# Cartallum CBE SDK Use the Cartallum CBE SDK Crate to write client side applications in Rust. If writing on-chain programs, use the [Cartallum CBE Program Crate](https://crates.io/crates/cbe-program) instead. More information about Cartallum CBE is available in the [Cartallum CBE documentation](https://docs.cartallum.com/). The [Cartallum CBE Program Library](https://github.com/Cartallum/cbe-program-library) provides examples of how to use this crate. Still have questions? Ask us on [Discord](https://discordapp.com/invite/pquxPsq)