Along with the options for the CreateJwt() function (see docs for jwt package), the following options can be passed in when registering the plugin with fastify.

Option	Type	Default	Description
prefix	string	-	Used to specify what route the middleware is registered with.
transformer	JwtPayloadTransformer<Payload, Transformer>	-	The function that you will use for manipulating the JWT you are authenticating.
getJwt	function	-	A function for getting the JWT from the request. By default, the JWT is pulled from the auth header.
validate	boolean	-	Boolean used to signify if we want to validate the jwt if true, or just decode it if false.

Usage

TypeScript Coding Example

import express from 'express'
import request from 'supertest'
import { verifyJwtPlugin } from '../src/express.js'
import { Type } from '@sinclair/typebox'

// set up express server
const app = express()

// use the transformer
const transformer = (payload: { 'http://byu.edu/claims/client_preferred_first_name': string }): { preferred_first_name: string } => ({ preferred_first_name: payload['http://byu.edu/claims/client_preferred_first_name'] })
try {
  app.use(verifyJwtPlugin({ schema: Type.Object({ }, { additionalProperties: true }), key: '', validate: false, transformer }))
} catch (e) {
  console.log(e)
}

// define an endpoint
app.get('/', (req, res) => {
  res.send(req.caller)
})
const server = app.listen(3000)

const response = await request(server).get('/').set('Authorization', /* A valid token */).send({ })
console.log(response)

server.close()