import { type Transport } from '@connectrpc/connect';
export default class GRPCConnectionManager {
    private deferredTransport;
    private onDisconnect;
    private heartbeatIntervalMs;
    connecting: Promise<void> | undefined;
    constructor(deferredTransport: () => Transport, onDisconnect: () => void, heartbeatIntervalMs?: number);
    private get client();
    heartbeat(): void;
    start(): Promise<void>;
}