main.go

package main

import (
	"time"

	"github.com/consensys/gnark-crypto/ecc"
	"github.com/consensys/gnark/backend/groth16"
	"github.com/consensys/gnark/frontend"
	"github.com/consensys/gnark/frontend/cs/r1cs"
	rln "github.com/rymnc/gnark-rln/rln"
)

func main() {
	identityPathIndex := [20]frontend.Variable{
		1,
		1,
		1,
		0,
		1,
		0,
		1,
		0,
		1,
		0,
		1,
		0,
		0,
		0,
		0,
		0,
		1,
		1,
		1,
		0,
	}

	cs, err := frontend.Compile(ecc.BN254.ScalarField(), r1cs.NewBuilder, &rln.RlnCircuit{})
	if err != nil {
		panic(err)
	}

	pk, vk, err := groth16.Setup(cs)
	if err != nil {
		panic(err)
	}

	assignment := &rln.RlnCircuit{
		X:                 frontend.Variable(rln.GetBn254X()),
		ExternalNullifier: frontend.Variable(rln.GetBn254ExternalNullifier()),
		IdentitySecret:    frontend.Variable(rln.GetBn254IdentitySecret()),
		MessageId:         frontend.Variable(1),
		UserMessageLimit:  frontend.Variable(100),
		PathElements:      rln.GetBn254PathElements(),
		IdentityPathIndex: identityPathIndex,
		Y:                 frontend.Variable(rln.GetBn254Y()),
		Root:              frontend.Variable(rln.GetBn254Root()),
		Nullifier:         frontend.Variable(rln.GetBn254Nullifier()),
	}

	witness, _ := frontend.NewWitness(assignment, ecc.BN254.ScalarField())

	startTime := time.Now().UnixMilli()
	proof, err := groth16.Prove(cs, pk, witness)
	endTime := time.Now().UnixMilli()
	elapsed := endTime - startTime
	print("Proving time: ", elapsed, "ms.\n")
	if err != nil {
		panic(err)
	}

	verifyWitness, err := frontend.NewWitness(assignment, ecc.BN254.ScalarField(), frontend.PublicOnly())
	if err != nil {
		panic(err)
	}

	startTime = time.Now().UnixMilli()
	err = groth16.Verify(proof, vk, verifyWitness)
	endTime = time.Now().UnixMilli()
	elapsed = endTime - startTime
	print("Verification time: ", elapsed, "ms.\n")

	if err != nil {
		print(err.Error())
	}
}