/**
 * Auditable storage wrapper
 * Adds audit trail logging to any StorageProvider
 */
import type { StorageProvider, VersionInfo } from '../types/storage.js';
/**
 * Audit log entry
 */
export interface AuditEntry {
    timestamp: string;
    action: 'set' | 'delete' | 'createVersion';
    key: string;
    details?: Record<string, unknown>;
}
/**
 * Auditable storage wrapper that logs all modifications
 */
export declare class AuditableStorage implements StorageProvider {
    private readonly storage;
    private readonly auditPath;
    private readonly enabled;
    constructor(storage: StorageProvider, baseDir: string, enabled?: boolean);
    /**
     * Append an entry to the audit log
     */
    private appendAudit;
    /**
     * Get the audit log entries
     */
    getAuditLog(): Promise<AuditEntry[]>;
    get<T>(key: string): Promise<T | null>;
    set<T>(key: string, value: T): Promise<void>;
    delete(key: string): Promise<void>;
    list(prefix: string): Promise<string[]>;
    exists(key: string): Promise<boolean>;
    getVersion<T>(key: string, version: number): Promise<T | null>;
    listVersions(key: string): Promise<VersionInfo[]>;
    createVersion(key: string): Promise<number>;
    /**
     * Get the underlying storage provider
     */
    getUnderlyingStorage(): StorageProvider;
}
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