v13.3.2

Add support for promotional offers on Apple AppStore

You can order a discount offer by providing additional data to "offer.order()" like so:

offer.order({
  appStore: {
    discount: {
      id: "discount-id",
      key: "...",
      nonce: "...",
      signature: "...",
      timestamp: "...",
    }
  }
});

Check Apple documentation about the meaning of those fields and how to fill them. https://developer.apple.com/documentation/storekit/in-app_purchase/original_api_for_in-app_purchase/subscriptions_and_offers/setting_up_promotional_offers?language=objc

You can check this old example server here: https://github.com/j3k0/nodejs-suboffer-signature-server