We would like to share some examples of the working process to integrate Litecoin into ICP
https://github.com/Octan-Finance/rust-litecoin/tree/litecoin-compatible This is a library for Litecoin network in rust language. It's a fork from the rust-bitcoin library
https://github.com/Octan-Finance/dfinity-ic/tree/litecoin-demo IC Bitcoin Adapter fork. It's using above rust-litecoin library
https://github.com/Octan-Finance/dfinity-litecoin-integration Canister Examples
Demo Video: https://youtu.be/aQQCt6XXOM0