// Pseudo-code example (refer to Branch docs for actual implementation)

BranchSdk.initSession().listen((data) {
  final referrerCode = data['referrerCode'];
  if (referrerCode != null) {
    // Save code to use during registration
    saveReferralCode(referrerCode);
  }
});

// Refer to Adjust Flutter SDK for deep link handling
Adjust.onDeeplinkResponseReceived = (String? deepLink) {
  if (deepLink != null) {
    final uri = Uri.parse(deepLink);
    final referrerCode = uri.queryParameters['referrerCode'];
    if (referrerCode != null) {
      saveReferralCode(referrerCode);
    }
  }
};

import 'package:gameball_sdk/gameball_sdk.dart';

final attributes = CustomerAttributesBuilder()
    .displayName("Jane Smith")
    .email("newuser@example.com")
    .mobile("+1234567890")
    .build();

final request = InitializeCustomerRequestBuilder()
    .customerId("new-customer-456")
    .customerAttributes(attributes)
    .referralCode(savedReferralCode) // Include captured referral code
    .build();

final gameballApp = GameballApp.getInstance();
gameballApp.initializeCustomer(request, (response, error) {
  if (error == null) {
    print("Customer registered with referral");
    clearReferralCode(); // Clear stored code after success
  } else {
    print("Error: $error");
  }
});