/**
 * Versioned storage wrapper
 * Adds automatic versioning to any StorageProvider
 */
import type { StorageProvider, VersionInfo } from '../types/storage.js';
/**
 * Configuration for versioned storage
 */
export interface VersionedStorageConfig {
    maxVersions: number;
}
/**
 * Versioned storage wrapper that adds automatic versioning to any storage provider
 * Uses full snapshot strategy - each version is a complete copy
 */
export declare class VersionedStorage implements StorageProvider {
    private readonly storage;
    private readonly config;
    constructor(storage: StorageProvider, config?: Partial<VersionedStorageConfig>);
    /**
     * Get a value by key (delegates to underlying storage)
     */
    get<T>(key: string): Promise<T | null>;
    /**
     * Set a value by key, creating a version if data already exists
     */
    set<T>(key: string, value: T): Promise<void>;
    /**
     * Delete a value by key (delegates to underlying storage)
     */
    delete(key: string): Promise<void>;
    /**
     * List all keys with a given prefix (delegates to underlying storage)
     */
    list(prefix: string): Promise<string[]>;
    /**
     * Check if a key exists (delegates to underlying storage)
     */
    exists(key: string): Promise<boolean>;
    /**
     * Get a specific version of a value (delegates to underlying storage)
     */
    getVersion<T>(key: string, version: number): Promise<T | null>;
    /**
     * List all versions for a key (delegates to underlying storage)
     */
    listVersions(key: string): Promise<VersionInfo[]>;
    /**
     * Create a new version for a key (delegates to underlying storage)
     */
    createVersion(key: string): Promise<number>;
    /**
     * Prune old versions to stay within maxVersions limit
     */
    private pruneOldVersions;
    /**
     * Get the underlying storage provider
     */
    getUnderlyingStorage(): StorageProvider;
}
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