Node 16 Async Storage

store.js

const {AsyncLocalStorage} = require('async_hooks')

const localStorage = new AsyncLocalStorage()

const sleep = () => new Promise(r=>setTimeout(r, 10))

const nestedFuncA = async () => {
  await sleep()
  const store = localStorage.getStore()
  if (store) {
    store['nested_a'] = 'nested_a'
  }
  await nestedFuncB()
}
const nestedFuncB = async () => {
  await sleep()
  const store = localStorage.getStore()
  if (store) {
    store['nested_b'] = 'nested_b'
  }
}

const funcA = async () => {
  await sleep()
  const store = localStorage.getStore()
  if (store) {
    store['a'] = 'a'
  }
  await funcB()
}
const funcB = async () => {
  await sleep()
  const store = localStorage.getStore()
  if (store) {
    store['b'] = 'b'
  }
  await funcC()
}
const funcC = async () => {
  await sleep()
  const store = localStorage.getStore()
  if (store) {
    store['c'] = 'c'
  }
  localStorage.run(store, async () => {
    await nestedFuncA()
    const store = localStorage.getStore()
    console.log('access store in nested function',store)
  })
  if (store) {
    store['c_after_nested_call'] = 'c_after_nested_call'
  }
}

localStorage.run({}, async () => {
  await funcA()
  const store = localStorage.getStore()
  console.log('access store in main function', store)
})