import { type CallHandler, type ExecutionContext, type NestInterceptor } from "@nestjs/common";
import { Observable } from "rxjs";
import type { OpenTelemetryModuleOptions } from "../interfaces";
/**
 * Opens a wide event for each request and flushes the accumulated
 * attributes onto the span that was active when the request entered the
 * interceptor (usually the root HTTP span created by instrumentation).
 *
 * Register globally with APP_INTERCEPTOR or per controller with
 * UseInterceptors.
 *
 * @publicApi
 */
export declare class WideEventInterceptor implements NestInterceptor {
    private readonly options?;
    constructor(options?: OpenTelemetryModuleOptions | undefined);
    intercept(executionContext: ExecutionContext, next: CallHandler): Observable<unknown>;
    private rootSpanFromRequest;
    /**
     * Picks the span the wide event should be written to, preferring the
     * local-root span (when the WideEventSpanProcessor is registered), then the
     * middleware-captured root span, then the interceptor-time active span —
     * skipping any that have already ended.
     */
    private targetSpan;
    private pickSpan;
    private seed;
    private flush;
}