/**
 * Base adapter utilities and factory
 */
import type { SecureStorageAdapter, SecureStorageOptions, StorageResult } from "./types";
/**
 * Create a namespaced key
 */
export declare function namespacedKey(namespace: string | undefined, key: string): string;
/**
 * Create a success result
 */
export declare function ok<T>(value: T): StorageResult<T>;
/**
 * Create an error result
 */
export declare function err<T>(error: string): StorageResult<T>;
/**
 * Wrap an async operation with error handling
 */
export declare function wrap<T>(fn: () => Promise<T>, errorPrefix: string): Promise<StorageResult<T>>;
/**
 * Abstract base class for secure storage adapters
 */
export declare abstract class BaseSecureStorageAdapter implements SecureStorageAdapter {
    abstract readonly name: string;
    abstract readonly available: boolean;
    protected readonly namespace: string;
    protected readonly options: SecureStorageOptions;
    constructor(options?: SecureStorageOptions);
    protected key(rawKey: string): string;
    abstract set(key: string, value: string): Promise<StorageResult<void>>;
    abstract get(key: string): Promise<StorageResult<string | null>>;
    abstract delete(key: string): Promise<StorageResult<void>>;
    abstract has(key: string): Promise<StorageResult<boolean>>;
}
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