optimize(helper): writer decl.

gold/link/recv.go

@@ -46,7 +46,7 @@ func (m *Me) wait(data []byte) *orbyte.Item[head.Packet] {
 			}
 			return nil
 		}
-		data = w.TransBytes()
+		data = w.TransUnderlyingBytes()
 		if len(data) < bound {
 			bound = len(data)
 			endl = "."

gold/p2p/tcp/pdu.go

@@ -80,7 +80,7 @@ func (p *packet) ReadFrom(r io.Reader) (n int64, err error) {
 	if err != nil {
 		return
 	}
-	p.dat = w.TransBytes()
+	p.dat = w.TransUnderlyingBytes()
 	return
 }