Discrete Log Contracts (DLC)
Described as <a href="https://medium.com/@gertjaap/discreet-log-contracts-invisible-smart-contracts-on-the-bitcoin-blockchain-cc8afbdbf0db">“invisible smart contracts,”</a> DLCs allow two parties to form a contract to redistribute their funds to each other without revealing any details of those conditions to the blockchain. The transaction’s appearance on the blockchain will be no different than an ordinary multi-signature output, making it “discrete”