tokenMiddleware.ts

export const tokenMiddleware = (tokenValidator: TokenValidator) => {
  return async (req: Request, res: Response, next: NextFunction) => {
    const apiToken = req.header('authorization');
    if (!apiToken) {
      return res
        .status(401)
        .send({ message: 'You must authenticate to use Unleash on the Edge' });
    }

    await tokenValidator.registerToken(apiToken);

    if (!(await tokenValidator.isValid(apiToken))) {
      return res.status(401).send({
        message: 'The provided token is invalid.',
      });
    }

    req.token = apiToken;
    return next();
  };
};