S-two is a state-of-the-art framework for creating STARK proofs that provides the following features:
A frontend designed to be flexible to allow you to express your own constraints
A backend that leverages Circle STARKs over the Mersenne31 prime field for fast prover performance
Seamlessly integrated with Cairo
This book will guide you through the process of creating your own constraints and then proving them using S-two. It will also provide in-depth explanations of the inner workings of how S-two implements Circle STARKs.