import { ClientProxy } from "@nestjs/microservices";
export declare class JsonRpcClient extends ClientProxy {
    private readonly url;
    private readonly metadata?;
    constructor(url: string, metadata?: {
        [key: string]: string;
    } | undefined);
    private counter;
    private jsonrpc;
    connect(): Promise<any>;
    close(): Promise<void>;
    /**
     * Method is unsupported for JSONRPC
     */
    protected publish(packet: any, callback: (packet: any) => any): any;
    /**
     * Method is unsupported for JSONRPC
     */
    protected dispatchEvent(packet: any): Promise<any>;
    getService<SvcInterface>(namespace: string): ServiceClient<SvcInterface>;
}
export type ServiceClient<Service> = {
    [MethodName in keyof Service]: Service[MethodName] extends (params: infer Params, ...injections: any) => infer ReturnType ? (params: Params) => ReturnType extends Promise<any> ? ReturnType : Promise<ReturnType> : never;
};