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Check kzg commitment for beacon-api propose block (#14702)

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Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>
This commit is contained in:
terence
2024-12-09 06:38:28 -08:00
committed by GitHub
parent df81fa3e9a
commit 92bbf6344c
8 changed files with 122 additions and 53 deletions
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41
beacon-chain/blockchain/kzg/validation_test.go
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@@ -1,51 +1,14 @@
package kzg
import (
"bytes"
"crypto/sha256"
"encoding/binary"
"testing"
"github.com/consensys/gnark-crypto/ecc/bls12-381/fr"
GoKZG "github.com/crate-crypto/go-kzg-4844"
"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
"github.com/prysmaticlabs/prysm/v5/testing/require"
"github.com/sirupsen/logrus"
"github.com/prysmaticlabs/prysm/v5/testing/util"
)
func deterministicRandomness(seed int64) [32]byte {
// Converts an int64 to a byte slice
buf := new(bytes.Buffer)
err := binary.Write(buf, binary.BigEndian, seed)
if err != nil {
logrus.WithError(err).Error("Failed to write int64 to bytes buffer")
return [32]byte{}
}
bytes := buf.Bytes()
return sha256.Sum256(bytes)
}
// Returns a serialized random field element in big-endian
func GetRandFieldElement(seed int64) [32]byte {
bytes := deterministicRandomness(seed)
var r fr.Element
r.SetBytes(bytes[:])
return GoKZG.SerializeScalar(r)
}
// Returns a random blob using the passed seed as entropy
func GetRandBlob(seed int64) GoKZG.Blob {
var blob GoKZG.Blob
bytesPerBlob := GoKZG.ScalarsPerBlob * GoKZG.SerializedScalarSize
for i := 0; i < bytesPerBlob; i += GoKZG.SerializedScalarSize {
fieldElementBytes := GetRandFieldElement(seed + int64(i))
copy(blob[i:i+GoKZG.SerializedScalarSize], fieldElementBytes[:])
}
return blob
}
func GenerateCommitmentAndProof(blob GoKZG.Blob) (GoKZG.KZGCommitment, GoKZG.KZGProof, error) {
commitment, err := kzgContext.BlobToKZGCommitment(blob, 0)
if err != nil {
@@ -74,7 +37,7 @@ func TestBytesToAny(t *testing.T) {
}
func TestGenerateCommitmentAndProof(t *testing.T) {
blob := GetRandBlob(123)
blob := util.GetRandBlob(123)
commitment, proof, err := GenerateCommitmentAndProof(blob)
require.NoError(t, err)
expectedCommitment := GoKZG.KZGCommitment{180, 218, 156, 194, 59, 20, 10, 189, 186, 254, 132, 93, 7, 127, 104, 172, 238, 240, 237, 70, 83, 89, 1, 152, 99, 0, 165, 65, 143, 62, 20, 215, 230, 14, 205, 95, 28, 245, 54, 25, 160, 16, 178, 31, 232, 207, 38, 85}