It's a slightly modify version of LND. That was part of the controversy with the Mutiny guys. 
LND not focusing on Bitcoin stuff like Bolt12 and other stuff. Apart from the 24 locks that where happening with Zaps

nostr:npub1mutnyacc9uc4t5mmxvpprwsauj5p2qxq95v4a9j0jxl8wnkfvuyque23vg I'm I correct?