Many properties do not exist on 'fastifyPassport' imported from '@fastify/passport'

[schmidtvl]

Prerequisites

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Issue

Node version: v23.11.0
Typescript version: v5.7.3
Fastify version: v5.2.1
Fastify/passport version: v3.0.2
Module type: ESM

I was following the example documentation to get my application set up but I'm running into Typescript errors. It's failing to find basically any property that is supposed to be available on the fastifyPassport module imported from @fastify/passport.

If I compare what is being imported from @fastify/passport to what is being imported from @fastify/secure-session, it seems like the passport module might be missing defining a namespace for fastifyPassport?

fastifySecureSession:

fastifyPassport:

Am I missing something in my setup or is there further work required on the module to export the properties?

This is my tsconfig.json:

{
  "compilerOptions": {
    "baseUrl": "./src",
    "module": "NodeNext",
    "target": "ES2022",
    "moduleResolution": "NodeNext",
    "strict": true,
    "declaration": true,
    "outDir": "./dist",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
  },
  "include": ["./src/**/*.ts"],
  "ts-node": {
    "esm": true,
    "transpileOnly": true,
    "logError": true,
  }
}

Note: I tried the solution from this issue but it did not resolve my problem.

[schmidtvl]

I can get around this by simply instantiating fastifyPassport as an Authenticator, but it would be good to know if I've done something wrong in my setup, or if there's something missing from the package, or if the documentation needs to be changed.

E.g., this solves my issue as far as I can:

import { Authenticator } from '@fastify/passport';
import Fastify from 'fastify';
import fastifySecureSession from '@fastify/secure-session';

const app = Fastify();
const fastifyPassport = new Authenticator();

app.register(fastifySecureSession, { ... })
app.register(fastifyPassport.initialize());
app.register(fastifyPassport.secureSession());

[jadejr]

@schmidtvl : Trying that broke authentication for me. However, this does work:
import { default as passport } from '@fastify/passport';

Which probably means the real problem is with module resolution when using es modules.

My codebase had been working with the import passport from '@fastify/passport'. It only broke when switching to esm.