export interface loginSuccessResult {
    streamId?: string;
    userId?: string;
    roomId?: string;
}
export interface streamState {
    code: number;
    state: string;
    streamId: string;
}
export declare type errMsg = {
    code: number;
    msg: string;
};
export declare type changeConstraintsResult = {
    code: number;
    msg: string;
    stream?: MediaStream | null;
};