/**
 * JSON-RPC HTTP service.
 */
export declare class JsonRpcHttpTransport {
    private readonly url;
    /**
     * JSON-RPC HTTP service constructor.
     */
    constructor(url: string);
    /**
     * Send a JSON-RPC request.
     * @see {T}
     */
    request(method: string, params: unknown | null): Promise<unknown>;
}