diff --git a/core/rawdb/accessors_chain_test.go b/core/rawdb/accessors_chain_test.go
index 0a71d7a60..a19c25183 100644
--- a/core/rawdb/accessors_chain_test.go
+++ b/core/rawdb/accessors_chain_test.go
@@ -59,7 +59,7 @@ func TestHeaderStorage(t *testing.T) {
 	woBody := types.EmptyWorkObjectBody()
 	woBody.SetHeader(header)
 
-	woHeader := types.NewWorkObjectHeader(header.Hash(), common.Hash{1}, big.NewInt(1), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{1}, common.Location{0, 0}))
+	woHeader := types.NewWorkObjectHeader(header.Hash(), common.Hash{1}, big.NewInt(1), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{1}, common.Location{0, 0}), []byte{0, 1, 2, 3})
 
 	wo := types.NewWorkObject(woHeader, woBody, nil)
 
@@ -190,7 +190,7 @@ func TestPbCacheStorage(t *testing.T) {
 	woBody := types.EmptyWorkObjectBody()
 	woBody.SetHeader(types.EmptyHeader())
 
-	woHeader := types.NewWorkObjectHeader(types.EmptyRootHash, types.EmptyRootHash, big.NewInt(11), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{1}, common.Location{0, 0}))
+	woHeader := types.NewWorkObjectHeader(types.EmptyRootHash, types.EmptyRootHash, big.NewInt(11), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{1}, common.Location{0, 0}), []byte{0, 1, 2, 3})
 	wo := types.NewWorkObject(woHeader, woBody, nil)
 	WritePbCacheBody(db, common.Hash{1}, wo)
 
@@ -320,7 +320,7 @@ func TestBlockHashesIterator(t *testing.T) {
 			blockHeader := types.EmptyHeader()
 			blockBody := types.EmptyWorkObjectBody()
 			blockBody.SetHeader(blockHeader)
-			blockWoHeader := types.NewWorkObjectHeader(blockHeader.Hash(), types.EmptyHash, big.NewInt(int64(i+1)), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 2, common.Location{0, byte(j)}, common.BytesToAddress([]byte{1}, common.Location{0, byte(j)}))
+			blockWoHeader := types.NewWorkObjectHeader(blockHeader.Hash(), types.EmptyHash, big.NewInt(int64(i+1)), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 2, common.Location{0, byte(j)}, common.BytesToAddress([]byte{1}, common.Location{0, byte(j)}), []byte{0, 1, 2, 3})
 			block := types.NewWorkObject(blockWoHeader, blockBody, nil)
 			WriteWorkObject(db, block.Hash(), block, types.BlockObject, common.ZONE_CTX)
 			hashes[i][block.Hash()] = true
@@ -345,7 +345,7 @@ func TestCommonAncestor(t *testing.T) {
 	regionHeader.SetNumber(big.NewInt(1), common.REGION_CTX)
 	regionBody := types.EmptyWorkObjectBody()
 	regionBody.SetHeader(regionHeader)
-	regionWoHeader := types.NewWorkObjectHeader(regionHeader.Hash(), types.EmptyRootHash, big.NewInt(1), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.Location{0}, common.BytesToAddress([]byte{0}, common.Location{0, 0}))
+	regionWoHeader := types.NewWorkObjectHeader(regionHeader.Hash(), types.EmptyRootHash, big.NewInt(1), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.Location{0}, common.BytesToAddress([]byte{0}, common.Location{0, 0}), []byte{0, 1, 2, 3})
 	regionBlock := types.NewWorkObject(regionWoHeader, regionBody, nil)
 	WriteWorkObject(db, regionBlock.Hash(), regionBlock, types.BlockObject, common.REGION_CTX)
 
@@ -353,7 +353,7 @@ func TestCommonAncestor(t *testing.T) {
 	zone0Header := types.EmptyHeader()
 	zone0Body := types.EmptyWorkObjectBody()
 	zone0Body.SetHeader(zone0Header)
-	zone0WoHeader := types.NewWorkObjectHeader(zone0Header.Hash(), regionBlock.Hash(), big.NewInt(2), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 2, common.Location{0, 0}, common.BytesToAddress([]byte{0}, common.Location{0, 0}))
+	zone0WoHeader := types.NewWorkObjectHeader(zone0Header.Hash(), regionBlock.Hash(), big.NewInt(2), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 2, common.Location{0, 0}, common.BytesToAddress([]byte{0}, common.Location{0, 0}), []byte{0, 1, 2, 3})
 	zone0Block := types.NewWorkObject(zone0WoHeader, zone0Body, nil)
 	WriteWorkObject(db, zone0Block.Hash(), zone0Block, types.BlockObject, common.ZONE_CTX)
 
@@ -361,14 +361,14 @@ func TestCommonAncestor(t *testing.T) {
 	zone1Header1 := types.EmptyHeader()
 	zone1Body1 := types.EmptyWorkObjectBody()
 	zone1Body1.SetHeader(zone1Header1)
-	zone1WoHeader1 := types.NewWorkObjectHeader(zone1Header1.Hash(), regionBlock.Hash(), big.NewInt(2), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 2, common.Location{0, 1}, common.BytesToAddress([]byte{0}, common.Location{0, 1}))
+	zone1WoHeader1 := types.NewWorkObjectHeader(zone1Header1.Hash(), regionBlock.Hash(), big.NewInt(2), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 2, common.Location{0, 1}, common.BytesToAddress([]byte{0}, common.Location{0, 1}), []byte{0, 1, 2, 3})
 	zone1Block1 := types.NewWorkObject(zone1WoHeader1, zone1Body1, nil)
 	WriteWorkObject(db, zone1Block1.Hash(), zone1Block1, types.BlockObject, common.ZONE_CTX)
 
 	zone1Header2 := types.EmptyHeader()
 	zone1Body2 := types.EmptyWorkObjectBody()
 	zone1Body2.SetHeader(zone1Header2)
-	zone1WoHeader2 := types.NewWorkObjectHeader(zone1Header2.Hash(), zone1Block1.Hash(), big.NewInt(3), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 3, common.Location{0, 1}, common.BytesToAddress([]byte{0}, common.Location{0, 1}))
+	zone1WoHeader2 := types.NewWorkObjectHeader(zone1Header2.Hash(), zone1Block1.Hash(), big.NewInt(3), big.NewInt(3000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 3, common.Location{0, 1}, common.BytesToAddress([]byte{0}, common.Location{0, 1}), []byte{0, 1, 2, 3})
 	zone1Block2 := types.NewWorkObject(zone1WoHeader2, zone1Body2, nil)
 	WriteWorkObject(db, zone1Block2.Hash(), zone1Block2, types.BlockObject, common.ZONE_CTX)
 
@@ -588,7 +588,7 @@ func createTestWorkObject() *types.WorkObject {
 	woBody := types.EmptyWorkObjectBody()
 	woBody.SetHeader(types.EmptyHeader())
 
-	woHeader := types.NewWorkObjectHeader(types.EmptyRootHash, types.EmptyRootHash, big.NewInt(11), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{0}, common.Location{0, 0}))
+	woHeader := types.NewWorkObjectHeader(types.EmptyRootHash, types.EmptyRootHash, big.NewInt(11), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{0}, common.Location{0, 0}), []byte{0, 1, 2, 3})
 	return types.NewWorkObject(woHeader, woBody, nil)
 }
 
@@ -742,7 +742,7 @@ func createBlockWithTransactions(txs types.Transactions) *types.WorkObject {
 	woBody := types.EmptyWorkObjectBody()
 	woBody.SetHeader(types.EmptyHeader())
 	woBody.SetTransactions(txs)
-	return types.NewWorkObject(types.NewWorkObjectHeader(types.EmptyRootHash, types.EmptyRootHash, big.NewInt(0), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{0}, common.Location{0, 0})), woBody, nil)
+	return types.NewWorkObject(types.NewWorkObjectHeader(types.EmptyRootHash, types.EmptyRootHash, big.NewInt(0), big.NewInt(30000), big.NewInt(42), types.EmptyRootHash, types.BlockNonce{23}, 1, 1, common.LocationFromAddressBytes([]byte{0x01, 0x01}), common.BytesToAddress([]byte{0}, common.Location{0, 0}), []byte{0, 1, 2, 3}), woBody, nil)
 }
 
 func writeBlockForReceipts(db ethdb.Database, hash common.Hash, txs types.Transactions) {
diff --git a/core/slice.go b/core/slice.go
index 87384b051..28c0c2378 100644
--- a/core/slice.go
+++ b/core/slice.go
@@ -924,6 +924,7 @@ func (sl *Slice) combinePendingHeader(header *types.WorkObject, slPendingHeader
 		combinedPendingHeader.WorkObjectHeader().SetPrimeTerminusNumber(header.PrimeTerminusNumber())
 		combinedPendingHeader.WorkObjectHeader().SetLock(header.Lock())
 		combinedPendingHeader.WorkObjectHeader().SetPrimaryCoinbase(header.PrimaryCoinbase())
+		combinedPendingHeader.WorkObjectHeader().SetData(header.Data())
 
 		combinedPendingHeader.Header().SetEtxRollupHash(header.EtxRollupHash())
 		combinedPendingHeader.Header().SetUncledEntropy(header.Header().UncledEntropy())
diff --git a/core/types/gen_header_json.go b/core/types/gen_header_json.go
index 06ca04f8a..5f541a8f9 100644
--- a/core/types/gen_header_json.go
+++ b/core/types/gen_header_json.go
@@ -335,6 +335,7 @@ func (wh *WorkObjectHeader) MarshalJSON() ([]byte, error) {
 		Nonce      BlockNonce     `json:"nonce" gencoden:"required"`
 		Lock 	   hexutil.Uint64 `json:"lock" gencoden:"required"`
 		PrimaryCoinbase   string `json:"primaryCoinbase" gencoden:"required"`
+		Data hexutil.Bytes       `json:"data" gencoden:"required"`
 	}
 
 	enc.HeaderHash = wh.HeaderHash()
@@ -348,6 +349,7 @@ func (wh *WorkObjectHeader) MarshalJSON() ([]byte, error) {
 	enc.Nonce = wh.Nonce()
 	enc.Lock = hexutil.Uint64(wh.Lock())
 	enc.PrimaryCoinbase = wh.PrimaryCoinbase().Hex()
+	enc.Data = wh.Data()
 
 	raw, err := json.Marshal(&enc)
 	return raw, err
@@ -367,6 +369,7 @@ func (wh *WorkObjectHeader) UnmarshalJSON(input []byte) error {
 		Nonce      BlockNonce      `json:"nonce" gencoden:"required"`
 		Lock 	   hexutil.Uint64  `json:"lock" gencoden:"required"`
 		PrimaryCoinbase   string  `json:"primaryCoinbase" gencoden:"required"`
+		Data hexutil.Bytes        `json:"data" gencoden:"required"`
 	}
 
 	err := json.Unmarshal(input, &dec)
@@ -393,6 +396,7 @@ func (wh *WorkObjectHeader) UnmarshalJSON(input []byte) error {
 		return err
 	}
 	wh.SetPrimaryCoinbase(coinbaseAddr.Address())
+	wh.SetData(dec.Data)
 	return nil
 }
 
@@ -472,4 +476,4 @@ func (wo *WorkObject) UnmarshalJSON(input []byte) error {
 	wo.SetBody(dec.WoBody)
 	wo.SetTx(dec.Tx)
 	return nil
-}
\ No newline at end of file
+}
diff --git a/core/types/proto_block.pb.go b/core/types/proto_block.pb.go
index f1e6fcc2c..2f0e902a5 100644
--- a/core/types/proto_block.pb.go
+++ b/core/types/proto_block.pb.go
@@ -764,6 +764,7 @@ type ProtoWorkObjectHeader struct {
 	PrimeTerminusNumber []byte                `protobuf:"bytes,10,opt,name=prime_terminus_number,json=primeTerminusNumber,proto3,oneof" json:"prime_terminus_number,omitempty"`
 	Lock                *uint32               `protobuf:"varint,11,opt,name=lock,proto3,oneof" json:"lock,omitempty"`
 	PrimaryCoinbase     *common.ProtoAddress  `protobuf:"bytes,12,opt,name=primary_coinbase,json=primaryCoinbase,proto3,oneof" json:"primary_coinbase,omitempty"`
+	Data                []byte                `protobuf:"bytes,13,opt,name=data,proto3" json:"data,omitempty"`
 }
 
 func (x *ProtoWorkObjectHeader) Reset() {
@@ -880,6 +881,13 @@ func (x *ProtoWorkObjectHeader) GetPrimaryCoinbase() *common.ProtoAddress {
 	return nil
 }
 
+func (x *ProtoWorkObjectHeader) GetData() []byte {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
 type ProtoWorkObjectHeaders struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2945,7 +2953,7 @@ var file_core_types_proto_block_proto_rawDesc = []byte{
 	0x12, 0x3c, 0x0a, 0x0d, 0x61, 0x63, 0x63, 0x65, 0x73, 0x73, 0x5f, 0x74, 0x75, 0x70, 0x6c, 0x65,
 	0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x17, 0x2e, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x2e,
 	0x50, 0x72, 0x6f, 0x74, 0x6f, 0x41, 0x63, 0x63, 0x65, 0x73, 0x73, 0x54, 0x75, 0x70, 0x6c, 0x65,
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+	0x52, 0x0c, 0x61, 0x63, 0x63, 0x65, 0x73, 0x73, 0x54, 0x75, 0x70, 0x6c, 0x65, 0x73, 0x22, 0xf2,
 	0x05, 0x0a, 0x15, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x57, 0x6f, 0x72, 0x6b, 0x4f, 0x62, 0x6a, 0x65,
 	0x63, 0x74, 0x48, 0x65, 0x61, 0x64, 0x65, 0x72, 0x12, 0x37, 0x0a, 0x0b, 0x68, 0x65, 0x61, 0x64,
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@@ -2981,297 +2989,299 @@ var file_core_types_proto_block_proto_rawDesc = []byte{
 	0x73, 0x65, 0x18, 0x0c, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f,
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 }
 
 var (
diff --git a/core/types/proto_block.proto b/core/types/proto_block.proto
index 577784fae..c4e208c51 100644
--- a/core/types/proto_block.proto
+++ b/core/types/proto_block.proto
@@ -91,6 +91,7 @@ message ProtoWorkObjectHeader {
   optional bytes prime_terminus_number = 10;
   optional uint32 lock = 11;
   optional common.ProtoAddress primary_coinbase = 12;
+  bytes data = 13;
 }
 
 message ProtoWorkObjectHeaders {
diff --git a/core/types/wo.go b/core/types/wo.go
index 1f8ee0342..43ec33af3 100644
--- a/core/types/wo.go
+++ b/core/types/wo.go
@@ -49,6 +49,7 @@ type WorkObjectHeader struct {
 	mixHash             common.Hash
 	time                uint64
 	nonce               BlockNonce
+	data                []byte
 	lock                uint8
 	PowHash             atomic.Value
 	PowDigest           atomic.Value
@@ -199,6 +200,10 @@ func (wo *WorkObject) PrimaryCoinbase() common.Address {
 	return wo.WorkObjectHeader().PrimaryCoinbase()
 }
 
+func (wo *WorkObject) Data() []byte {
+	return wo.WorkObjectHeader().Data()
+}
+
 func (wo *WorkObject) QuaiCoinbase() (common.Address, error) {
 	// check if the primary coinbase is in Quai ledger
 	quai := wo.PrimaryCoinbase().IsInQuaiLedgerScope()
@@ -601,6 +606,10 @@ func (wh *WorkObjectHeader) Time() uint64 {
 	return wh.time
 }
 
+func (wh *WorkObjectHeader) Data() []byte {
+	return wh.data
+}
+
 ////////////////////////////////////////////////////////////
 /////////////////// Work Object Header Setters ///////////////
 ////////////////////////////////////////////////////////////
@@ -653,6 +662,10 @@ func (wh *WorkObjectHeader) SetTime(val uint64) {
 	wh.time = val
 }
 
+func (wh *WorkObjectHeader) SetData(val []byte) {
+	wh.data = val
+}
+
 type WorkObjectBody struct {
 	header          *Header
 	transactions    Transactions
@@ -852,7 +865,7 @@ func NewWorkObjectBody(header *Header, txs []*Transaction, etxs []*Transaction,
 }
 
 func NewWorkObjectWithHeader(header *WorkObject, tx *Transaction, nodeCtx int, woType WorkObjectView) *WorkObject {
-	woHeader := NewWorkObjectHeader(header.Hash(), header.ParentHash(common.ZONE_CTX), header.WorkObjectHeader().number, header.WorkObjectHeader().difficulty, header.WorkObjectHeader().PrimeTerminusNumber(), header.WorkObjectHeader().txHash, header.WorkObjectHeader().nonce, header.WorkObjectHeader().lock, header.WorkObjectHeader().time, header.Location(), header.PrimaryCoinbase())
+	woHeader := NewWorkObjectHeader(header.Hash(), header.ParentHash(common.ZONE_CTX), header.WorkObjectHeader().number, header.WorkObjectHeader().difficulty, header.WorkObjectHeader().PrimeTerminusNumber(), header.WorkObjectHeader().txHash, header.WorkObjectHeader().nonce, header.WorkObjectHeader().lock, header.WorkObjectHeader().time, header.Location(), header.PrimaryCoinbase(), header.WorkObjectHeader().data)
 	woBody, _ := NewWorkObjectBody(header.Body().Header(), nil, nil, nil, nil, nil, nil, nodeCtx)
 	return NewWorkObject(woHeader, woBody, tx)
 }
@@ -1026,7 +1039,7 @@ func (wo *WorkObject) ProtoDecode(data *ProtoWorkObject, location common.Locatio
 	return nil
 }
 
-func NewWorkObjectHeader(headerHash common.Hash, parentHash common.Hash, number *big.Int, difficulty *big.Int, primeTerminusNumber *big.Int, txHash common.Hash, nonce BlockNonce, lock uint8, time uint64, location common.Location, primaryCoinbase common.Address) *WorkObjectHeader {
+func NewWorkObjectHeader(headerHash common.Hash, parentHash common.Hash, number *big.Int, difficulty *big.Int, primeTerminusNumber *big.Int, txHash common.Hash, nonce BlockNonce, lock uint8, time uint64, location common.Location, primaryCoinbase common.Address, data []byte) *WorkObjectHeader {
 	return &WorkObjectHeader{
 		headerHash:          headerHash,
 		parentHash:          parentHash,
@@ -1039,6 +1052,7 @@ func NewWorkObjectHeader(headerHash common.Hash, parentHash common.Hash, number
 		time:                time,
 		location:            location,
 		primaryCoinbase:     primaryCoinbase,
+		data:                data,
 	}
 }
 
@@ -1056,6 +1070,7 @@ func CopyWorkObjectHeader(wh *WorkObjectHeader) *WorkObjectHeader {
 	cpy.SetPrimeTerminusNumber(wh.primeTerminusNumber)
 	cpy.SetLock(wh.Lock())
 	cpy.SetPrimaryCoinbase(wh.PrimaryCoinbase())
+	cpy.SetData(wh.Data())
 	return &cpy
 }
 
@@ -1073,6 +1088,7 @@ func (wh *WorkObjectHeader) RPCMarshalWorkObjectHeader() map[string]interface{}
 		"mixHash":             wh.MixHash(),
 		"lock":                hexutil.Uint64(wh.Lock()),
 		"primaryCoinbase":     wh.PrimaryCoinbase().Hex(),
+		"data":                wh.Data(),
 	}
 	return result
 }
@@ -1116,6 +1132,7 @@ func (wh *WorkObjectHeader) SealEncode() *ProtoWorkObjectHeader {
 	time := wh.Time()
 	lock := uint32(wh.Lock())
 	coinbase := common.ProtoAddress{Value: wh.PrimaryCoinbase().Bytes()}
+	data := wh.Data()
 
 	return &ProtoWorkObjectHeader{
 		HeaderHash:          &hash,
@@ -1128,6 +1145,7 @@ func (wh *WorkObjectHeader) SealEncode() *ProtoWorkObjectHeader {
 		Lock:                &lock,
 		PrimaryCoinbase:     &coinbase,
 		Time:                &time,
+		Data:                data,
 	}
 }
 
@@ -1143,6 +1161,7 @@ func (wh *WorkObjectHeader) ProtoEncode() (*ProtoWorkObjectHeader, error) {
 	mixHash := common.ProtoHash{Value: wh.MixHash().Bytes()}
 	lock := uint32(wh.Lock())
 	coinbase := common.ProtoAddress{Value: wh.PrimaryCoinbase().Bytes()}
+	data := wh.Data()
 
 	return &ProtoWorkObjectHeader{
 		HeaderHash:          &hash,
@@ -1157,6 +1176,7 @@ func (wh *WorkObjectHeader) ProtoEncode() (*ProtoWorkObjectHeader, error) {
 		MixHash:             &mixHash,
 		Time:                &wh.time,
 		PrimaryCoinbase:     &coinbase,
+		Data:                data,
 	}, nil
 }
 
@@ -1177,6 +1197,7 @@ func (wh *WorkObjectHeader) ProtoDecode(data *ProtoWorkObjectHeader, location co
 	wh.SetMixHash(common.BytesToHash(data.GetMixHash().Value))
 	wh.SetTime(data.GetTime())
 	wh.SetPrimaryCoinbase(common.BytesToAddress(data.GetPrimaryCoinbase().GetValue(), location))
+	wh.SetData(data.GetData())
 
 	return nil
 }
diff --git a/core/types/wo_test.go b/core/types/wo_test.go
index 688481495..6a8eab47f 100644
--- a/core/types/wo_test.go
+++ b/core/types/wo_test.go
@@ -1,6 +1,7 @@
 package types
 
 import (
+	"bytes"
 	"math/big"
 	"testing"
 
@@ -23,6 +24,7 @@ func woTestData() (*WorkObject, common.Hash) {
 			time:                uint64(1),
 			nonce:               EncodeNonce(uint64(1)),
 			lock:                0,
+			data:                []byte{0, 1, 2, 3},
 		},
 	}
 	return wo, wo.Hash()
@@ -30,7 +32,7 @@ func woTestData() (*WorkObject, common.Hash) {
 
 func TestWoHash(t *testing.T) {
 	_, actualHash := woTestData()
-	expectedHash := common.HexToHash("0x572273f26629ca2a02c329cd21dc3def6e1d1934465ea11fca393c7a9ce3c89b")
+	expectedHash := common.HexToHash("0x5ea71d29dbbfbd3d0ca07fa7349f9275ed9f80376e4077a07ef7d78266b4204a")
 	require.Equal(t, expectedHash, actualHash, "Hash not equal to expected hash")
 }
 
@@ -104,6 +106,19 @@ func FuzzNonceHash(f *testing.F) {
 		func(woh *WorkObjectHeader, nonce uint64) { woh.nonce = EncodeNonce(nonce) })
 }
 
+func FuzzDataHash(f *testing.F) {
+	header, _ := woTestData()
+	f.Add(testByte)
+	f.Add(header.Data())
+	f.Fuzz(func(t *testing.T, b []byte) {
+		localHeader, hash := headerTestData()
+		if !bytes.Equal(localHeader.extra, b) {
+			localHeader.extra = b
+			require.NotEqual(t, localHeader.Hash(), hash, "Hash equal for extra \noriginal: %v, modified: %v", header.Data(), b)
+		}
+	})
+}
+
 func fuzzHash(f *testing.F, getField func(*WorkObjectHeader) common.Hash, setField func(*WorkObjectHeader, common.Hash)) {
 	wo, _ := woTestData()
 	f.Add(testByte)
diff --git a/core/worker.go b/core/worker.go
index 1b28b566e..fff3a5aa0 100644
--- a/core/worker.go
+++ b/core/worker.go
@@ -1481,6 +1481,7 @@ func (w *worker) prepareWork(genParams *generateParams, wo *types.WorkObject) (*
 	num := parent.Number(nodeCtx)
 	newWo := types.EmptyWorkObject(nodeCtx)
 	newWo.WorkObjectHeader().SetLock(w.GetLockupByte())
+	newWo.WorkObjectHeader().SetData([]byte{})
 	newWo.SetParentHash(wo.Hash(), nodeCtx)
 	if w.hc.IsGenesisHash(parent.Hash()) {
 		newWo.SetNumber(big.NewInt(1), nodeCtx)
@@ -1656,7 +1657,7 @@ func (w *worker) prepareWork(genParams *generateParams, wo *types.WorkObject) (*
 			w.logger.WithField("err", err).Error("Failed to prepare header for sealing")
 			return nil, err
 		}
-		proposedWoHeader := types.NewWorkObjectHeader(newWo.Hash(), newWo.ParentHash(nodeCtx), newWo.Number(nodeCtx), newWo.Difficulty(), newWo.WorkObjectHeader().PrimeTerminusNumber(), newWo.TxHash(), newWo.Nonce(), newWo.Lock(), newWo.Time(), newWo.Location(), newWo.PrimaryCoinbase())
+		proposedWoHeader := types.NewWorkObjectHeader(newWo.Hash(), newWo.ParentHash(nodeCtx), newWo.Number(nodeCtx), newWo.Difficulty(), newWo.WorkObjectHeader().PrimeTerminusNumber(), newWo.TxHash(), newWo.Nonce(), newWo.Lock(), newWo.Time(), newWo.Location(), newWo.PrimaryCoinbase(), newWo.Data())
 		proposedWoBody := types.NewWoBody(newWo.Header(), nil, nil, nil, nil, nil)
 		proposedWo := types.NewWorkObject(proposedWoHeader, proposedWoBody, nil)
 		env, err := w.makeEnv(parent, proposedWo, w.GetPrimaryCoinbase(), w.GetSecondaryCoinbase())
@@ -1712,7 +1713,7 @@ func (w *worker) prepareWork(genParams *generateParams, wo *types.WorkObject) (*
 		}
 		return env, nil
 	} else {
-		proposedWoHeader := types.NewWorkObjectHeader(newWo.Hash(), newWo.ParentHash(nodeCtx), newWo.Number(nodeCtx), newWo.Difficulty(), newWo.WorkObjectHeader().PrimeTerminusNumber(), types.EmptyRootHash, newWo.Nonce(), newWo.Lock(), newWo.Time(), newWo.Location(), newWo.PrimaryCoinbase())
+		proposedWoHeader := types.NewWorkObjectHeader(newWo.Hash(), newWo.ParentHash(nodeCtx), newWo.Number(nodeCtx), newWo.Difficulty(), newWo.WorkObjectHeader().PrimeTerminusNumber(), types.EmptyRootHash, newWo.Nonce(), newWo.Lock(), newWo.Time(), newWo.Location(), newWo.PrimaryCoinbase(), newWo.Data())
 		proposedWoBody := types.NewWoBody(newWo.Header(), nil, nil, nil, nil, nil)
 		proposedWo := types.NewWorkObject(proposedWoHeader, proposedWoBody, nil)
 		return &environment{wo: proposedWo}, nil