diff --git a/beacon/engine/types.go b/beacon/engine/types.go
index 487693ea18..55fb0366f5 100644
--- a/beacon/engine/types.go
+++ b/beacon/engine/types.go
@@ -192,9 +192,11 @@ func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash,
 	if err != nil {
 		return nil, err
 	}
-	if len(params.ExtraData) > 32 {
-		return nil, fmt.Errorf("invalid extradata length: %v", len(params.ExtraData))
-	}
+
+	// TODO(galaio): need hardfork, skip check
+	//if len(params.ExtraData) > 32 {
+	//	return nil, fmt.Errorf("invalid extradata length: %v", len(params.ExtraData))
+	//}
 	if len(params.LogsBloom) != 256 {
 		return nil, fmt.Errorf("invalid logsBloom length: %v", len(params.LogsBloom))
 	}
diff --git a/core/blockchain.go b/core/blockchain.go
index cf7f06602d..d645126a98 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -1930,7 +1930,15 @@ func (bc *BlockChain) insertChain(chain types.Blocks, setHead bool) (int, error)
 				if err != nil {
 					return it.index, err
 				}
-				log.Info("Insert chain", "block", block.NumberU64(), "txDAG", txDAG)
+				log.Info("Insert chain", "block", block.NumberU64(), "txDAG", txDAG.Type())
+			}
+			// TODO(galaio): need hardfork
+			if bc.chainConfig.Optimism != nil && len(block.Header().Extra) > 0 {
+				txDAG, err := types.DecodeTxDAG(block.Header().Extra)
+				if err != nil {
+					return it.index, err
+				}
+				log.Info("Insert chain", "block", block.NumberU64(), "txDAG", txDAG.Type())
 			}
 
 			// Enable prefetching to pull in trie node paths while processing transactions
diff --git a/core/parallel_state_processor.go b/core/parallel_state_processor.go
index e0338f28c9..9fe363f151 100644
--- a/core/parallel_state_processor.go
+++ b/core/parallel_state_processor.go
@@ -741,6 +741,14 @@ func (p *ParallelStateProcessor) Process(block *types.Block, statedb *state.Stat
 			return nil, nil, 0, err
 		}
 	}
+	// TODO(galaio): need hardfork
+	if p.bc.chainConfig.Optimism != nil && len(block.Header().Extra) > 0 {
+		txDAG, err = types.DecodeTxDAG(block.Header().Extra)
+		if err != nil {
+			return nil, nil, 0, err
+		}
+		log.Info("dispatch chain with", "block", block.NumberU64(), "txDAG", txDAG.Type())
+	}
 	// From now on, entering parallel execution.
 	p.doStaticDispatchV2(p.allTxReqs, txDAG) // todo: put txReqs in unit?
 
diff --git a/miner/worker.go b/miner/worker.go
index b4b591aa6d..b0276b88bb 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -1217,6 +1217,25 @@ func (w *worker) generateWork(genParams *generateParams) *newPayloadResult {
 		return &newPayloadResult{err: fmt.Errorf("empty block root")}
 	}
 
+	// Because the TxDAG appends after sidecar, so we only enable after cancun
+	if w.chainConfig.IsCancun(block.Number(), block.Time()) && w.chainConfig.Optimism == nil {
+		txDAG, _ := work.state.MVStates2TxDAG()
+		rawTxDAG, err := types.EncodeTxDAG(txDAG)
+		if err != nil {
+			return &newPayloadResult{err: err}
+		}
+		block = block.WithTxDAG(rawTxDAG)
+	}
+
+	// TODO(galaio): need hardfork
+	if w.chainConfig.Optimism != nil {
+		txDAG, _ := work.state.MVStates2TxDAG()
+		rawTxDAG, err := types.EncodeTxDAG(txDAG)
+		if err != nil {
+			return &newPayloadResult{err: err}
+		}
+		block.Header().Extra = rawTxDAG
+	}
 	assembleBlockTimer.UpdateSince(start)
 	log.Debug("assembleBlockTimer", "duration", common.PrettyDuration(time.Since(start)), "parentHash", genParams.parentHash)
 
@@ -1325,7 +1344,7 @@ func (w *worker) commit(env *environment, interval func(), update bool, start ti
 		}
 
 		// Because the TxDAG appends after sidecar, so we only enable after cancun
-		if w.chainConfig.IsCancun(env.header.Number, env.header.Time) {
+		if w.chainConfig.IsCancun(env.header.Number, env.header.Time) && w.chainConfig.Optimism == nil {
 			for i := len(env.txs); i < len(block.Transactions()); i++ {
 				env.state.RecordSystemTxRWSet(i)
 			}
@@ -1337,6 +1356,16 @@ func (w *worker) commit(env *environment, interval func(), update bool, start ti
 			block = block.WithTxDAG(rawTxDAG)
 		}
 
+		// TODO(galaio): need hardfork
+		if w.chainConfig.Optimism != nil {
+			txDAG, _ := env.state.MVStates2TxDAG()
+			rawTxDAG, err := types.EncodeTxDAG(txDAG)
+			if err != nil {
+				return err
+			}
+			block.Header().Extra = rawTxDAG
+		}
+
 		// If we're post merge, just ignore
 		if !w.isTTDReached(block.Header()) {
 			select {