/**
 * A Next.js server's half of a page's trace (utils README, "Web pages"). A
 * request a page made carries the page's `traceparent` (log/web sets it on
 * every same-origin fetch), so what the server does under these wrappers is
 * a child of that request, in the page's trace:
 *
 *     export const POST = traced("POST /api/vote", async (s, request) => {
 *       await s.span("turso insert vote", () => db.execute(...))
 *       return Response.json({ ok: true })
 *     })
 *
 *     // in a "use server" file
 *     export const vote = tracedAction("vote", async (s, id: string) => { ... })
 *
 * A request with no traceparent is a root span of its own. Each wrapper hands
 * flushLog to `after`, so a serverless instance frozen once its response is
 * sent never holds unsent events (LOG_SHIP, set on the deployment, is where
 * they go).
 */
import { type Span } from "../universal/log.js";
/** A route handler whose work is a span, joined to the caller's trace. */
export declare function traced<A extends unknown[], R>(name: string, handler: (s: Span, request: Request, ...rest: A) => Promise<R>): (request: Request, ...rest: A) => Promise<R>;
/** A server action whose work is a span, joined to the trace of the page that called it. */
export declare function tracedAction<A extends unknown[], R>(name: string, action: (s: Span, ...args: A) => Promise<R>): (...args: A) => Promise<R>;
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