halo2 VS halo2

[package] name = "fibonacci" version = "0.1.0" edition = "2023" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [lib] name = "halo2_examples" path = "src/lib.rs" [features] dev-graph = ["halo2_proofs/dev-graph", "plotters"] [dependencies] halo2_proofs = { git = "https://github.com/zcash/halo2.git", rev = "a898d65ae3ad3d41987666f6a03cfc15edae01c4"} plotters = { version = "0.3.0", optional = true } tabbycat = { version = "0.1", features = ["attributes"], optional = true }

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.

Not all components of the project are open source. Cake's response omit's a key detail. Have a look at the license for Halo

Circuits were written with Circom and that’s what we’re going to change. We’ll rewrite those circuits with Halo2, the PSE implementation (the KZG one, i’ll tell you more about it in the next section).

When starting with Halo2, keep in mind that there are two flavors of the framework out there: the vanilla one maintained by ZCash, and the fork by Ethereum's Privacy and Scaling Explorations team which uses a different polynomial commitment (KZG instead of IPA) that's more friendly for Ethereum.