Fighting the demons of my past

TECHNICALLY, I was asked to remove it. But now that I know that @template is a thing that exists in JSDoc (which was the one missing ingredient the last time), I think I can get this to be good enough that removal won't even be necessary, and now it just looks like regular, sane documentation (not the any-schizopost like last time).

src/m2d/event-dispatcher.js

@@ -158,13 +158,17 @@ async function sendError(roomID, source, type, e, payload) {
 }
 
 /**
- * @param {string} type
- * @param {(event: Ty.Event.Outer<any> & {type: any, redacts:any, state_key:any}, ...args: any)=>any} fn
+ * Wraps the function with an automated error catching and reporting mechanism
+ * @template {Ty.Event.Outer<any>} EVENT The event that the wrapped function processes, its first argument.
+ * @template {[]} ARGS Other arguments of the wrapped function
+ * @template RETURNS The output of the wrapped function
+ * @param {string} type Type of the event, during the processing of which the error may occur.
+ * @param {(event: EVENT, ...args: ARGS)=>RETURNS|Promise<RETURNS>} fn Function to wrap
+ * @returns {(event: EVENT, ...args: ARGS)=>Promise<RETURNS|undefined>} Wrapped function
  */
 function guard(type, fn) {
-	return async function(/** @type {Ty.Event.Outer<any>} */ event, /** @type {any} */ ...args) {
+	return async function(event, ...args) {
 		try {
-			// @ts-ignore
 			return await fn(event, ...args)
 		} catch (e) {
 			await sendError(event.room_id, "Matrix", type, e, event)