includeClientPayload property
Available in OpenIAP Spec 2.4.0 / openiap-apple 2.4.1 / openiap-google 2.4.1. Include the product's public IAPKit client payload in a valid Apple or Google verification response. Horizon and Amazon accept this option for cross-platform request compatibility but omit the payload. Defaults to false so existing response shapes and bandwidth remain unchanged.
Implementation
final bool? includeClientPayload;