Arg I have been working on workers all

import {
    error,      // creates error responses
    json,       // creates JSON responses
    Router,     // the ~440 byte router itself
    withParams, // middleware: puts params directly on the Request
  } from 'itty-router'

import { withDurables } from 'itty-durable'

// export the durable class, per spec
export { Posts } from './Posts'

const router = Router({ base: '' })

router
  // add upstream middleware, allowing Durable access off the request
  .all('*', withDurables())

  // get the durable itself... returns json response, so no need to wrap
  .get('/', ({ Posts }) => Posts.get('test').toJSON())

  // By using { autoReturn: true } in createDurable(), this method returns the contents
  .get('/increment', ({ Posts }) => Posts.get('test').increment())

  // you can pass any serializable params to a method... (e.g. /counter/add/3/4 => 7)
  .get('/add/:a?/:b?', withParams,
    ({ Posts, a, b }) => Posts.get('test').add(Number(a), Number(b))
  )

  // reset the durable
  .get('/reset', ({ Posts }) => Posts.get('test').reset())

  // 404 for everything else
  .all('*', () => missing('Are you sure about that?'))

// with itty, and using ES6 module syntax (required for DO), this is all you need
// Example: Cloudflare Worker module syntax
export default {
    fetch: (request, ...args) =>
      router
        .handle(request, ...args)
        .then(json)     // send as JSON
        .catch(error),  // catch errors
  }

import {
    error,      // creates error responses
    json,       // creates JSON responses
    Router,     // the ~440 byte router itself
    withParams, // middleware: puts params directly on the Request
  } from 'itty-router'

import { withDurables } from 'itty-durable'

// export the durable class, per spec
export { Posts } from './Posts'

const router = Router({ base: '' })

router
  // add upstream middleware, allowing Durable access off the request
  .all('*', withDurables())

  // get the durable itself... returns json response, so no need to wrap
  .get('/', ({ Posts }) => Posts.get('test').toJSON())

  // By using { autoReturn: true } in createDurable(), this method returns the contents
  .get('/increment', ({ Posts }) => Posts.get('test').increment())

  // you can pass any serializable params to a method... (e.g. /counter/add/3/4 => 7)
  .get('/add/:a?/:b?', withParams,
    ({ Posts, a, b }) => Posts.get('test').add(Number(a), Number(b))
  )

  // reset the durable
  .get('/reset', ({ Posts }) => Posts.get('test').reset())

  // 404 for everything else
  .all('*', () => missing('Are you sure about that?'))

// with itty, and using ES6 module syntax (required for DO), this is all you need
// Example: Cloudflare Worker module syntax
export default {
    fetch: (request, ...args) =>
      router
        .handle(request, ...args)
        .then(json)     // send as JSON
        .catch(error),  // catch errors
  }

import { createDurable } from 'itty-durable'

export class Posts extends createDurable({ autoReturn: true }) {
  constructor(state, env) {
    super(state, env)

    // anything defined here is only used for initialization (if not loaded from storage)
    this.counter = 0
  }

  // Because this function does not return anything, it will return the entire contents
  // Example: { counter: 1 }
  increment() {
    this.counter++
  }

  // Any explicit return will honored, despite the autoReturn flag.
  // Note that any serializable params can passed through from the Worker without issue.
  add(a, b) {
    return a + b
  }
}

import { createDurable } from 'itty-durable'

export class Posts extends createDurable({ autoReturn: true }) {
  constructor(state, env) {
    super(state, env)

    // anything defined here is only used for initialization (if not loaded from storage)
    this.counter = 0
  }

  // Because this function does not return anything, it will return the entire contents
  // Example: { counter: 1 }
  increment() {
    this.counter++
  }

  // Any explicit return will honored, despite the autoReturn flag.
  // Note that any serializable params can passed through from the Worker without issue.
  add(a, b) {
    return a + b
  }
}