import type { FolderName, OpfsKey, UrlString } from './types.js';
import { type EvictionIndexEntry } from './opfsEvictionIndex.js';
export interface CacheFileEntry {
    key: OpfsKey;
    size: number;
    lastAccessed: number;
    evictable: boolean;
}
export interface StorageEstimate {
    quota: number;
    usage: number;
}
export declare function isInSkipList(url: UrlString): boolean;
export declare function addToSkipList(url: UrlString): void;
export declare function getStorageEstimate(): Promise<StorageEstimate>;
export declare function getCacheLimit(estimate: StorageEstimate): number;
export declare function listCacheFilesWithMeta(dir: FileSystemDirectoryHandle): Promise<CacheFileEntry[]>;
export declare function getTotalCacheSize(entries: CacheFileEntry[]): number;
export declare function computeEvictionSet(entries: EvictionIndexEntry[], needToFree: number): OpfsKey[];
export declare function evictFiles(dir: FileSystemDirectoryHandle, keys: OpfsKey[]): Promise<void>;
export type EnsureSpaceResult = {
    ok: true;
    evictedKeys?: OpfsKey[];
} | {
    ok: false;
    reason: string;
};
export interface EnsureSpaceOptions {
    folderName: FolderName;
    onEvicted?: (keys: OpfsKey[]) => void;
    excludeKeyFromEviction?: OpfsKey;
}
export declare function ensureSpaceForWrite(dir: FileSystemDirectoryHandle, newFileSize: number, options: EnsureSpaceOptions): Promise<EnsureSpaceResult>;