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Defining the steps of the payment process - As seen by the merchant

The online payment process on the merchant side follows these steps:

Figure 1. Payment process - as seen by the merchant
  1. The buyer validates the shopping cart.
  2. The merchant website creates a form using the data from the buyer's cart.
  3. The merchant website redirects the buyer to the payment gateway via an HTTPS HTML POST form. The parameters are described in the chapter Generating a payment form.
  4. The buyer enters their payment information, and the gateway proceeds to the payment.
  5. The gateway automatically informs the merchant website about the result (depending on the configuration), see chapter Setting up notifications.
  6. The merchant website analyzes and processes the payment result.
  7. The merchant updates their database (order status, stock status, etc.).
  8. The buyer is informed about the result and can return to the merchant website to see their order status.
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