passport.js - How to implement multiple JWT strategies using multiple secrets in Nest.JS

Question

I like to implement more than one named passport-JWT strategy, each with its own secret. Is there any way it can be implemented? From what I can understand from the documentation, only one secret can be registered during module initialization:

@Module({
  imports: [
    UsersModule,
    PassportModule,
    JwtModule.register({
      secret: jwtConstants.secret,
      signOptions: { expiresIn: '60s' },
    }),
  ],
  providers: [AuthService, LocalStrategy],
  exports: [AuthService, JwtModule],
})

Answer 1

To allow for the registration of multiple variants of the same service, you're going to need to use a custom provider and wrapper module around the JwtModule. It would probably look something like this:

@Module({
  imports: [JwtModule.register({
    secret: secret1,
    signOptions: { expiresIn: '60s' },
  })],
  providers: [{
    provide: 'JwtSecret1Service',
    useExisting: JwtService,
  }],
  exports: ['JwtSecret1Service'],
})
export class JwtSecret1Module {}

Now you can use @Inject('JwtSecret1Service') to use this specific configuration so long as JwtSecret1Module has been added to the imports of the consuming module. You can do this with as many variants of the JwtService as you want, and each one will hold it's own configuration