/**
 * Audit trail and compliance export.
 *
 * Exports all memory-lifecycle events from the local store in a
 * tamper-evident format. Each export includes a chain hash: every event
 * record includes a `prevHash` field linking it to the previous event,
 * making any after-the-fact modification detectable.
 *
 * Output formats: JSON (default) or CSV.
 */
import type { MemoryStore } from "../db/store.js";
export interface AuditExportRow {
    seq: number;
    id: string;
    type: string;
    memoryId: string | null;
    payload: Record<string, unknown>;
    machine: string;
    schemaVersion: number;
    createdAt: string;
    hash: string;
    prevHash: string;
}
export interface AuditExport {
    exportedAt: string;
    machine: string;
    totalEvents: number;
    chainHash: string;
    events: AuditExportRow[];
}
/**
 * Export all events from the store as a tamper-evident audit trail.
 * Each event is chained to the previous one via a SHA-256 hash.
 */
export declare function exportAuditTrail(store: MemoryStore, opts?: {
    limit?: number;
    sinceSeq?: number;
}): Promise<AuditExport>;
/**
 * Verify the integrity of an audit export by recomputing the chain hashes.
 * Returns true if all hashes match (no tampering detected).
 */
export declare function verifyAuditTrail(exportData: AuditExport): Promise<boolean>;
/**
 * Render an audit export as CSV.
 */
export declare function renderCsv(exportData: AuditExport): string;
/**
 * Render a summary of the audit export for CLI display.
 */
export declare function renderAuditSummary(exportData: AuditExport): string;