import { TraceParent } from "../models/trace-parent.model";
/**
 * Reads W3C Trace Context `traceparent` values (https://www.w3.org/TR/trace-context/).
 *
 * The format is `version-traceId-parentId-flags`, all lowercase hex:
 * `00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01`.
 *
 * The 32 hex characters of the trace id are returned as a UUID, the form Pristine
 * uses for `Trace.id`, so a trace continued from a caller looks like one started here.
 * Transport-agnostic: HTTP reads it from a header, a queue could read it from a message
 * attribute.
 */
export declare class TraceParentParser {
    private static readonly InvalidVersion;
    private static readonly ZeroTraceId;
    private static readonly ZeroParentId;
    private static readonly SampledFlag;
    /**
     * Returns the parsed value, or `undefined` when the value is missing or invalid. The
     * spec says an invalid `traceparent` must be ignored, so this never throws.
     * @param value The raw `traceparent` value.
     */
    static parse(value: string | undefined): TraceParent | undefined;
    /**
     * `4bf92f3577b34da6a3ce929d0e0e4736` → `4bf92f35-77b3-4da6-a3ce-929d0e0e4736`.
     */
    private static toUuid;
}