export declare type MessageType = 'text' | 'file' | 'event';
export declare type EventType = 'join' | 'leave' | 'heartbeat' | 'typing_start' | 'typing_end' | 'room_closed' | 'assigned' | null;
export interface IMessage {
    room_id?: string;
    sort_id?: number;
    content?: string;
    sender?: string;
    identity_id?: string;
    token_identity_id?: string;
    is_sent?: boolean;
    created_at?: Date;
    event_type?: EventType;
    type?: MessageType;
    access?: string;
}
export declare type Message = Required<IMessage>;
export interface HeartbeatMessage extends IMessage {
    created_at: Date;
}