import GRPCClient from "./GRPCClient";
import IClientSidecar from "../../../interfaces/Client/IClientSidecar";
/**
 * gRPC control for sending signals to the Dapr runtime.
 *
 * Internal utility for lifecycle management operations like graceful shutdown.
 * Sends control signals directly to the Dapr sidecar process.
 *
 * @internal
 */
export default class GRPCClientSidecar implements IClientSidecar {
    /**
     * Reference to the underlying gRPC client.
     */
    client: GRPCClient;
    /**
     * Creates a gRPC sidecar control instance.
     *
     * @param client - The gRPC client instance
     *
     * @internal
     */
    constructor(client: GRPCClient);
    /**
     * Sends a graceful shutdown signal to the Dapr sidecar.
     *
     * @returns Promise resolving when shutdown signal is sent
     *
     * @throws Rejects if shutdown signal fails
     *
     * @internal
     */
    shutdown(): Promise<void>;
    /**
     * Checks if the Dapr sidecar is running and responsive.
     *
     * @param client - The gRPC client to use for the check
     * @returns Promise resolving to true if sidecar is running, false otherwise
     *
     * @internal
     */
    static isStarted(client: GRPCClient): Promise<boolean>;
}