This document describes the contract interswitch uses to authorize a PayWithMobile transaction against a value stored provider (VSP).

Overview
Once a PayWithMobile token has been generated, the token can be cashed-out/used to do a purchase transaction on POS. For a transaction to be successful, it has to be authorized against a value stored provider (VSP). This specification provides request to be sent by Interswitch for authorization and response expected from a VSP to indicate the state of the transaction. Note that all data formats and response definitions are in conformance with the REST standard.