import type { ClsService } from 'nestjs-cls';
import type { HttpCaptureOptions } from './http-request.interface.js';
export declare function resolveTraceIdHeader(option: HttpCaptureOptions['propagateTraceId']): string | undefined;
export declare function outgoingTraceId(cls: ClsService | undefined, header: string | undefined): string | undefined;
export declare function hasHeader(headers: unknown, header: string): boolean;