diff --git a/api/coreservice.go b/api/coreservice.go
index 783d8a27c1..815ec411d4 100644
--- a/api/coreservice.go
+++ b/api/coreservice.go
@@ -1039,7 +1039,10 @@ func (core *coreService) BlockByHash(blkHash string) (*block.Store, error) {
 	if err != nil {
 		return nil, errors.Wrap(ErrNotFound, err.Error())
 	}
-	return &block.Store{blk, receipts}, nil
+	return &block.Store{
+		Block:    blk,
+		Receipts: receipts,
+	}, nil
 }
 
 // BlockMetas returns blockmetas response within the height range
@@ -1101,45 +1104,6 @@ func (core *coreService) getBlockMetaByHeight(height uint64) (*iotextypes.BlockM
 	return generateBlockMeta(blk), nil
 }
 
-// generateBlockMeta generates BlockMeta from block
-func generateBlockMeta(blk *block.Block) *iotextypes.BlockMeta {
-	header := blk.Header
-	height := header.Height()
-	ts := timestamppb.New(header.Timestamp())
-	var (
-		producerAddress string
-		h               hash.Hash256
-	)
-	if blk.Height() > 0 {
-		producerAddress = header.ProducerAddress()
-		h = header.HashBlock()
-	} else {
-		h = block.GenesisHash()
-	}
-	txRoot := header.TxRoot()
-	receiptRoot := header.ReceiptRoot()
-	deltaStateDigest := header.DeltaStateDigest()
-	prevHash := header.PrevHash()
-
-	blockMeta := iotextypes.BlockMeta{
-		Hash:              hex.EncodeToString(h[:]),
-		Height:            height,
-		Timestamp:         ts,
-		ProducerAddress:   producerAddress,
-		TxRoot:            hex.EncodeToString(txRoot[:]),
-		ReceiptRoot:       hex.EncodeToString(receiptRoot[:]),
-		DeltaStateDigest:  hex.EncodeToString(deltaStateDigest[:]),
-		PreviousBlockHash: hex.EncodeToString(prevHash[:]),
-	}
-	if logsBloom := header.LogsBloomfilter(); logsBloom != nil {
-		blockMeta.LogsBloom = hex.EncodeToString(logsBloom.Bytes())
-	}
-	blockMeta.NumActions = int64(len(blk.Actions))
-	blockMeta.TransferAmount = blk.CalculateTransferAmount().String()
-	blockMeta.GasLimit, blockMeta.GasUsed = gasLimitAndUsed(blk)
-	return &blockMeta
-}
-
 // GasLimitAndUsed returns the gas limit and used in a block
 func gasLimitAndUsed(b *block.Block) (uint64, uint64) {
 	var gasLimit, gasUsed uint64
diff --git a/api/grpcserver.go b/api/grpcserver.go
index 2c30ead8e0..d289692a89 100644
--- a/api/grpcserver.go
+++ b/api/grpcserver.go
@@ -37,6 +37,7 @@ import (
 	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/reflection"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/timestamppb"
 
 	"github.com/iotexproject/iotex-core/action"
 	"github.com/iotexproject/iotex-core/action/protocol"
@@ -721,3 +722,42 @@ func (svr *GRPCServer) TraceTransactionStructLogs(ctx context.Context, in *iotex
 		StructLogs: structLogs,
 	}, nil
 }
+
+// generateBlockMeta generates BlockMeta from block
+func generateBlockMeta(blk *block.Block) *iotextypes.BlockMeta {
+	header := blk.Header
+	height := header.Height()
+	ts := timestamppb.New(header.Timestamp())
+	var (
+		producerAddress string
+		h               hash.Hash256
+	)
+	if blk.Height() > 0 {
+		producerAddress = header.ProducerAddress()
+		h = header.HashBlock()
+	} else {
+		h = block.GenesisHash()
+	}
+	txRoot := header.TxRoot()
+	receiptRoot := header.ReceiptRoot()
+	deltaStateDigest := header.DeltaStateDigest()
+	prevHash := header.PrevHash()
+
+	blockMeta := iotextypes.BlockMeta{
+		Hash:              hex.EncodeToString(h[:]),
+		Height:            height,
+		Timestamp:         ts,
+		ProducerAddress:   producerAddress,
+		TxRoot:            hex.EncodeToString(txRoot[:]),
+		ReceiptRoot:       hex.EncodeToString(receiptRoot[:]),
+		DeltaStateDigest:  hex.EncodeToString(deltaStateDigest[:]),
+		PreviousBlockHash: hex.EncodeToString(prevHash[:]),
+	}
+	if logsBloom := header.LogsBloomfilter(); logsBloom != nil {
+		blockMeta.LogsBloom = hex.EncodeToString(logsBloom.Bytes())
+	}
+	blockMeta.NumActions = int64(len(blk.Actions))
+	blockMeta.TransferAmount = blk.CalculateTransferAmount().String()
+	blockMeta.GasLimit, blockMeta.GasUsed = gasLimitAndUsed(blk)
+	return &blockMeta
+}