logos-storage/gnark-plonky2-verifier
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Fixed underconstrained in range check and added dummy mode to benchmark.go

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This commit is contained in:
Uma Roy 2023-10-11 00:28:20 -07:00
parent e026e73359
commit d8b919a403
2 changed files with 26 additions and 3 deletions
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19
benchmark.go
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@ -40,7 +40,7 @@ func (circuit *BenchmarkPlonky2VerifierCircuit) Define(api frontend.API) error {
return nil
}
func compileCircuit(plonky2Circuit string, profileCircuit bool, serialize bool, outputSolidity bool) (constraint.ConstraintSystem, groth16.ProvingKey, groth16.VerifyingKey) {
func compileCircuit(plonky2Circuit string, profileCircuit bool, serialize bool, outputSolidity bool, dummy bool) (constraint.ConstraintSystem, groth16.ProvingKey, groth16.VerifyingKey) {
circuit := BenchmarkPlonky2VerifierCircuit{
plonky2CircuitName: plonky2Circuit,
}
@ -76,9 +76,17 @@ func compileCircuit(plonky2Circuit string, profileCircuit bool, serialize bool,
fR1CS.Close()
}
*/
var pk groth16.ProvingKey
var vk groth16.VerifyingKey
fmt.Println("Running circuit setup", time.Now())
pk, vk, err := groth16.Setup(r1cs)
if dummy {
fmt.Println("Using dummy setup")
pk, err = groth16.DummySetup(r1cs)
} else {
fmt.Println("Using real setup")
pk, vk, err = groth16.Setup(r1cs)
}
if err != nil {
fmt.Println(err)
os.Exit(1)
@ -132,6 +140,11 @@ func createProof(plonky2Circuit string, r1cs constraint.ConstraintSystem, pk gro
fProof.Close()
}
if vk == nil {
fmt.Println("vk is nil, means you're using dummy setup and we skip verification step")
return proof
}
fmt.Println("Verifying proof", time.Now())
err = groth16.Verify(proof, vk, publicWitness)
if err != nil {
@ -187,6 +200,6 @@ func main() {
os.Exit(1)
}
r1cs, pk, vk := compileCircuit(*plonky2Circuit, *profileCircuit, *serialize, *outputSolidity)
r1cs, pk, vk := compileCircuit(*plonky2Circuit, *profileCircuit, *serialize, *outputSolidity, true)
createProof(*plonky2Circuit, r1cs, pk, vk, *serialize)
}

10
goldilocks/base.go
View File

@ -323,8 +323,18 @@ func (p *GoldilocksApi) RangeCheck(x GoldilocksVariable) {
panic(err)
}
// We check that this is a valid decomposition of the Goldilock's element and range-check each limb.
mostSigBits := result[0]
leastSigBits := result[1]
p.api.AssertIsEqual(
p.api.Add(
p.api.Mul(mostSigBits, uint64(math.Pow(2, 32))),
leastSigBits,
),
x.Limb,
)
rangeChecker.Check(mostSigBits, 32)
rangeChecker.Check(leastSigBits, 32)
// If the most significant bits are all 1, then we need to check that the least significant bits are all zero
// in order for element to be less than the Goldilock's modulus.