RailgunRailgun

Circuit-specific Phase 2 trusted setup for Railgun’s 54 Groth16 circuits (parameterised by transaction input/output counts) over the BN254 curve. It builds on the Polygon zkEVM ceremony https://github.com/iden3/snarkjs/tree/master?tab=readme-ov-file as phase 1, which contains 55 participants.

A separate Phase 2 ceremony was publicly announced, open to anonymous and identified participants, and wrapped up in late December 2022.

Verified against the ceremony artifact IPFS hash QmWAySHYhaZqioKi1ufrPJC1n1ZVtHP2w4hLA9XqqJCFne: the /contributors directory contains 328 sequentially-numbered attestation files with GitHub or Twitter handles, and the /zkeys directory contains 54 final zkey files (one per circuit). Parsing the final zkey binary for the 1x1 circuit shows 304 Phase 2 contributions on that circuit.

• Phase 1 ceremony: https://github.com/iden3/snarkjs/tree/master?tab=readme-ov-file.
• Ceremony artifacts on IPFS: https://ipfs.io/ipfs/QmWAySHYhaZqioKi1ufrPJC1n1ZVtHP2w4hLA9XqqJCFne
• Ceremony announcement: https://medium.com/@Railgun_Project/railgun-project-begins-setup-ceremony-with-an-emphasis-on-security-d1c63117c312
• Advanced Circuit ceremony user guide: https://medium.com/@Railgun_Project/railgun-advanced-circuit-setup-ceremony-user-guide-32361c54242
• Docs overview of the trusted setup: https://docs.railgun.org/wiki/learn/privacy-system/trusted-setup-ceremony
• Railgun circuits repository with ceremony scripts: https://github.com/Railgun-Privacy/circuits-v2