import type { HttpMiddleware, Method } from './http-client-types';
/**
 * Options for middleware to fetch CSRF tokens.
 */
export interface CsrfMiddlewareOptions {
    /**
     * Method used for the token fetching. Default is `head`.
     */
    method?: Method;
    /**
     * URL used for the token fetching. Default is the resource path without parameters.
     */
    url?: string;
    /**
     * Middlewares added to the token retrieval request.
     */
    middleware?: HttpMiddleware[];
}
/**
 * Middleware for fetching a CSRF token. This middleware is added to all request per default.
 * Use the `fetchCsrfToken` option to disable it.
 * @param options - Options like URL or method to configure the token fetching.
 * @returns The middleware for fetching CSRF tokens.
 */
export declare function csrf(options?: CsrfMiddlewareOptions): HttpMiddleware;
/**
 * @param headers - Request header information.
 * @returns CSRF related headers.
 * @internal
 */
export declare function buildCsrfFetchHeaders(headers: any): Record<string, any>;