import type { FetchFn } from "./types.js";
/**
 * Configuration for the bearer-token fetch wrapper.
 */
export interface BearerFetchOptions {
    /**
     * When `true` (default), the returned `FetchFn` is also wrapped with
     * `retryFetch` for automatic retry on HTTP 429.
     * Pass `false` for raw bearer injection only.
     * @default true
     */
    retry?: boolean;
}
/**
 * Create a `FetchFn` that injects a Bearer Authorization header into every request.
 *
 * When `accessToken` is `undefined` or empty, requests are sent without an
 * Authorization header (useful for public/anonymous access).
 *
 * By default the returned function is also wrapped with `retryFetch` (retry
 * on 429 with linear backoff). Pass `{ retry: false }` to opt out.
 *
 * Usage:
 * ```ts
 * const fetchFn = bearerFetch(session.accessToken);
 * const client = new FhirReadClient(baseUrl, "Patient", fetchFn);
 * ```
 */
export declare function bearerFetch(accessToken?: string, options?: BearerFetchOptions): FetchFn;
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