $ git clone https://github.com/RGB-Tools/rust-rgb121 $ cd rust-rgb121 $ git checkout v0.1.0 ``` Build and tag the Docker image: ```console $ docker build -t rgb121:v0.1.0 . ``` #### Usage ```console $ docker run rgb121:v0.1.0 --help ```