Razorpay is a secure payment gateway that enables businesses to accept online payments via cards, UPI, net banking, and wallets. It also supports international transactions across multiple currencies.
Razorpay integration is maintained and developed by Umesh Ravani.To support this development, please star the GitHub repository ❤️

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Installation

Before you can enable Razorpay, it must be installed. To do so, you need to add this line in Gemfile: 
bundle add spree_razorpay_checkout && bundle exec rails g spree_razorpay_checkout:install
After that, you need to make sure to restart the server.

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Connect Razorpay

Sign in to your Spree admin dashboard and navigate to Settings → Payments. Find Razorpay under Available Payment Methods and click Add. This will redirect you to the Razorpay setup form. You will need Key and Key Secret from your Razorpay dashboard credentials page.
To get your credentials, Navigate to Account & Settings → API Keys (under Website and app settings) → Generate new key to generate key for the selected mode.
You should see your live and test credentials. Copy both API key into Key and Secret into Key Secret, also Test API key into Test Key and Test Key Secret into Test Key Secret If you wish to test the Razorpay payments before going live, just select Test Mode option in Spree. Click Create to enable Razorpay as a payment method on your store.