export declare enum FetchResponseType {
    AUTO = "auto",
    JSON = "json",
    URL_ENCODED = "urlencoded",
    TEXT = "text",
    BINARY = "binary"
}
export declare enum FetchMethod {
    GET = "GET",
    POST = "POST",
    PUT = "PUT",
    DELETE = "DELETE",
    PATCH = "PATCH"
}
export declare function parseQueryString(qs: string): Record<string, string[]>;
export declare function mergeUrlQuery(url: string, query: Record<string, string | undefined>): string;
export declare function determineRequestBody(method: FetchMethod, body: any): [string | undefined, string | undefined];
export declare function readResponse(response: Response, type: FetchResponseType, contentType: string): Promise<any>;
export declare function headersToObject(headers: Headers | Record<string, string | string[]>): Record<string, string[]>;
export declare class HttpRequestFailed extends Error {
    name: string;
    details: {};
    status: number;
    constructor(status: number, method: string, url: string, details: any);
}
export declare class FetchError extends Error {
    name: string;
    status: number;
    constructor(status: number, message: string);
}