import { File, MetaStorage, MetaStorageOptions, UploadList } from '@uploadx/core';
import { GoogleAuth, GoogleAuthOptions } from 'google-auth-library';
export interface GCSMetaStorageOptions extends GoogleAuthOptions, MetaStorageOptions {
    bucket?: string;
}
export declare class GCSMetaStorage<T extends File = File> extends MetaStorage<T> {
    readonly config: GCSMetaStorageOptions;
    authClient: GoogleAuth;
    storageBaseURI: string;
    uploadBaseURI: string;
    constructor(config?: GCSMetaStorageOptions);
    /**
     * Returns metafile url
     * @param id - upload id
     */
    getMetaPath(id: string): string;
    save(id: string, file: T): Promise<T>;
    delete(id: string): Promise<void>;
    get(id: string): Promise<T>;
    list(prefix: string): Promise<UploadList>;
}