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package plonk_test | ||
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import ( | ||
"bytes" | ||
"math/big" | ||
"testing" | ||
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"github.com/consensys/gnark" | ||
"github.com/consensys/gnark-crypto/ecc" | ||
"github.com/consensys/gnark-crypto/kzg" | ||
"github.com/consensys/gnark/backend/plonk" | ||
"github.com/consensys/gnark/constraint" | ||
"github.com/consensys/gnark/frontend" | ||
"github.com/consensys/gnark/frontend/cs/scs" | ||
"github.com/consensys/gnark/test" | ||
"github.com/stretchr/testify/require" | ||
) | ||
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//--------------------// | ||
// benches // | ||
//--------------------// | ||
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func TestProver(t *testing.T) { | ||
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for _, curve := range getCurves() { | ||
t.Run(curve.String(), func(t *testing.T) { | ||
var b1, b2 bytes.Buffer | ||
assert := require.New(t) | ||
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ccs, _solution, srs := referenceCircuit(curve) | ||
fullWitness, err := frontend.NewWitness(_solution, curve.ScalarField()) | ||
assert.NoError(err) | ||
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publicWitness, err := fullWitness.Public() | ||
assert.NoError(err) | ||
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pk, vk, err := plonk.Setup(ccs, srs) | ||
assert.NoError(err) | ||
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// write the PK to ensure it is not mutated | ||
_, err = pk.WriteTo(&b1) | ||
assert.NoError(err) | ||
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proof, err := plonk.Prove(ccs, pk, fullWitness) | ||
assert.NoError(err) | ||
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// check pk | ||
_, err = pk.WriteTo(&b2) | ||
assert.NoError(err) | ||
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assert.True(bytes.Equal(b1.Bytes(), b2.Bytes()), "plonk prover mutated the proving key") | ||
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err = plonk.Verify(proof, vk, publicWitness) | ||
assert.NoError(err) | ||
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}) | ||
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} | ||
} | ||
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func BenchmarkSetup(b *testing.B) { | ||
for _, curve := range getCurves() { | ||
b.Run(curve.String(), func(b *testing.B) { | ||
ccs, _, srs := referenceCircuit(curve) | ||
b.ResetTimer() | ||
for i := 0; i < b.N; i++ { | ||
_, _, _ = plonk.Setup(ccs, srs) | ||
} | ||
}) | ||
} | ||
} | ||
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func BenchmarkProver(b *testing.B) { | ||
for _, curve := range getCurves() { | ||
b.Run(curve.String(), func(b *testing.B) { | ||
ccs, _solution, srs := referenceCircuit(curve) | ||
fullWitness, err := frontend.NewWitness(_solution, curve.ScalarField()) | ||
if err != nil { | ||
b.Fatal(err) | ||
} | ||
pk, _, err := plonk.Setup(ccs, srs) | ||
if err != nil { | ||
b.Fatal(err) | ||
} | ||
b.ResetTimer() | ||
for i := 0; i < b.N; i++ { | ||
_, _ = plonk.Prove(ccs, pk, fullWitness) | ||
} | ||
}) | ||
} | ||
} | ||
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func BenchmarkVerifier(b *testing.B) { | ||
for _, curve := range getCurves() { | ||
b.Run(curve.String(), func(b *testing.B) { | ||
ccs, _solution, srs := referenceCircuit(curve) | ||
fullWitness, err := frontend.NewWitness(_solution, curve.ScalarField()) | ||
if err != nil { | ||
b.Fatal(err) | ||
} | ||
publicWitness, err := fullWitness.Public() | ||
if err != nil { | ||
b.Fatal(err) | ||
} | ||
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pk, vk, err := plonk.Setup(ccs, srs) | ||
if err != nil { | ||
b.Fatal(err) | ||
} | ||
proof, err := plonk.Prove(ccs, pk, fullWitness) | ||
if err != nil { | ||
panic(err) | ||
} | ||
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b.ResetTimer() | ||
for i := 0; i < b.N; i++ { | ||
_ = plonk.Verify(proof, vk, publicWitness) | ||
} | ||
}) | ||
} | ||
} | ||
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type refCircuit struct { | ||
nbConstraints int | ||
X frontend.Variable | ||
Y frontend.Variable `gnark:",public"` | ||
} | ||
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func (circuit *refCircuit) Define(api frontend.API) error { | ||
for i := 0; i < circuit.nbConstraints; i++ { | ||
circuit.X = api.Mul(circuit.X, circuit.X) | ||
} | ||
api.AssertIsEqual(circuit.X, circuit.Y) | ||
return nil | ||
} | ||
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func referenceCircuit(curve ecc.ID) (constraint.ConstraintSystem, frontend.Circuit, kzg.SRS) { | ||
const nbConstraints = 40000 | ||
circuit := refCircuit{ | ||
nbConstraints: nbConstraints, | ||
} | ||
ccs, err := frontend.Compile(curve.ScalarField(), scs.NewBuilder, &circuit) | ||
if err != nil { | ||
panic(err) | ||
} | ||
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var good refCircuit | ||
good.X = 2 | ||
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// compute expected Y | ||
expectedY := new(big.Int).SetUint64(2) | ||
exp := big.NewInt(1) | ||
exp.Lsh(exp, nbConstraints) | ||
expectedY.Exp(expectedY, exp, curve.ScalarField()) | ||
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good.Y = expectedY | ||
srs, err := test.NewKZGSRS(ccs) | ||
if err != nil { | ||
panic(err) | ||
} | ||
return ccs, &good, srs | ||
} | ||
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func getCurves() []ecc.ID { | ||
if testing.Short() { | ||
return []ecc.ID{ecc.BN254} | ||
} | ||
return gnark.Curves() | ||
} |
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