circomlib VS halo2

I found Circom to be the best language to start learning ZKPs, as suggested by CyberPorter. To me, Circom has the ideal level of abstraction for learning: not too high level that it abstracts away some of the quirks of ZKP, and not too low level that you get bogged down in annoying details. It also has been around for quite some time (modulo how new everything ZK is!), so you can find more documentation and samples, as well as the awesome Circom workshops from 0xparc. Last but not least, there is circomlib, a library of common building blocks for Circom.

The other thing we need is the circomlib. Circomlib is a programming library with many useful predefined circuits. So, create an empty project, and install circomlib using this code:

[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