cordova plugin add https://github.com/samyam-a/PayTM-PhoneGap-Plugin.git --variable GENERATE_URL=<Checksum Generation URL> --variable VERIFY_URL=<Checksum Validation Url> --variable MERCHANT_ID=<MerchantID> --variable INDUSTRY_TYPE_ID=<IndustryType> --variable WEBSITE=<WAPWebsiteName>
window.plugins.paytm.startPayment(txn_id, customer_id, email, phone, amount, successCallback, failureCallback);