import { type ChildProcess } from 'node:child_process';
interface VncSession {
    userId: string;
    displayNum: string;
    x11vncProcess: ChildProcess;
    websockifyProcess: ChildProcess;
    token: string;
    vncPort: number;
    wsPort: number;
    startedAt: number;
    timeoutHandle: NodeJS.Timeout;
}
export declare function getVncSession(userId: string): VncSession | undefined;
export declare function startVnc(userId: string, displayNum: string): Promise<{
    token: string;
    vncUrl: string;
    wsPort: number;
}>;
export declare function stopVnc(userId: string): Promise<boolean>;
export declare function stopAllVnc(): void;
export {};
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