Used in the nestjs (typescript) framework, the ts compiler tells you that the types do not match

[ufec]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

Used in the nestjs (typescript) framework, the ts compiler tells you that the types do not match

as shown in the picture
I have to use type assertion like this

type FastifyAdapterParameters = Parameters<typeof adapter.register>;
type FastifyAdapterRegister = FastifyAdapterParameters[0];
const Helmet = fastifyHelmet as unknown as FastifyAdapterRegister;
await app.register(Helmet); // or await adapter.register(Helmet);

If I don't do this, I will get a type validation error

Argument of type 'FastifyHelmet' is not assignable to parameter of type 'FastifyPluginCallback<FastifyHelmetOptions, RawServerDefault, FastifyTypeProviderDefault> | FastifyPluginAsync<...> | Promise<...> | Promise<...>'.
Type 'FastifyHelmet' is not assignable to type 'FastifyPluginCallback<FastifyHelmetOptions, RawServerDefault, FastifyTypeProviderDefault>'.

Minimum reproduction code

https://stackblitz.com/edit/nestjs-typescript-starter-yffp2u?file=src/main.ts

Steps to reproduce

npm i -g @nestjs/cli
nest new test_helmet
cd test_helmet
npm uninstall @nestjs/platform-express && npm install --save @nestjs/platform-fastify fastify @fastify/helmet

modify src/main.ts to

import { NestFactory } from '@nestjs/core';
import {
  FastifyAdapter,
  NestFastifyApplication,
} from '@nestjs/platform-fastify';
import fastifyHelmet from '@fastify/helmet';
import { AppModule } from './app.module';

async function bootstrap() {
  const adapter = new FastifyAdapter();
  const app = await NestFactory.create<NestFastifyApplication>(
    AppModule,
    adapter,
  );
  app.register(fastifyHelmet);
  await app.listen(3000);
}
bootstrap();

you will get a type error

Expected behavior

like this app.register(fastifyHelmet); and no type error

Package

• I don't know. Or some 3rd-party package
• @nestjs/common
• @nestjs/core
• @nestjs/microservices
• @nestjs/platform-express
• @nestjs/platform-fastify
• @nestjs/platform-socket.io
• @nestjs/platform-ws
• @nestjs/testing
• @nestjs/websockets
• Other (see below)

Other package

fastify

NestJS version

No response

Packages versions

{
  "name": "nest-typescript-starter",
  "private": true,
  "version": "1.0.0",
  "description": "Nest TypeScript starter repository",
  "license": "MIT",
  "scripts": {
    "build": "nest build",
    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
    "start": "nest start",
    "start:dev": "nest start --watch",
    "start:debug": "nest start --debug --watch",
    "start:prod": "node dist/main",
    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
    "test": "jest",
    "test:watch": "jest --watch",
    "test:cov": "jest --coverage",
    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
    "test:e2e": "jest --config ./test/jest-e2e.json"
  },
  "dependencies": {
    "@fastify/helmet": "^10.1.0",
    "@nestjs/common": "^9.0.0",
    "@nestjs/core": "^9.0.0",
    "@nestjs/platform-fastify": "^9.2.0",
    "fastify": "^4.10.2",
    "reflect-metadata": "^0.1.13",
    "rxjs": "^7.5.5"
  },
  "devDependencies": {
    "@nestjs/cli": "^9.0.0",
    "@nestjs/schematics": "^9.0.0",
    "@nestjs/testing": "^9.0.0",
    "@types/express": "^4.17.13",
    "@types/jest": "^28.1.4",
    "@types/node": "^18.0.3",
    "@types/supertest": "^2.0.12",
    "@typescript-eslint/eslint-plugin": "^5.30.5",
    "@typescript-eslint/parser": "^5.30.5",
    "eslint": "^8.19.0",
    "eslint-config-prettier": "^8.5.0",
    "eslint-plugin-prettier": "^4.2.1",
    "jest": "^28.1.2",
    "prettier": "^2.7.1",
    "source-map-support": "^0.5.21",
    "supertest": "^6.2.4",
    "ts-jest": "^28.0.5",
    "ts-loader": "^9.3.1",
    "ts-node": "^10.8.2",
    "tsconfig-paths": "^4.0.0",
    "typescript": "^4.7.4"
  },
  "jest": {
    "moduleFileExtensions": [
      "js",
      "json",
      "ts"
    ],
    "rootDir": "src",
    "testRegex": ".*\\.spec\\.ts$",
    "transform": {
      "^.+\\.(t|j)s$": "ts-jest"
    },
    "collectCoverageFrom": [
      "**/*.(t|j)s"
    ],
    "coverageDirectory": "../coverage",
    "testEnvironment": "node"
  }
}

Node.js version

16.17.0

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

I tried looking for a solution in the fastify-helmet repository, but I realized that I seemed to be looking in the wrong place, because the default fastify works fine
Later I forked the nestjs project and manually changed the fastify version locally. After building, I got the expected results in 10-fastify. Should I submit a PR?

[ufec]

I also had the same problem with @fastify/compress

[micalevisk]

I guess upgrading fastify would fix that. #10583

[ufec]

I guess upgrading fastify would fix that. #10583

in my given minimum reproduction code

I use latest fastify, but this is due to
packages/platform-fastify/package.json The version of fastify that this file depends on is too low. I tried to submit a PR #10601 but it was closed

[micalevisk]

but it was closed

#10601 (comment)

[ufec]

but it was closed

#10601 (comment)

When can it be applied

[micalevisk]

when Kamil is available to review and approve it.

[ufec]

when Kamil is available to review and approve it.

OK