/**
 * The context for the current request.
 */
export interface Context {
    traceID: Uint8Array;
    spanID: Uint8Array;
    parentSpanID?: Uint8Array;
    extRequestID?: string;
    correlationID?: string;
}
/**
 * Used to track the current request context.
 */
export default class ReqTrack {
    private readonly localStorage;
    /**
     * run the given request handler with the given context, such that any calls to `current()` within the request handler
     * will return the given context.
     */
    run<R>(ctx: Context, requestHandler: () => Promise<R>): Promise<R>;
    /**
     * Returns the current context for the current request, or undefined if there is no current request.
     */
    current(): Context | undefined;
    /**
     * Returns a traceparent value for the current span.
     */
    currentTraceParent(): string | undefined;
}