gnark_ptau

README

gnark-ptau

Golang library + utility for converting from SnarkJS ptau files to a gnark kzg.SRS.

Usage

1. Generate or download a .ptau file using the SnarkJS instructions.
2. Install ptau2gnark:

   go install github.com/mdehoog/gnark-ptau/cmd/ptau2gnark@latest
   

3. Convert the .ptau file to a gnark kzg.SRS:

   ptau2gnark <path to .ptau file> <path to output .srs file>
   

4. Use the kzg.SRS in your gnark circuit:

   var k kzg.SRS
   srs, _ := os.Open("<path to output .srs file>")
   _, err = k.ReadFrom(srs)
   

Documentation

Index

• func ToSRS(reader io.Reader) (*kzg.SRS, error)

Functions

func ToSRS

func ToSRS(reader io.Reader) (*kzg.SRS, error)

ToSRS converts a SnarkJS PTAU file to a Gnark bn254 KZG SRS.

See https://github.com/iden3/snarkjs/blob/e44656d9e7b451250038211e44c1a7d80dd76b89/src/powersoftau_new.js#L20-L66.