/** Marks the containers this library owns, so merchant-supplied nodes survive. */
export declare const KLASHA_CONTAINER_ATTRIBUTE = "data-react-klasha-container";
/** A container id that is unique for the lifetime of the page. */
export declare const nextKlashaContainerId: () => string;
/**
 * Returns the element with `id`, creating it only when it is missing.
 *
 * 0.0.x appended a `<div id="ktest">` on every effect run, so remounting or
 * rendering two payment components produced duplicate DOM ids and the checkout
 * rendered into whichever one the browser happened to return first.
 */
export declare const ensureKlashaContainer: (id: string) => HTMLElement | null;
/** Removes a container, but only if this library created it. */
export declare const removeKlashaContainer: (id: string) => void;
/**
 * Owns the checkout container for one hook instance.
 *
 * @param containerId use a specific element instead of a generated one. The
 *   element is reused if it already exists and is left in place on unmount.
 * @returns the id to hand to the Klasha client as `containerId`.
 */
export default function useKlashaContainer(containerId?: string): string;