export type HeaderFactory = () => Record<string, string | undefined>;
export declare function withHeaders(fetchImpl: typeof fetch, headerFactory: HeaderFactory): (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
export declare function httpGet(fetcher: typeof fetch, url: string): Promise<any>;
export declare function httpPost(fetcher: typeof fetch, url: string, body: unknown, opts?: {
    idempotencyKey?: string;
}): Promise<any>;