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
    }
}

// ...
Purchases.configure(this, "public_sdk_key")
// ...

fun syncRevenueCatAttribution() {
    val base = AppstackAttributionSdk.getAttributionParams()
    val params = base.toMutableMap()
    AppstackAttributionSdk.getAppstackId()?.let { params["appstack_id"] = it }

    // Forward to RevenueCat — syncs attributes and fetches fresh offerings
    // so Appstack-based targeting is applied before the callback returns.
    Purchases.sharedInstance.setAppstackAttributionParams(
        params,
        object : SyncAttributesAndOfferingsCallback {
            override fun onSuccess(offerings: Offerings) {
                // Use `offerings` to present the correct paywall for this user
            }
            override fun onError(error: PurchasesError) { /* handle error */ }
        }
    )
}

// Call syncRevenueCatAttribution() after Appstack initialization and before loading offerings or paywalls.

// ...
Purchases.configure({ apiKey: "public_sdk_key" });
// ...

const base = (await AppstackSDK.getAttributionParams()) ?? {};
const params = { ...base };
const id = await AppstackSDK.getAppstackId();
if (id != null) {
  params["appstack_id"] = id;
}

// Forward to RevenueCat — syncs attributes and fetches fresh offerings
// so Appstack-based targeting is applied before the promise resolves.
const offerings = await Purchases.setAppstackAttributionParams(params);
// Use `offerings` to present the correct paywall for this user

// ...
await Purchases.configure(PurchasesConfiguration("public_sdk_key"));
// ...

final base = await AppstackPlugin.getAttributionParams() ?? <String, dynamic>{};
final params = Map<String, dynamic>.from(base);
final id = await AppstackPlugin.getAppstackId();
if (id != null) {
  params['appstack_id'] = id;
}

// Forward to RevenueCat — syncs attributes and fetches fresh offerings
// so Appstack-based targeting is applied before the await returns.
final Offerings offerings = await Purchases.setAppstackAttributionParams(params);
// Use `offerings` to present the correct paywall for this user