Rock-n-rollup
Wow, you find this framework, that means you are intrigued with this awesome framework.
Let me introduce this framework for you.
Rock-n-rollup is an opiniated framework to develop smart rollups on Tezos. The goal of this framework is to ease the development of smart rollups for Rust developers. That's why this framework looks like actix/axum/bevy. We decided to use the "dependency injection at runtime pattern".
When you develop a webserver, you will develop what you call endpoint or routes, for smart rollup it's the same way but it's named transition.
In addition, this framework comes with many useful plugins to help you implement your deepest desires.
Finnaly, this framework also comes with tooling to setup/deploy your rollup.
It can happen we don't share the same opinion. If so, please have a look to this book. If you are convinced this framework is not what you are looking for, please use the official Tezos library.