import type { opentelemetry } from "./lib";
/**
 * Starts a new Span and calls the given function passing it the created span as first argument.
 * Additionally the new span gets set in context and this context is activated for the duration of the function call.
 * That means that any following span will have this span as a parent span.
 * Will also set the core session context as attributes on the span.
 *
 * The span is not ended automatically and `span.end()` has to be called explicitly.
 *
 * @param name The name of the span
 * @param fn The callback function which executes under the span
 * @returns A promise resolving with the callback's return value
 */
export declare function startActiveSpan<T>(name: string, fn: (span: opentelemetry.api.Span) => Promise<T>): Promise<T>;
/**
 * Like `startActiveSpan` but automatically ends the span when the Promise returned by the callback resolves.
 *
 * @param name The name of the span
 * @param fn The callback function which executes under the span
 * @returns A promise resolving with the callback's return value
 */
export declare function wrapActiveSpan<T>(name: string, fn: (span: opentelemetry.api.Span) => Promise<T>): Promise<T>;
/**
 * Starts a new Span.
 * Start the span without setting it on context.
 * That means it will not automatically be a parent span for subsequent spans.
 * Best used to trace linear and synchronous codepaths.
 *
 * Will also set the core session context as attributes on the span.
 *
 * @param name The name of the span
 * @returns The span
 */
export declare function startSpan(name: string): opentelemetry.api.Span;