added filter payloads for spv client compliance (#90)

* added filter payloads for spv client compliance

* bumped version

pkg/network/message.go

@@ -62,6 +62,10 @@ const (
 	CMDTX          CommandType = "tx"
 	CMDConsensus   CommandType = "consensus"
 	CMDUnknown     CommandType = "unknown"
+	CMDFilterAdd   CommandType = "filteradd"
+	CMDFilterClear CommandType = "filterclear"
+	CMDFilterLoad  CommandType = "filterload"
+	CMDMerkleBlock CommandType = "merkleblock"
 )
 
 // NewMessage returns a new message with the given payload.
@@ -119,6 +123,14 @@ func (m *Message) CommandType() CommandType {
 		return CMDTX
 	case "consensus":
 		return CMDConsensus
+	case "merkleblock":
+		return CMDMerkleBlock
+	case "filterload":
+		return CMDFilterLoad
+	case "filteradd":
+		return CMDFilterAdd
+	case "filterclear":
+		return CMDFilterClear
 	default:
 		return CMDUnknown
 	}
@@ -198,6 +210,11 @@ func (m *Message) decodePayload(r io.Reader) error {
 		if err := p.DecodeBinary(buf); err != nil {
 			return err
 		}
+	case CMDMerkleBlock:
+		p = &payload.MerkleBlock{}
+		if err := p.DecodeBinary(buf); err != nil {
+			return err
+		}
 	}
 
 	m.Payload = p

pkg/network/payload/merkleblock.go

@@ -0,0 +1,39 @@
+package payload
+
+import (
+	"encoding/binary"
+	"io"
+
+	"github.com/CityOfZion/neo-go/pkg/core"
+	"github.com/CityOfZion/neo-go/pkg/util"
+)
+
+type MerkleBlock struct {
+	*core.BlockBase
+	TxCount int
+	Hashes  []util.Uint256
+	Flags   []byte
+}
+
+func (m *MerkleBlock) DecodeBinary(r io.Reader) error {
+	m.BlockBase = &core.BlockBase{}
+	if err := m.BlockBase.DecodeBinary(r); err != nil {
+		return err
+	}
+
+	m.TxCount = int(util.ReadVarUint(r))
+	n := util.ReadVarUint(r)
+	m.Hashes = make([]util.Uint256, n)
+	for i := 0; i < len(m.Hashes); i++ {
+		if err := binary.Read(r, binary.LittleEndian, &m.Hashes[i]); err != nil {
+			return err
+		}
+	}
+	var err error
+	m.Flags, err = util.ReadVarBytes(r)
+	return err
+}
+
+func (m *MerkleBlock) EncodeBinary(w io.Writer) error {
+	return nil
+}