/**
 * Storage Helpers
 * Single Responsibility: Common storage operations and error handling
 */
import type { OnboardingUserData } from "../../../domain/entities/OnboardingUserData";
export declare const DEFAULT_STORAGE_KEY = "@onboarding:completed";
export declare const USER_DATA_STORAGE_KEY = "@onboarding:user_data";
export declare function loadCompletionStatus(storageKey: string): Promise<boolean>;
export declare function loadUserData(defaultData: OnboardingUserData): Promise<OnboardingUserData>;
export declare function saveCompletionStatus(storageKey: string): Promise<void>;
export declare function saveUserData(data: OnboardingUserData): Promise<void>;
export declare function removeStorageKeys(storageKey: string): Promise<void>;
export declare function handleError(error: unknown, context: string): string;
export declare function logSuccess(_message: string): void;