import type { FetchAPI } from '../api';
export type OFREPProviderBaseOptions = {
    /**
     * Base URL for OFREP requests. Relative paths are supported.
     * For example, if your OFREP instance is available at
     * "https://host.com/path/{ofrep-api}" , you should set this to
     * "https://host.com/path" or "/path" (if your app and OFREP instance
     * share the same origin).
     */
    baseUrl: string;
    /**
     * Abort timeout in milliseconds.
     *
     * @default 10000
     */
    timeoutMs?: number;
    /**
     * Optional fetch implementation
     */
    fetchImplementation?: FetchAPI;
    /**
     * Optional Headers supplier function.
     * @returns HttpHeaders
     */
    headersFactory?: () => Promise<[string, string][]>;
    /**
     * Optional static headers.
     */
    headers?: [string, string][];
    /**
     * Optional static query params.
     */
    query?: URLSearchParams;
};
/**
 * Builds headers from static and factory, as well as default content type
 * @param options options
 * @returns built headers
 */
export declare function buildHeaders(options?: OFREPProviderBaseOptions, etag?: string | null): Promise<Headers>;