/**
 * Options for creating a CA-trusted fetch function
 */
export interface CaFetchOptions {
    /** PEM-encoded CA certificate (replaces system trust store) */
    ca: string;
}
/**
 * Creates a fetch function that trusts a custom CA certificate.
 *
 * Unlike `createMtlsFetch`, this does NOT present client certificates —
 * it only configures the TLS trust store so that connections to controllers
 * using self-signed or private CA certificates succeed.
 *
 * @param options - CA certificate material
 * @returns A fetch-compatible function that trusts the provided CA
 */
export declare function createCaFetch(options: CaFetchOptions): typeof fetch;