import { AuditAction, AuditLogEntry } from '../../interfaces/brightpass';
/**
 * Abstract storage interface for audit log persistence.
 *
 * Implementations can use any storage backend (IndexedDB, localStorage,
 * in-memory, block store, etc.) without coupling the logger to a specific one.
 *
 * Requirements: 14.3, 14.4
 */
export interface IAuditLogStorage {
    append(entry: AuditLogEntry): Promise<void>;
    getByVaultId(vaultId: string, limit?: number): Promise<AuditLogEntry[]>;
}
/**
 * AuditLogger — logs vault and entry operations with timestamps and metadata.
 *
 * Uses dependency injection via IAuditLogStorage to remain browser-compatible
 * and free of file system or database-specific dependencies.
 *
 * Requirements: 14.1, 14.2, 14.3, 14.4
 */
export declare class AuditLogger {
    private readonly storage;
    constructor(storage: IAuditLogStorage);
    /**
     * Log an audit event for a vault operation.
     *
     * Creates an AuditLogEntry with a generated UUID, the current timestamp,
     * and the provided action/metadata, then persists it via the storage backend.
     *
     * Requirements: 14.1, 14.2
     */
    log(vaultId: string, memberId: string, action: AuditAction, metadata?: Record<string, string>): Promise<AuditLogEntry>;
    /**
     * Retrieve audit history for a vault, optionally limited.
     *
     * Requirements: 14.1
     */
    getHistory(vaultId: string, limit?: number): Promise<AuditLogEntry[]>;
}
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