import type { SerializedTraceData } from '@sentry/types';
/**
 * Extracts trace propagation data from the current span or from the client's scope (via transaction or propagation
 * context) and serializes it to `sentry-trace` and `baggage` values to strings. These values can be used to propagate
 * a trace via our tracing Http headers or Html `<meta>` tags.
 *
 * This function also applies some validation to the generated sentry-trace and baggage values to ensure that
 * only valid strings are returned.
 *
 * @returns an object with the tracing data values. The object keys are the name of the tracing key to be used as header
 * or meta tag name.
 */
export declare function getTraceData(): SerializedTraceData;
/**
 * Tests string against baggage spec as defined in:
 *
 * - W3C Baggage grammar: https://www.w3.org/TR/baggage/#definition
 * - RFC7230 token definition: https://datatracker.ietf.org/doc/html/rfc7230#section-3.2.6
 *
 * exported for testing
 */
export declare function isValidBaggageString(baggage?: string): boolean;
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