[#229] v2/object: Add hash fields to ShortHeader message

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

v2/object/types.go

@@ -19,6 +19,8 @@ type ShortHeader struct {
 	typ Type
 
 	payloadLen uint64
+
+	payloadHash, homoHash *refs.Checksum
 }
 
 type Attribute struct {
@@ -296,6 +298,34 @@ func (h *ShortHeader) SetPayloadLength(v uint64) {
 	}
 }
 
+func (h *ShortHeader) GetPayloadHash() *refs.Checksum {
+	if h != nil {
+		return h.payloadHash
+	}
+
+	return nil
+}
+
+func (h *ShortHeader) SetPayloadHash(v *refs.Checksum) {
+	if h != nil {
+		h.payloadHash = v
+	}
+}
+
+func (h *ShortHeader) GetHomomorphicHash() *refs.Checksum {
+	if h != nil {
+		return h.homoHash
+	}
+
+	return nil
+}
+
+func (h *ShortHeader) SetHomomorphicHash(v *refs.Checksum) {
+	if h != nil {
+		h.homoHash = v
+	}
+}
+
 func (h *ShortHeader) getHeaderPart() {}
 
 func (a *Attribute) GetKey() string {