store.ts

const todoApp = combineReducers(reducers)
const store = createStore(
  todoApp,
  applyMiddleware(
   UserPropsInjectorMiddleware,
    // add all middlewares comma separated
    // middleware1,
    // middleware2 ...
  )
)

UserPropsInjectorMiddleware.ts

const UserPropsInjectorMiddleware = (store: any) => (next: any) => (action: any) => {
   // This will append userProps to all the actions called
   // Store used here is an immutable state object, so store.getState()
   // is an immutable object and need to use 'get' method to get attributes
   // use store.getState().userData if it is a plain object
   action.userProps = store.getState().get('userData')
    const result = next(action)
    return result
}
export default UserPropsInjectorMiddleware;