tewtutin_23.ts

@Injectable()  
export class AppService extends TransactionFor<AppService> /* <-- step 1 */ {  
  constructor(  
    @InjectRepository(User)  
    private readonly userRepository: Repository<User>,  
    @InjectRepository(Purse)  
    private readonly purseRepository: Repository<Purse>,  
    private readonly appServiceV2: AppServiceV2,  
    moduleRef: ModuleRef, // <-- step 2
  ) {  
    super(moduleRef);  
  }
  // ...
}