export type AuditEventType = 'identity.created' | 'identity.deleted' | 'credential.issued' | 'credential.verified' | 'credential.revoked' | 'auth.signed' | 'auth.verified' | 'auth.failed' | 'keystore.init' | 'keystore.backup' | 'keystore.restore';
export interface AuditEvent {
    timestamp: string;
    type: AuditEventType;
    actor?: string;
    subject?: string;
    details?: Record<string, unknown>;
    success: boolean;
    error?: string;
}
export declare class AuditLog {
    private logPath;
    private enabled;
    constructor(basePath: string, enabled?: boolean);
    /**
     * Log an audit event
     */
    log(event: Omit<AuditEvent, 'timestamp'>): Promise<void>;
    /**
     * Read recent audit events
     */
    getRecent(limit?: number): Promise<AuditEvent[]>;
    /**
     * Query audit events by criteria
     */
    query(criteria: {
        type?: AuditEventType;
        actor?: string;
        subject?: string;
        since?: Date;
        until?: Date;
    }): Promise<AuditEvent[]>;
}
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