halo2-examples VS zkp-tests

To me, Halo2 had the steepest learning curve by far. Not just because of having to understand how PLONKish arithmetization works to build the circuits, but mostly because I found Halo2's API quite complex and its documentation hard to find. There are also few resources for learning Halo2: the best I found were the 0xparc course which provides a few really valuable code samples, as well as the examples in the main repo. You may also want to check out awesome-halo2 for updated resources.

There are multiple languages and frameworks that you can choose from for writing ZK circuits, either general purpose (like Circom) or specific to a certain platform (like Cairo). I have tried out three different languages, Circom, Halo2, and Noir, and implemented the same circuit to compare them. The circuit proves that the user knows the results of a private set of rock-paper-scissors matches, such that the total score matches a public output. The score is calculated as specified in the definition of advent of code 2022 day 2, which I used for inspiration for the problem.