/**
 * W3C Trace Context - `traceparent` parsing/formatting + id generation. This is OpenTelemetry's
 * wire format for propagating a trace across services, so producing/forwarding it correctly is the
 * core of distributed tracing regardless of which backend ends up collecting the spans.
 *
 *   traceparent: 00-<32-hex trace-id>-<16-hex span-id>-<2-hex flags>
 *
 * Pure + dependency-free; the request plugin is a thin layer over this.
 */
/** A parsed inbound `traceparent`. */
export interface ParsedTraceparent {
    readonly traceId: string;
    readonly spanId: string;
    readonly sampled: boolean;
}
/**
 * Parse a `traceparent` header, or `null` if it's absent/malformed/version-unknown - per the spec,
 * a bad header means "start a fresh trace", never an error. Only version `00` is accepted.
 */
export declare function parseTraceparent(header: string | null | undefined): ParsedTraceparent | null;
/** Format a `traceparent` header value (version `00`). */
export declare function formatTraceparent(traceId: string, spanId: string, sampled: boolean): string;
/** A fresh 16-byte (32-hex) trace id. */
export declare function generateTraceId(): string;
/** A fresh 8-byte (16-hex) span id. */
export declare function generateSpanId(): string;
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