Online transaction processing system for transactions including multiple product suppliers

A method of processing an online transaction, the method comprising:

• receiving a refund request at an online transaction processing system, the refund request identifying a first database record that defines an itinerary, a first product in the itinerary to be refunded, and a second product in the itinerary to be refunded;
• retrieving, by the online transaction processing system from the first database record, first data defining a merchant for the first product as a supplier of the first product, a first payment made by a buyer to the merchant for the first product, a seller as the merchant for the second product, and a second payment made by the buyer to the merchant for the second product;
• and
• determining, by the online transaction processing system based on the first data, a first amount to be refunded to the buyer from the seller, a second amount to be refunded to the buyer from the supplier of the first product, and a third amount to be refunded to the seller from the supplier of the second product.

A computer program product comprising:

• a non-transitory computer-readable storage medium;
• and
• program code stored on the non-transitory computer-readable storage medium that, when executed by one or more processors, causes the one or more processors to:
• receive a refund request identifying a database record that defines an itinerary, a first product in the itinerary to be refunded, and a second product in the itinerary to be refunded;
• retrieve, from the database record, data defining a merchant for the first product as a supplier of the first product, a first payment made by a buyer to the merchant for the first product, a seller as the merchant for the second product, and a second payment made by the buyer to the merchant for the second product;
• and
• determine, based on the data, a first amount to be refunded to the buyer from the seller, a second amount to be refunded to the buyer from the supplier of the first product, and a third amount to be refunded to the seller from the supplier of the second product.