type TraceVersion = "00";
type TraceFlag = "00" | "01";
type TraceIDStr = Lowercase<`${string & {
    length: 32;
}}`>;
type SpanIDStr = Lowercase<`${string & {
    length: 16;
}}`>;
/**
 * Traceparent is the header used to propagate trace context between services. It is formatted as follows:
 *
 *  <version: 2 chars>-<trace-id: 32 chars>-<span-id: 16 chars>-<flags: 2 chars>
 *
 * So for example:
 *   00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01
 */
export type TraceParent = `${TraceVersion}-${TraceIDStr}-${SpanIDStr}-${TraceFlag}`;
/**
 * Fixed 16-byte array for the 128-bit trace ID.
 */
export type TraceID = Uint8Array;
/**
 * Fixed 8-byte array for the 64-bit span ID.
 */
export type SpanID = Uint8Array;
/**
 * The HTTP Header used to propagate trace context between services.
 */
export declare const TraceParentHeader = "traceparent";
/**
 * The HTTP Header used to propagate trace state between services.
 */
export declare const TraceStateHeader = "tracestate";
/**
 * Generate a new trace ID.
 */
export declare function newTraceID(): TraceID;
/**
 * Generate a new span ID.
 */
export declare function newSpanID(): SpanID;
/**
 * Parses the traceparent header, returning the trace context if the header is valid, or undefined if the header is
 * invalid.
 */
export declare function parseTraceParent(traceParent: string): [TraceID | undefined, SpanID | undefined];
/**
 * Generates a traceparent header from the given trace ID and span ID.
 */
export declare function traceParent(traceID: TraceID, spanID: SpanID): TraceParent;
export {};