actions.ts

import { Action } from "easy-peasy";

type TodosModel = {
  items: string[];
  add: Action<TodosModel, string>; // 👈
}
    
type NotificationModel = {
  msg: string;
  set: Action<NotificationModel, string>; // 👈
}

export type StoreModel = {
  todos: TodosModel;
  notification: NotificationModel;
}