feat: add kZGToVersionedHash

Author: davidtaikocha

driver/txlist_fetcher/blob.go

@@ -2,15 +2,21 @@ package txlistdecoder
 
 import (
 	"context"
+	"crypto/sha256"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/crypto/kzg4844"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/taikoxyz/taiko-client/bindings"
 	"github.com/taikoxyz/taiko-client/pkg/rpc"
 )
 
+const (
+	blobCommitmentVersionKZG uint8 = 0x01 // Version byte for the point evaluation precompile.
+)
+
 type BlobFetcher struct {
 	rpc *rpc.Client
 }
@@ -38,10 +44,20 @@ func (d *BlobFetcher) Fetch(
 	for _, sidecar := range sidecars {
 		log.Info("Found sidecar", "KzgCommitment", sidecar.KzgCommitment, "blobHash", common.Bytes2Hex(meta.BlobHash[:]))
 
-		if sidecar.KzgCommitment == common.Bytes2Hex(meta.BlobHash[:]) {
+		if kZGToVersionedHash(
+			kzg4844.Commitment(common.Hex2Bytes(sidecar.KzgCommitment)[:]),
+		) == common.BytesToHash(meta.BlobHash[:]) {
 			return common.Hex2Bytes(sidecar.Blob), nil
 		}
 	}
 
 	return nil, errSidecarNotFound
 }
+
+// kZGToVersionedHash implements kzg_to_versioned_hash from EIP-4844
+func kZGToVersionedHash(kzg kzg4844.Commitment) common.Hash {
+	h := sha256.Sum256(kzg[:])
+	h[0] = blobCommitmentVersionKZG
+
+	return h
+}

go.sum

@@ -997,6 +997,9 @@ github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d h1:vfofYNRScrDd
 github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d/go.mod h1:RRCYJbIwD5jmqPI9XoAFR0OcDxqUctll6zUj/+B4S48=
 github.com/taikoxyz/taiko-geth v0.0.0-20240207045737-1f775750a248 h1:biOi7poktBhAsrkxrvO3Sczs8L6OyvBFtt7lUxdwe7A=
 github.com/taikoxyz/taiko-geth v0.0.0-20240207045737-1f775750a248/go.mod h1:gFtlVORuUcT+UUIcJ/veCNjkuOSujCi338uSHJrYAew=
+github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
+github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161/go.mod h1:wM7WEvslTq+iOEAMDLSzhVuOt5BRZ05WirO+b09GHQU=
+github.com/templexxx/xor v0.0.0-20191217153810-f85b25db303b/go.mod h1:5XA7W9S6mni3h5uvOC75dA3m9CCCaS83lltmc0ukdi4=
 github.com/thomaso-mirodin/intmath v0.0.0-20160323211736-5dc6d854e46e h1:cR8/SYRgyQCt5cNCMniB/ZScMkhI9nk8U5C7SbISXjo=
 github.com/thomaso-mirodin/intmath v0.0.0-20160323211736-5dc6d854e46e/go.mod h1:Tu4lItkATkonrYuvtVjG0/rhy15qrNGNTjPdaphtZ/8=
 github.com/tjfoc/gmsm v1.3.0/go.mod h1:HaUcFuY0auTiaHB9MHFGCPx5IaLhTUd2atbCFBQXn9w=