sales and orders methods updates

app/controllers/api/payments_controller.rb

@@ -1,8 +1,18 @@
 class Api::PaymentsController < ActionController::API
 
 
-  #Show customer by ID
+  #Payment by Invoice ID
+  # Payment Method - [Cash | CreditNote | VISA | MASTER | etc..]
+  # Invoice No | Amount
+  # Output
+  # Status - [True/False] | Invoice | error_message (* when status false)
   def  create
-    @customer = Customer.find_by(params[:id])
+    @invoice = Sale.find(params[:invoice_id])
+  end
+
+  # Update of payment status from the external party
+  # Invoice No | Payment ID | External params [] (* third party references and status)
+  #
+  def update
   end
 end