export declare function gen(pkg: string, ver: string, { agent, signal, endpoint, }?: {
    agent?: string | undefined;
    signal?: AbortSignal | undefined;
    endpoint?: string | undefined;
}): Promise<Response>;
export type Result = Readonly<{
    name: string;
    version: string;
    shasum: string;
    sha512?: string;
}>;
export declare function npm(pkg: string, ver: string, endpoint?: string): Promise<Result>;
export declare function npm_task(task: () => Promise<Response>): Promise<Result>;