import type { Storage } from 'unstorage';
import type { VNode, RendererNode, RendererElement, Slots, ComponentInternalInstance } from 'vue';
import type { ComponentCacheItem } from './../../../types/index.js';
import type { Props } from '../shared/index.js';
export type RenderCacheableSlotVNode = VNode<RendererNode, RendererElement, {
    [key: string]: any;
}>;
/**
 * Build the cache key.
 *
 * A custom key is used if provided. If not, a key is generated based on the
 * props of the given vnode. If no props are available or if the component has
 * no name, return.
 */
export declare function getCacheKey(props: Props, vnode: RenderCacheableSlotVNode): string | undefined;
export declare function getComponentName(vnode: RenderCacheableSlotVNode): string | undefined;
/**
 * Render the contents of a slot and return the markup.
 *
 * This is approximately the same behavior as in vue/server-renderer. The
 * ssrRenderSlotInner pushes the rendered fragments of the entire tree in the
 * buffer array. Then the unrollBuffer method is called which merges the
 * nested array into a single string of markup.
 */
export declare function renderSlot(slots: Slots, parent: ComponentInternalInstance): Promise<string | Error>;
/**
 * Check the cache for an already rendered component. If available, return the
 * data.
 */
export declare function getCachedComponent(storage: Storage, cacheKey: string): Promise<ComponentCacheItem | undefined>;