/**
 * Small event utilities for Node-style emitters.
 *
 * Prefer keeping this separate from the main stream implementation so other
 * modules (e.g. archive) can reuse it without pulling in the whole stream API.
 */
import type { EventEmitterLike } from "../types.js";
/**
 * Resolve when an emitter fires `event`, reject on `error`.
 */
export declare function onceEvent(emitter: EventEmitterLike, event: string): Promise<void>;