add needed files

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

codec.go

@@ -0,0 +1,54 @@
+package drpc
+
+import (
+	"io"
+
+	"github.com/unistack-org/micro/v3/codec"
+	"storj.io/drpc"
+)
+
+type wrapMicroCodec struct{ codec.Codec }
+
+func (w *wrapMicroCodec) Marshal(v drpc.Message) ([]byte, error) {
+	if m, ok := v.(*codec.Frame); ok {
+		return m.Data, nil
+	}
+	return w.Codec.Marshal(v.(interface{}))
+}
+
+func (w *wrapMicroCodec) Unmarshal(d []byte, v drpc.Message) error {
+	if d == nil || v == nil {
+		return nil
+	}
+	if m, ok := v.(*codec.Frame); ok {
+		m.Data = d
+		return nil
+	}
+	return w.Codec.Unmarshal(d, v.(interface{}))
+}
+
+func (w *wrapMicroCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
+	return nil
+}
+
+func (w *wrapMicroCodec) ReadBody(conn io.Reader, v interface{}) error {
+	if m, ok := v.(*codec.Frame); ok {
+		_, err := conn.Read(m.Data)
+		return err
+	}
+	return codec.ErrInvalidMessage
+}
+
+func (w *wrapMicroCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
+	// if we don't have a body
+	if v != nil {
+		b, err := w.Marshal(v)
+		if err != nil {
+			return err
+		}
+		m.Body = b
+	}
+	// write the body using the framing codec
+	_, err := conn.Write(m.Body)
+	return err
+}