RevenueCat

import AdSupport
// ...
Purchases.configure(withAPIKey: "public_sdk_key")
// ...

Task {
    let base = await AppstackAttributionSdk.shared.getAttributionParams() ?? [:]
    var params = base
    if let id = AppstackAttributionSdk.shared.getAppstackId() {
        params["appstack_id"] = id
    }

    // Forward to RevenueCat — syncs attributes and fetches fresh offerings
    // so Appstack-based targeting is applied before the callback returns.
    Purchases.shared.attribution.setAppstackAttributionParams(params) { offerings, error in
        // Use `offerings` to present the correct paywall for this user
    }
}