add signers field

api/service/explorer/service.go

@@ -107,8 +107,8 @@ func (s *Service) Run() *http.Server {
 	return server
 }
 
-// GetAccountBlocks returns a list of types.Block to server blocks end-point.
-func (s *Service) GetAccountBlocks(from, to int) []*types.Block {
+// ReadBlocksFromDB returns a list of types.Block to server blocks end-point.
+func (s *Service) ReadBlocksFromDB(from, to int) []*types.Block {
 	blocks := []*types.Block{}
 	for i := from - 1; i <= to+1; i++ {
 		if i < 0 {
@@ -160,19 +160,12 @@ func (s *Service) GetExplorerBlocks(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	accountBlocks := s.GetAccountBlocks(fromInt, toInt)
+	accountBlocks := s.ReadBlocksFromDB(fromInt, toInt)
 	for id, accountBlock := range accountBlocks {
 		if id == 0 || id == len(accountBlocks)-1 || accountBlock == nil {
 			continue
 		}
-		block := &Block{
-			Height:     strconv.Itoa(id + fromInt - 1),
-			ID:         accountBlock.Hash().Hex(),
-			TXCount:    strconv.Itoa(accountBlock.Transactions().Len()),
-			Timestamp:  strconv.Itoa(int(accountBlock.Time().Int64() * 1000)),
-			MerkleRoot: accountBlock.Hash().Hex(),
-			Bytes:      strconv.Itoa(int(accountBlock.Size())),
-		}
+		block := NewBlock(accountBlock, id+fromInt-1)
 		// Populate transactions
 		for _, tx := range accountBlock.Transactions() {
 			transaction := GetTransaction(tx, accountBlock)

api/service/explorer/structs.go

@@ -49,6 +49,7 @@ type Block struct {
 	Bytes      string         `json:"bytes"`
 	NextBlock  RefBlock       `json:"nextBlock"`
 	TXs        []*Transaction `json:"txs"`
+	Signers    []string       `json:"signers"`
 }
 
 // RefBlock ...
@@ -67,6 +68,20 @@ type Shard struct {
 	Nodes []Node `json:"nodes"`
 }
 
+// NewBlock ...
+func NewBlock(block *types.Block, height int) *Block {
+	// TODO(ricl): use block.Header().CommitBitmap and GetPubKeyFromMask
+	return &Block{
+		Height:     strconv.Itoa(height),
+		ID:         block.Hash().Hex(),
+		TXCount:    strconv.Itoa(block.Transactions().Len()),
+		Timestamp:  strconv.Itoa(int(block.Time().Int64() * 1000)),
+		MerkleRoot: block.Hash().Hex(),
+		Bytes:      strconv.Itoa(int(block.Size())),
+		Signers:    []string{},
+	}
+}
+
 // GetTransaction ...
 func GetTransaction(tx *types.Transaction, accountBlock *types.Block) *Transaction {
 	if tx.To() == nil {