/// <reference types="node" />
import type { EventEmitter } from 'events';
/**
 * Enforces a maximum running time for a single operation.
 *
 * The clock starts on `container:started` — emitted once the container is
 * actually running, i.e. *after* the image pull — so download time is not
 * counted against the operation's allotted run time. (The earlier `start`
 * event, which the provider emits before pulling, is deliberately not used.)
 * If the operation is still running `timeoutSeconds` later, `onTimeout` is
 * invoked; callers use this to abort the op. The timer is cleared as soon as
 * the operation settles (`exit`/`error`) or is torn down (`end`), so a normally
 * completing op never triggers it.
 *
 * The unit is seconds, matching the on-chain `job.timeout` convention.
 *
 * A missing, zero, or negative timeout disables enforcement (no-op).
 */
export declare function enforceOperationTimeout(emitter: EventEmitter, timeoutSeconds: number | undefined, onTimeout: () => void): void;