initial implementation

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

message.go

@@ -0,0 +1,36 @@
+package tcp
+
+import "github.com/unistack-org/micro/v3/codec"
+
+type tcpMessage struct {
+	topic       string
+	payload     interface{}
+	contentType string
+	header      map[string]string
+	body        []byte
+	codec       codec.Reader
+}
+
+func (r *tcpMessage) Topic() string {
+	return r.topic
+}
+
+func (r *tcpMessage) Payload() interface{} {
+	return r.payload
+}
+
+func (r *tcpMessage) ContentType() string {
+	return r.contentType
+}
+
+func (r *tcpMessage) Header() map[string]string {
+	return r.header
+}
+
+func (r *tcpMessage) Body() []byte {
+	return r.body
+}
+
+func (r *tcpMessage) Codec() codec.Reader {
+	return r.codec
+}