[1.5.x] PostFinance Yellowpay/SwissPost integration

What does it do:
================
This contrib adds support for Swiss payment gateway POSTFINANCE payment integration in Switzerland.
The checkout button will redirect the customer to the gateway site. From there, the customer enters the payment details and pays.
Once payment is completed, the page will redirect back to your site to complete the order.



Requirements:
==============
  * You will of course need to have a POSTFINANCE Business account.
  * You will need to have CHF installed as a store currency.


Main features:
==============
  * Debug Mode (emails request vars to store owner)
  * Test mode Support
  * Supported Currencies check and auto-convert
  * Full support of error messages.


How to install it:
==================
1) Unzip and upload the contents of the upload folder to the root directory of your OpenCart installation.
2) From the admin menu, go to 'Admin->Users->User Groups'. Edit Top Administrator
3) Find and check the entries for any unchecked files in both modify and access. save.
4) From the admin menu, go to 'Extensions->Payment'.
5) Install the new module, and click edit to configure.


How to Setup your PostFinance Account:
===================
1. Login to your PostFinance account page
2. Click the "Technical Information" menu

Global Transaction Parameters Tab
- Default operation code: SALE
- Default data capture (payment) procedure: Data capture by the merchant (manual or automatic).
- Payment retry: 10
- Processing for individual transactions: Always online

Global Security Parameters Tab
- Compose the string to be hashed by concatenating the value of: Each parameter followed by the pass phrase
- Hash algorithm: SHA1
- Character encoding: Use the character encoding expected

Payment Page Layout Tab
- Leave empty

Data and Origin Verification Tab
- URL of the merchant page: http://www.yoursite.com/index.php?route=checkout/confirm;http://www.yoursite.com/index.php?route=checkout/guest_step_3
- SHA-IN Pass phrase: Anything you want. (Be sure it matches the one used in the OpenCart module config)

Transaction Feedback Tab
- HTTP redirection in the browser: Leave all empty
- I want to receive transaction feedback parameters on the redirection URLs: YES
- I want PostFinance to display a short text to the customer: YES
- Request Method: POST
-- Timing of the request: Always Online
- I want PostFinance to display a "processing" message to the customer during payment processing: YES
- SHA-OUT Pass phrase: Same as the SHA-IN Pass phrase on the last tab
-- Timing of the request: No Request

 

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