README.md in przelewy24_payment-0.1.2 vs README.md in przelewy24_payment-0.1.3

@@ -24,13 +24,18 @@
 
 ```ruby
 Przelewy24Payment.setup do |config|
   config.seller_id = 'your_seller_id'
   config.language = 'pl'
-  config.mode = :development
-  config.error_url = 'http://localhost:3000/your_payment/comeback'
-  config.comeback_url = 'http://localhost:3000/your_payment/comeback'
+  config.mode = Rails.env.to_sym  # or just put :development or :production symbol
+  config.error_url = '/your_controller/comeback'
+  config.comeback_url = '/your_controller/comeback'
+  config.hostname = {
+      :development => "http://localhost:3000",
+      :production => "your.domain",
+      :staging => "staging.domain"
+  }
 end
 ```
 
 ## Usage
 
@@ -48,10 +53,11 @@
 class YourPaymentController < ApplicationController
   include Przelewy24PaymentController
   ...
 
   # after success payemnt this method will be trigger
+  # so you can do whatever you want
   def payment_success(payment_params)
     # payment_params returns hash with:
     # p24_session_id
     # p24_order_id
     # p24_kwota
@@ -61,11 +67,12 @@
 
     # e.g
     # payment = Payment.find_by_session_id(payment_params[:p24_session_id])
   end
 
-  # after error payemnt this method will be trigger
+  # after error payment this method will be trigger
+  # so you can do whatever you want
   def payment_error(payment_params, code, description)
     # payment_params returns hash with:
     # p24_session_id
     # p24_order_id
     # p24_kwota
@@ -75,10 +82,12 @@
     #
     # code return error code
     # description return error description
   end
 
+  # method to setup params to verify it final verifyciation
+  # so you can do whatever you want
   def payment_verify(response_params)
     # e.g:
     # payment = Payment.find_by_session_id(response_params[:p24_session_id])
 
     # you must return hash with amount which was save in your db and optional if you use your crc_key
@@ -106,16 +115,16 @@
 
   def your_payment
     session_id = Przelewy24Payment.friendly_token[0,20]
     value = give_your_amount
     @data = { :session_id =>  session_id,
-              :description => "opis",
+              :description => "opis",           # optional param
               :value => value,
-              :client => 'Adam Nowak',
-              :address => 'Powstancow 22/2',
-              :zipcode => '53-456',
-              :city => 'Wroclaw',
-              :country => 'Polska',
+              :client => 'Adam Nowak',          # optional param
+              :address => 'Powstancow 22/2',    # optional param
+              :zipcode => '53-456',             # optional param
+              :city => 'Wroclaw',               # optional param
+              :country => 'Polska',             # optional param
               :email => '[e-mail]',
               # adding this params, you overwrite your config settings so this param is optional
               # :language => 'pl',
               # :crc => your_crc_key,
               # :seller_id => seller_id