如何在PayUMoney中获取服务器端哈希生成URL

Question

我已使用https://github.com/payu-intrepos/Android-SDK-Sample-App在我的应用中集成了PayUMoney，但需要在MainActivity中添加一些网址，例如

//TODO Below url is just for testing purpose, merchant needs to replace this with their server side hash generation url
                URL url = new URL("https://payu.herokuapp.com/get_hash");

以及

//TODO Deploy a file on your server for storing cardToken and merchantHash nad replace below url with your server side file url.
                    URL url = new URL("https://payu.herokuapp.com/store_merchant_hash");

storeMerchantHash函数中的

//TODO Replace below url with your server side file url.
                    URL url = new URL("https://payu.herokuapp.com/get_merchant_hashes");

在fetchMerchantHashes函数中。 这些类型的网址，我怎么能得到它？     我没有得到如何获取此URL，请指导我。