Googlecheckout,Payment completion XML

Question

I got an xml after completing Google checkout payment.I need to update my database after completing the payment, The xml is like the following.In which stage like "merchant-calculation-callback" the payment completing?

<?xml version="1.0" encoding="UTF-8"?>
<merchant-calculation-callback 
     xmlns="http://checkout.google.com/schema/2"
     serial-number="c2406a1f-6971-4c0f-899e-415ef621dfb46">

Answer 1

<merchant-calculation-callback /> is used in Merchant Calculations API - its a callback in the Checkout process (aka Part 1 in the Google Checkout API)- Google sends the callback to your systems asking for calculations - e.g. shipping, tax, promotions, hence the name merchant-calculation-callback.

Part 1/Checkout - is the part where you send data to Google for Checkout. Therefore it is not going to give you information related to "after completing payment"

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Part 2/Processing Checkout Orders covers the APIs you can use to obtain order data "after completing payment" - primarily the Notification API. These APIs are what you must implement in order to get data for integration with your own order-processing systems (e.g. order status, payment status, saving order data, updating inventory, etc.).

• Order processing tutorial

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