diff --git a/dataavailability/ethda/ethda.go b/dataavailability/ethda/ethda.go
index 056ebc4760..b704183047 100644
--- a/dataavailability/ethda/ethda.go
+++ b/dataavailability/ethda/ethda.go
@@ -6,6 +6,8 @@ import (
 	"fmt"
 	blobutils "github.com/crustio/blob-utils"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
+	solsha3 "github.com/miguelmota/go-solidity-sha3"
 	"math/big"
 )
 
@@ -55,7 +57,25 @@ func (d *EthdaBackend) PostSequence(ctx context.Context, batchesData [][]byte) (
 		hashes = append(hashes, hash.Bytes()...)
 	}
 
-	return hashes, nil
+	currentHash := common.Hash{}.Bytes()
+	for _, batchData := range batchesData {
+		types := []string{
+			"bytes32",
+			"bytes32",
+		}
+		values := []interface{}{
+			currentHash,
+			crypto.Keccak256(batchData),
+		}
+		currentHash = solsha3.SoliditySHA3(types, values)
+	}
+
+	sig, err := d.ethdaClient.SignBatchHash(common.BytesToHash(currentHash))
+	if err != nil {
+		return nil, err
+	}
+
+	return append(sig, hashes...), nil
 }
 
 func (d *EthdaBackend) GetSequence(ctx context.Context, batchHashes []common.Hash, dataAvailabilityMessage []byte) ([][]byte, error) {
@@ -64,8 +84,8 @@ func (d *EthdaBackend) GetSequence(ctx context.Context, batchHashes []common.Has
 	}
 
 	var data [][]byte
-	for i := 0; i < len(dataAvailabilityMessage)/common.HashLength; i++ {
-		start := common.HashLength * i
+	for i := 0; i < (len(dataAvailabilityMessage)-crypto.SignatureLength)/common.HashLength; i++ {
+		start := common.HashLength*i + crypto.SignatureLength
 		hash := common.BytesToHash(dataAvailabilityMessage[start : start+common.HashLength])
 
 		r, err := d.ethdaClient.GetBlob(hash)
diff --git a/go.mod b/go.mod
index 094a2e1e4d..bf68ccc9a6 100644
--- a/go.mod
+++ b/go.mod
@@ -60,7 +60,7 @@ require (
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/crate-crypto/go-ipa v0.0.0-20231025140028-3c0104f4b233 // indirect
 	github.com/crate-crypto/go-kzg-4844 v0.7.0 // indirect
-	github.com/crustio/blob-utils v0.2.1 // indirect
+	github.com/crustio/blob-utils v0.3.1 // indirect
 	github.com/cyphar/filepath-securejoin v0.2.4 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/deckarep/golang-set/v2 v2.1.0 // indirect
diff --git a/go.sum b/go.sum
index c1ff481707..cb96ee05d0 100644
--- a/go.sum
+++ b/go.sum
@@ -167,6 +167,10 @@ github.com/crustio/blob-utils v0.2.0 h1:cDBcKSbo160Ty6rX+jafCwK3Bhh7wfpjyKcE/c+E
 github.com/crustio/blob-utils v0.2.0/go.mod h1:7BcdCxXDgJ2xPNRLgVxlBXQ3eWZ0oFTcwZ+h3dpj58g=
 github.com/crustio/blob-utils v0.2.1 h1:kDiV8kPjyyjzIk64ezB6VN+H6fbtK9eAUcSmF94RJ5M=
 github.com/crustio/blob-utils v0.2.1/go.mod h1:d0x/5NSSocyvkRXkVJUnRGsB3EkZ0YuI/Nn8wN4l44g=
+github.com/crustio/blob-utils v0.3.0 h1:7Uh7FmZQLZFcacfmqZhV2Z5J6P88CeLoSwtoBcLRvsE=
+github.com/crustio/blob-utils v0.3.0/go.mod h1:d0x/5NSSocyvkRXkVJUnRGsB3EkZ0YuI/Nn8wN4l44g=
+github.com/crustio/blob-utils v0.3.1 h1:T++x9rKRqB7mlQp9nZpfadQd0UvKH6zMgV1695EvkUE=
+github.com/crustio/blob-utils v0.3.1/go.mod h1:d0x/5NSSocyvkRXkVJUnRGsB3EkZ0YuI/Nn8wN4l44g=
 github.com/cyphar/filepath-securejoin v0.2.4 h1:Ugdm7cg7i6ZK6x3xDF1oEu1nfkyfH53EtKeQYTC3kyg=
 github.com/cyphar/filepath-securejoin v0.2.4/go.mod h1:aPGpWjXOXUn2NCNjFvBE6aRxGGx79pTxQpKOJNYHHl4=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=