/**
 * AuditService — Event sourcing for governance audit trail.
 *
 * Subscribes to all domain events via IEventBus('*'), persists them via IAuditStore,
 * maintains an in-memory ring buffer for fast session queries.
 */
import type { IEventBus } from '../../shared/events/index.js';
import type { ILogger } from '../../shared/logger.js';
import type { IAuditStore, PersistedAuditEvent, AuditQuery, AuditQueryResult, AuditSummary, AuditSummaryOptions } from './audit-store.js';
/** Service interface for querying the audit trail */
export interface IAuditService {
    queryEvents(query: AuditQuery): Promise<AuditQueryResult>;
    getSummary(options?: AuditSummaryOptions): Promise<AuditSummary>;
    getRecentEvents(limit?: number): Promise<PersistedAuditEvent[]>;
    getEventCount(): Promise<number>;
}
export declare class AuditService implements IAuditService {
    private readonly store;
    private readonly logger;
    private readonly ringBuffer;
    private readonly ringBufferSize;
    private readonly unsubscribe;
    private nextBufferId;
    constructor(store: IAuditStore, eventBus: IEventBus, logger: ILogger, ringBufferSize?: number);
    queryEvents(query: AuditQuery): Promise<AuditQueryResult>;
    getSummary(options?: AuditSummaryOptions): Promise<AuditSummary>;
    getRecentEvents(limit?: number): Promise<PersistedAuditEvent[]>;
    getEventCount(): Promise<number>;
    /** Cleanup: unsubscribe from event bus */
    dispose(): void;
    private handleEvent;
    private serializeEvent;
}
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