рабочий вариант, но скороть 10 МБит

agents/rap-node-agent/internal/fabricproto/frame_test.go

@@ -102,6 +102,26 @@ func TestRejectsOversizedPayload(t *testing.T) {
 	}
 }
 
+func TestDefaultPayloadAllowsMultiMegabyteServiceBatches(t *testing.T) {
+	payload := bytes.Repeat([]byte("x"), 2*1024*1024)
+	frame := Frame{
+		Type:     FrameData,
+		StreamID: 1,
+		Payload:  payload,
+	}
+	encoded, err := MarshalFrame(frame)
+	if err != nil {
+		t.Fatalf("marshal multi-megabyte frame: %v", err)
+	}
+	decoded, err := UnmarshalFrame(encoded, DefaultMaxPayload)
+	if err != nil {
+		t.Fatalf("unmarshal multi-megabyte frame: %v", err)
+	}
+	if len(decoded.Payload) != len(payload) {
+		t.Fatalf("payload length = %d, want %d", len(decoded.Payload), len(payload))
+	}
+}
+
 func TestRejectsUnknownTrafficClass(t *testing.T) {
 	frame := Frame{
 		Type:         FrameOpenStream,