If you are running the PayPal test mode, then you need to use PayPal.SANDBOX otherwise you should use the production environment PayPal.PRODUCTION
Also you have to generate a client id. To generate for SANDBOX client id click here.
How to integrate with Razorpay ?
To integrate your app with this payment gateway you need to have an account with razorpay.com . To apply for an account with razorpay click here
To configure razorpay change RazorpayKey with your key in src -> app -> common -> Config.js