An helper function for easy token manipulation based on the package jsonwebtoken.

tokenHelper.ts

import jsonwebtoken from "jsonwebtoken"
import type { JwtPayload } from "jsonwebtoken"

export type JwtAppPayload = {
  username: string
  // more properties to store in the token
}

// augmented type containing the custom informations that
export type JwtApp = JwtPayload & JwtAppPayload

const TOKEN_KEY = 'MY_SECRET_TOKEN_HERE'
const TOKEN_EXPIRATION = '16h'

export const tokenHelper = {
  create: (data: JwtPWContent): string => {
    return jsonwebtoken.sign({ ...data }, TOKEN_KEY, {
      expiresIn: TOKEN_EXPIRATION,
    })
  },

  verify: (token: string): JwtPWPayload | undefined => {
    try {
      // verify can not return a string (https://github.com/DefinitelyTyped/DefinitelyTyped/discussions/56954)
      return jsonwebtoken.verify(token, TOKEN_KEY) as JwtPWPayload | undefined
    } catch (error) {
    }
  },
}