import type { Span } from '@opentelemetry/api';
import { type ArvoEvent, type ArvoOrchestrationSubjectContent } from 'arvo-core';
import type { SyncEventResource } from '../../SyncEventResource';
/**
 * Validates and parses an orchestration event's subject.
 *
 * Ensures the event subject is valid and matches the expected orchestrator source.
 * Returns null if validation fails, allowing graceful handling of mismatched events.
 *
 * @returns Parsed subject content or null if validation fails
 */
export declare const validateAndParseSubject: (event: ArvoEvent, expectedSource: string, syncEventResource: SyncEventResource<any>, span: Span, handlerType: "orchestrator" | "resumable") => ArvoOrchestrationSubjectContent | null;