package rpc import ( "bytes" "encoding/hex" "github.com/kaspanet/kaspad/rpcmodel" "github.com/kaspanet/kaspad/util/daghash" ) // handleGetHeaders implements the getHeaders command. func handleGetHeaders(s *Server, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) { c := cmd.(*rpcmodel.GetHeadersCmd) lowHash := &daghash.ZeroHash if c.LowHash != "" { err := daghash.Decode(lowHash, c.LowHash) if err != nil { return nil, rpcDecodeHexError(c.HighHash) } } highHash := &daghash.ZeroHash if c.HighHash != "" { err := daghash.Decode(highHash, c.HighHash) if err != nil { return nil, rpcDecodeHexError(c.HighHash) } } headers, err := s.cfg.SyncMgr.BlueBlockHeadersBetween(lowHash, highHash) if err != nil { return nil, &rpcmodel.RPCError{ Code: rpcmodel.ErrRPCMisc, Message: err.Error(), } } // Return the serialized block headers as hex-encoded strings. hexBlockHeaders := make([]string, len(headers)) var buf bytes.Buffer for i, h := range headers { err := h.Serialize(&buf) if err != nil { return nil, internalRPCError(err.Error(), "Failed to serialize block header") } hexBlockHeaders[i] = hex.EncodeToString(buf.Bytes()) buf.Reset() } return hexBlockHeaders, nil }