Working version(some)

src/main/preload.ts

@@ -1,8 +1,10 @@
-// Disable no-unused-vars, broken for spread args
-/* eslint no-unused-vars: off */
 import { contextBridge, ipcRenderer, IpcRendererEvent } from 'electron';
 
-export type Channels = 'ipc-example';
+export type Channels =
+  | 'ipc-example'
+  | 'download-progress'
+  | 'launch-minecraft'
+  | 'installation-status';
 
 const electronHandler = {
   ipcRenderer: {
@@ -21,6 +23,9 @@ const electronHandler = {
     once(channel: Channels, func: (...args: unknown[]) => void) {
       ipcRenderer.once(channel, (_event, ...args) => func(...args));
     },
+    invoke(channel: string, ...args: unknown[]) {
+      return ipcRenderer.invoke(channel, ...args);
+    },
   },
 };