/**
 * Unified storage adapters for web platform storage APIs.
 * Provides a consistent, promise-based interface with predictable errors.
 */
/**
 * Common interface for all storage adapters.
 * All methods return promises for a unified async API.
 */
export interface StorageAdapter {
    /**
     * Retrieve a value by key.
     * @param key - The storage key
     * @returns The stored value or null if not found
     */
    get<T>(key: string): Promise<T | null>;
    /**
     * Store a value by key.
     * @param key - The storage key
     * @param value - The value to store
     */
    set<T>(key: string, value: T): Promise<void>;
    /**
     * Remove a value by key.
     * @param key - The storage key
     */
    remove(key: string): Promise<void>;
    /**
     * Clear all stored values.
     */
    clear(): Promise<void>;
    /**
     * Get all storage keys.
     * @returns Array of all keys
     */
    keys(): Promise<string[]>;
}
/**
 * IndexedDB configuration options.
 */
export interface IndexedDBOptions {
    /** Database name */
    name: string;
    /** Object store name */
    store: string;
    /** Database version (optional) */
    version?: number;
}
/**
 * Storage factory providing access to different storage adapters.
 */
export declare const storage: {
    /**
     * Create a localStorage adapter.
     * @returns StorageAdapter wrapping localStorage
     */
    local(): StorageAdapter;
    /**
     * Create a sessionStorage adapter.
     * @returns StorageAdapter wrapping sessionStorage
     */
    session(): StorageAdapter;
    /**
     * Create an IndexedDB adapter with key-value interface.
     * @param options - Database and store configuration
     * @returns StorageAdapter wrapping IndexedDB
     */
    indexedDB(options: IndexedDBOptions): StorageAdapter;
};
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