custom-errors.js

'use strict'

const Hemera = require('./../../packages/hemera')
const nats = require('nats').connect()

const hemera = new Hemera(nats)

hemera.ready(() => {
  const UnauthorizedError = Hemera.createError('Unauthorized')

  hemera.add(
    {
      topic: 'math',
      cmd: 'add'
    },
    function(req, cb) {
      const err = new UnauthorizedError('Unauthorized action')
      cb(err)
    }
  )

  hemera.act(
    {
      topic: 'math',
      cmd: 'add',
      a: 1,
      b: 2
    },
    function(err, resp) {
      console.log(err instanceof UnauthorizedError)
    }
  )
})