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circuit3.go
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package main
import (
"math/big"
"github.com/consensys/gnark/backend/groth16"
"github.com/consensys/gnark/backend/witness"
"github.com/consensys/gnark/constraint"
"github.com/consensys/gnark/frontend"
"github.com/consensys/gnark/frontend/cs/r1cs"
"github.com/consensys/gnark/std/hash/mimc"
stdgroth16 "github.com/consensys/gnark/std/recursion/groth16"
)
type Circuit3 struct {
// public parameters
X1 frontend.Variable `gnark:",public"`
X2 frontend.Variable `gnark:",public"`
X3 frontend.Variable `gnark:",public"`
X4 frontend.Variable `gnark:",public"`
X5 frontend.Variable `gnark:",public"`
X6 frontend.Variable `gnark:",public"`
X7 frontend.Variable `gnark:",public"`
X8 frontend.Variable `gnark:",public"`
X9 frontend.Variable `gnark:",public"`
X10 frontend.Variable `gnark:",public"`
X11 frontend.Variable `gnark:",public"`
X12 frontend.Variable `gnark:",public"`
X13 frontend.Variable `gnark:",public"`
X14 frontend.Variable `gnark:",public"`
X15 frontend.Variable `gnark:",public"`
// secret parameters
W1 frontend.Variable
W2 frontend.Variable
W3 frontend.Variable
W4 frontend.Variable
W5 frontend.Variable
W6 frontend.Variable
W7 frontend.Variable
W8 frontend.Variable
W9 frontend.Variable
W10 frontend.Variable
W11 frontend.Variable
W12 frontend.Variable
W13 frontend.Variable
W14 frontend.Variable
W15 frontend.Variable
}
func (c *Circuit3) Define(api frontend.API) error {
// hash function
hfunc, _ := mimc.NewMiMC(api)
//calculate hash
hfunc.Write(c.W1)
api.AssertIsEqual(c.X1, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W2)
api.AssertIsEqual(c.X2, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W3)
api.AssertIsEqual(c.X3, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W4)
api.AssertIsEqual(c.X4, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W5)
api.AssertIsEqual(c.X5, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W6)
api.AssertIsEqual(c.X6, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W7)
api.AssertIsEqual(c.X7, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W8)
api.AssertIsEqual(c.X8, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W9)
api.AssertIsEqual(c.X9, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W10)
api.AssertIsEqual(c.X10, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W11)
api.AssertIsEqual(c.X11, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W12)
api.AssertIsEqual(c.X12, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W13)
api.AssertIsEqual(c.X13, hfunc.Sum())
hfunc.Reset()
hfunc.Write(c.W14)
api.AssertIsEqual(c.X14, hfunc.Sum())
hfunc.Reset()
//loop of adding 1 to W15 10000 times then check if it is equal to X15
for i := 0; i < 500; i++ {
hfunc.Write(c.W15)
c.W15 = hfunc.Sum()
hfunc.Reset()
}
api.AssertIsEqual(c.X15, c.W15)
return nil
}
func ComputeProofC3(field, outer *big.Int, assignment *Circuit3, bn254 bool) (constraint.ConstraintSystem, groth16.VerifyingKey, witness.Witness, groth16.Proof) {
innerCcs, err := frontend.Compile(field, r1cs.NewBuilder, &Circuit3{})
if err != nil {
panic(err)
}
innerPK, innerVK, err := groth16.Setup(innerCcs)
if err != nil {
panic(err)
}
innerWitness, err := frontend.NewWitness(assignment, field)
if err != nil {
panic(err)
}
var innerProof groth16.Proof
if bn254 {
innerProof, err = groth16.Prove(innerCcs, innerPK, innerWitness)
} else {
innerProof, err = groth16.Prove(innerCcs, innerPK, innerWitness, stdgroth16.GetNativeProverOptions(outer, field))
}
if err != nil {
panic(err)
}
innerPubWitness, err := innerWitness.Public()
if err != nil {
panic(err)
}
return innerCcs, innerVK, innerPubWitness, innerProof
}