/**
 * Remove the tracking headers. This is used in our split transport to ensure that we remove the headers that
 * are not used by the other systems.
 *
 * @param {unknown} x The headers to remove the tracking headers from
 */
export declare function mutateRemoveTrackingHeaders(x?: unknown): void;
/**
 * Update the headers with the trace header and breadcrumb.
 *
 * These trace headers are used in the imply ingestion pipeline to trace the request.
 * And the breadcrumb is used to get finer grain details in the trace.
 *
 * Then there are the trace headers that are part of the W3C trace context standard.
 *
 * @param {string} crumb The crumb to add to the breadcrumb
 * @returns {Function} A function that updates the headers
 */
export declare function headersUpdate(crumb: string): (x: Record<string, string>) => {
    traceparent: `00-${string}-${string}-${string}`;
    tracestate: string;
    "X-Alchemy-Client-Breadcrumb": string;
    "X-Alchemy-Client-Trace-Id": string;
};