wip crack handler

src/idz/handler/saveTopic.ts

@@ -0,0 +1,9 @@
+import { SaveTopicRequest } from "../request/saveTopic";
+import { SaveTopicResponse } from "../response/saveTopic";
+import { World } from "../world";
+
+export function saveTopic(w: World, req: SaveTopicRequest): SaveTopicResponse {
+  return {
+    type: "save_topic_res",
+  };
+}