tokenReducer.js

import { createReducer } from 'Reducers/helpers'
import merge from 'lodash-es/merge'

const initState = {
  accessToken: null,
  refreshToken: null
}

// handlers
function set (state, { accessToken, refreshToken }) {
  return merge({}, state, { accessToken, refreshToken })
}

function reset (state) {
  return {
    ...initState
  }
}

const reducer = createReducer({
  'TOKEN:SET': set,
  'TOKEN:RESET': reset
}, initState)

export default reducer