I have an issue that I need to report with viber-bot-node npm package. Couldn't raise a issue in github since the maintainer has disabled raising any issues.

I'm using google app engine to tunnel my requests to localhost instead of using ngrok.

But the request never ever reaches the express routes set in the package, because the below if condition fails

const serverSideSignature = request.headers.X_Viber_Content_Signature || request.query.sig;
if (!messageValidatorService.validateMessage(serverSideSignature, request.body)) {
      self._logger.warn("Could not validate message signature", serverSideSignature);
      return;
    }

With requests like this the headers usually have hypenated property values and so the X._Viber_Content_Signature would be request.headers["x-viber-content-signature"].

Because of this the requests never reach defined express routes