import { Logger } from '../utils';
/** @experimental */
export interface UploadListEntry {
    /** upload id */
    id: string;
    createdAt: string | Date | number;
    expiredAt?: string | Date | number;
    modifiedAt?: string | Date | number;
}
/** @experimental */
export interface UploadList {
    items: UploadListEntry[];
    prefix?: string;
}
export interface MetaStorageOptions {
    prefix?: string;
    suffix?: string;
    logger?: Logger;
}
/**
 * Stores upload metadata
 */
export declare class MetaStorage<T> {
    prefix: string;
    suffix: string;
    logger: Logger;
    constructor(config?: MetaStorageOptions);
    /**
     * Saves upload metadata
     */
    save(id: string, file: T): Promise<T>;
    /**
     * Deletes an upload metadata
     */
    delete(id: string): Promise<void>;
    /**
     * Retrieves upload metadata
     */
    get(id: string): Promise<T>;
    /**
     * Mark upload active
     */
    touch(id: string, file: T): Promise<T>;
    /**
     * Retrieves a list of uploads whose names begin with the prefix
     * @experimental
     */
    list(prefix?: string): Promise<UploadList>;
    getMetaName(id: string): string;
    getIdFromMetaName(name: string): string;
}
/**
 * @deprecated Use MetaStorage.suffix instead
 */
export declare const METAFILE_EXTNAME = ".META";