Products and purchases

Purchases sends the identifiers in PurchaseConfiguration to StoreKit. Price, subscription period, and availability come directly from StoreKit.

let products = try await Purchases.shared.products()

guard let yearlyProduct = products.first(where: {
    $0.id == "time.plus.yearly"
}) else {
    return
}

let result = try await Purchases.shared.purchase(yearlyProduct)

PurchaseResult distinguishes completion, approval pending, and user cancellation. Transaction verification and store failures are thrown as errors.