International Business Machines Corporation

Paypal, Inc.

Carlos Antonio Lorenzo Hoyos

Viswanath Srikanth

Marcelo Perazolo

Andrea Jean Watkins Moryadas

Mark E Peters

Marc E Peters

A system and method for preventing multiple charges for a transaction in a payment system is presented. A payment system receives a payment operation request from the order system, and determines whether the payment operation is a duplication of a previous payment operation request. If so, the payment system retrieves stored financial transaction results and provides the financial transaction results to the order system. When the payment operation request is not a duplicate, the payment system contacts a payment provider to receive financial transaction results, which is passed to the order system and stored in a persistent data store.

System and method for preventing multiple charges for a transaction in a payment system

A system and method for state-based execution and recovery in a payment system is presented. A payment system uses a state machine to track completed sub-tasks using a state progress identifier and completion state data. When a failure occurs, stored completion state data and the state progress identifier indicate the last successfully completed sub-task. As such, when the payment system resumes payment operation execution after a failure, the state machine retrieves the stored completion state data and state progress identifier, and resumes execution based upon the retrieved information. As a result, the payment system continues payment operation execution at a point as to not duplicate the payment operation's previously completed sub-tasks.

System and method for state-based execution and recovery in a payment system

A system and method for optimal selection of payment authorization in a complex commerce system is presented. A commerce system uses an algorithm to select an optimum payment authorization for a particular payment deposit. The algorithm allows the commerce system to support multiple types of authorizations while minimizing the number of payment transactions if possible. The algorithm also handles payment instrument priority, sufficient authorization amount availability, and a selection of a favorable set of payment authorizations for which to apply the payment deposit. Once the algorithm selects an optimum payment authorization for a particular payment deposit, the commerce system applies the payment deposit towards the optimum payment authorization in order to receive funds from an external payment provider.

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Morrisville, NC, United States of America

Carlos Antonio Lorenzo Hoyos