promotionalOfferSignatureV2
The promotional-offer signature you generate in a JSON Web Signature (JWS) format.
Declaration
string promotionalOfferSignatureV2Discussion
To provide a promotional-offer retention message, you need to cryptographically sign the offer and include it in the promotionalOffer parameter of your RealtimeResponseBody response.
To generate the promotional-offer signature in a JWS format, see Generating JWS to sign App Store requests, and follow the instructions for promotional-offer signatures, including the custom claims.
The App Store Server Library provides functions that simplify generating this signature. For more information, see Simplifying your implementation by using the App Store Server Library.