fix deltaTimeStamp for unsigned txs execution for specific block

Author: tclemos

state/transaction.go

@@ -372,6 +372,17 @@ func (s *State) internalProcessUnsignedTransactionV1(ctx context.Context, tx *ty
 	}
 	nonce := loadedNonce.Uint64()
 
+	var oldStateRoot common.Hash
+	previousL2BlockNumber := uint64(0)
+	if l2Block.NumberU64() > 0 {
+		previousL2BlockNumber = l2Block.NumberU64() - 1
+	}
+	previousL2Block, err := s.GetL2BlockByNumber(ctx, previousL2BlockNumber, dbTx)
+	if err != nil {
+		return nil, err
+	}
+	oldStateRoot = previousL2Block.Root()
+
 	batchL2Data, err := EncodeUnsignedTransaction(*tx, s.cfg.ChainID, &nonce, forkID)
 	if err != nil {
 		log.Errorf("error encoding unsigned transaction ", err)
@@ -382,7 +393,7 @@ func (s *State) internalProcessUnsignedTransactionV1(ctx context.Context, tx *ty
 	processBatchRequestV1 := &executor.ProcessBatchRequest{
 		From:             senderAddress.String(),
 		OldBatchNum:      batch.BatchNumber,
-		OldStateRoot:     l2Block.Root().Bytes(),
+		OldStateRoot:     oldStateRoot.Bytes(),
 		OldAccInputHash:  batch.AccInputHash.Bytes(),
 		ForkId:           forkID,
 		Coinbase:         l2Block.Coinbase().String(),