context.waitForEvent

import { serve } from "@upstash/workflow/nextjs";

export const { POST } = serve<{ topic: string }>(async (context) => {
  const request = context.requestPayload;

  const {
    eventData,
    timeout,
  } = await context.waitForEvent("wait for some event", "my-event-id", {
    timeout: "1000s", // 1000 second timeout
  });
});