Exposed #process_refund for Payment

Author: AnkurGel

README.md

@@ -192,6 +192,15 @@ client.create_refund do |refund|
   refund.body       = 'Customer is not satisifed'
 end
 ```
+or refund a `payment` directly:
+```ruby
+payment = client.payment_detail('MOJO5c05000F97367750')
+payment.process_refund(type: 'QFL', reason: 'User wanted different version') #or
+payment.process_refund do |refund|
+  refund.type = 'QFL'
+  refund.reason = 'User wanted different version'
+end
+```
 
 #### Details of a refund
 ```ruby

lib/client/payment.rb

@@ -43,6 +43,13 @@ def initialize(payment, client)
       @client = client # Reference to client
     end
 
+    # Process refund for this payment
+    # payment.process_refund(type: 'QFL', body: 'Customer is not satisfied')
+    def process_refund(hash = {}, &block)
+      hash[:payment_id] = self.payment_id
+      @client.create_refund(hash, &block)
+    end
+
     def to_s
       sprintf("Instamojo Payment(payment_id: %s, quantity: %s, amount: %s, status: %s, link_slug: %s, buyer_name: %s)",
               payment_id, quantity, amount, status, link_slug, buyer_name)