export type AuthConfig = {
    type: "basic";
    auth: string;
    host: string;
};
export type RetryConfig = {
    codes: number[];
    base: number;
    maxRetries: number;
};
export type FetchConfig = {
    auth?: AuthConfig;
    concurrent?: number;
    retry?: Partial<RetryConfig>;
    safe?: boolean;
};
export declare function enhanced_fetch(config: FetchConfig, start?: typeof fetch): typeof fetch;
export declare function limit_fetch_per_domain(fetch_f: typeof fetch, concurrent?: number): typeof fetch;
export declare function handle_basic_auth(fetch_f: typeof fetch, config: AuthConfig): typeof fetch;
export declare function retry_fetch(fetch_f: typeof fetch, partial_config: Partial<RetryConfig>): typeof fetch;