chore: add comments

src/controllers/NostrController.ts

@@ -378,6 +378,13 @@ export class NostrController extends EventEmitter {
     throw new Error('Login method is undefined')
   }
 
+  /**
+   * Decrypts a given content based on the current login method.
+   *
+   * @param sender - The sender's public key.
+   * @param content - The encrypted content to decrypt.
+   * @returns A promise that resolves to the decrypted content.
+   */
   nip04Decrypt = async (sender: string, content: string) => {
     const loginMethod = (store.getState().auth as AuthState).loginMethod