In-house lawyers with a budding blockchain interest just got an early holiday gift—a public primer guide to smart contracts from the U.S. Commodity Futures Trading Commission.

The CFTC’s LabCFTC released “A CFTC Primer on Smart Contracts” Tuesday to help explain the new blockchain-based technology’s risks, benefits and challenges. The guide comes at a time of regulatory uncertainty for the fast-growing blockchain industry and provides some clarity for in-house lawyers interested in implementing smart contracts.