Awesome HALO2

A community-maintained list of halo2-related resources. Feel free to PR.

Join the community Discord at: https://discord.gg/GEJX7SfEuh

Also check the fantastic https://halo2.club coordinated by @therealyingtong

Protocol

• ZCash Rust implementation
• PSE's halo2 version with KZG instead IPA
• halo2-ce
• The halo2 book

Projects

• Zcash Protocol NU5: Orchard
• Ethereum Foundation zkEVM
• Scroll zkEVM
• Taiko zkEVM
• Deep Learning in Halo 2
• DarkFi zk assembler and VM
• Eigen Trust - A distributed reputation system
• Axiom Zk processor - provides smart contracts trustless access to historic on-chain data and arbitrary expressive compute
• DelphinusLab's zkWASM
• Proof of solvency

Gadgets

• ECC's Halo2 gadgets includes Sinsemilla, Similla ECC, SHA256, Poseidon
• PSE's halo2wrong includes field emulation, generic ECC & ECDSA
• PSE's pairings
• Scrolltech Halo2 aggregator
• Semaphore
• DarkFi Halo2 gadgets includes arithmetic, comparisons, and range checks
• nikkolasg's Verkle tree
• DrPeterVanNostrand's Merkle tree
• RSA verification circuit
• halo2-lib, a library of basic gadgets for halo2 development
• verifiable encryption based of the hashed ElGamal scheme
• DelphinusLab's BN256 and BLS12-381 pairings
• FRI verifier
• Rate limit nullifier
• halo2-utils

Educational

• Orbis Labs' TinyRAM implementation
• Halo and more: exploring incremental verification and SNARKs without pairings
• Sin7Y, Halo Principle Explained
• Sin7Y, Sin7Y Tech Review: Develop Circuits Using Halo 2
• Darkrenaissance's sage implementation
• ZK Meetup Seoul, Deep dive on Halo2 2020
• Zcash: Halo 2 and SNARKs without Trusted Setups 2021
• ZK7: Latest developments in Halo2 2022
• Halo2 tutorial source
• Building a Zero Knowledge web app with Halo 2 and Wasm

Others

• Arithmetization of Functional Program Execution via Interaction Nets in Halo 2
• Arithmetization of ∑¹₁ Relations in Halo 2
• Zordle is Wordle, but with zero-knowledge proofs, uses wasm
• Hammster proves Hamming distance in zk, also uses wasm
• Vocdoni anonymous voting (wasm)
• Sice HALO2 is PLONK-based see awesome-plonk
• Zkbitcoin halo2 test suite, uses wasm