import type { SegmentVaryPath } from './vary-path';
import { type UnknownMapEntry } from './cache-map';
export type BFCacheEntry = {
    rsc: React.ReactNode | null;
    prefetchRsc: React.ReactNode | null;
    head: React.ReactNode | null;
    prefetchHead: React.ReactNode | null;
    ref: UnknownMapEntry | null;
    size: number;
    staleAt: number;
    version: number;
};
export declare function invalidateBfCache(): void;
export declare function writeToBFCache(now: number, varyPath: SegmentVaryPath, rsc: React.ReactNode, prefetchRsc: React.ReactNode, head: React.ReactNode, prefetchHead: React.ReactNode): void;
export declare function writeHeadToBFCache(now: number, varyPath: SegmentVaryPath, head: React.ReactNode, prefetchHead: React.ReactNode): void;
export declare function readFromBFCache(varyPath: SegmentVaryPath): BFCacheEntry | null;
export declare function readFromBFCacheDuringRegularNavigation(now: number, varyPath: SegmentVaryPath): BFCacheEntry | null;