chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  switch(message.action) {
  case "/users/get":
    GetUser.apply(sender, [message, sendResponse]);
    break;
  default:
    NotFound.apply(sender, [message, sendResponse]);
  }
  return true;
});

const router = new chomex.Router();
router.on("/users/get", GetUser);
chrome.runtime.onMessage.addListener(router.listener());

chrome.runtime.sendMessage({action:"/users/get",id:123}, (response) => {
  if (response.status == 200) {
    alert("User: " + response.user.name);
  } else {
    console.log("Error:", response);
  }
});

const client = new chomex.Client(chrome.runtime);
const response = await client.message("/users/get", {id:123});
alert("User: " + response.data.user.name);

import {Router, Model, Types} from 'chomex';

// Define your model
class User extends Model {
  static schema = {
    name: Types.string.isRequired,
    age:  Types.number,
  }
}

const router = new Router();

// Define your routes
router.on("/users/create", message => {
  const obj = message.user;
  const user = User.new(obj).save();
  return user;
});

router.on("/users/get", message => {
  const userId = message.id;
  const user = User.find(userId);
  if (!user) {
    return {status:404,error:"not found"};
  }
  // You can also return async Promise
  return Promise.resolve(user);
});

// Of course, you can separate files
// in which controller functions are defined.
import {UserDelete} from "./Controllers/Users";
router.on("/users/delete", UserDelete);

// Don't forget to add listener to chrome modules.
chrome.runtime.onMessage.addListener(router.listener());

import {Client} from 'chomex';

const client = new Client(chrome.runtime);

// it sends message to "/users/get" route.
const user = {name: 'otiai10', age: 30};
const response = await client.message('/users/create', {user});
console.log("Created!", response.data);

const {data: user} = await client.message('/users/get', {id: 12345});
console.log("Found:", res.data);

// Resolver rule, which resolve given "id" to routing name.
const resolve = (id) => {
  const prefix = id.split(".")[0];
  return {name: prefix};
};

const router = new Router(resolve);
// You see, this controller is invoked when
// a notification with ID "quest.xxxx" is clicked.
router.on('quest', NotificaionOnClickController.Quest);

chrome.notifications.onClicked.addListener(router.listener());