/// <reference types="node" />
export declare type HttpHeaders = Record<string, string>;
/**
 * RequestOptions is a set of properties that define
 * a request, or state change.
 *
 * Everything is usually optional.
 */
export declare type RequestOptions<T = any> = {
    /**
     * Should return a string or a Buffer.
     *
     * Will be used as the body in the HTTP request.
     * If not set, `body` will be used instead.
     */
    serializeBody?: () => string | Buffer | Blob;
    /**
     * If set, contains the body of the current state.
     *
     * If body is not a `string` or a `Buffer`, the body will
     * be json encoded.
     */
    data?: T;
    /**
     * List of headers that will be set in the request.
     *
     * If this is not set, we'll fall back to 'headers'
     */
    getContentHeaders?: () => HttpHeaders | Headers;
    /**
     * Full list of HTTP headers.
     */
    headers?: HttpHeaders | Headers;
};
export declare type GetRequestOptions = Omit<RequestOptions, 'serializeBody' | 'data'>;
export declare type HeadRequestOptions = GetRequestOptions;
export declare type PatchRequestOptions<T = any> = RequestOptions<T>;
export declare type PutRequestOptions<T = any> = RequestOptions<T>;
export declare type PostRequestOptions<T = any> = RequestOptions<T>;