export declare function fetchMetadataAction(url: string): Promise<{
    metadata: any;
}>;
export declare function batchFetchMetadataAction(urls: string[], bustCache?: boolean): Promise<{
    results: ({
        url: string;
        error: string;
        metadata: null;
    } | {
        url: string;
        error: null;
        metadata: any;
    })[];
}>;