import { Observable } from 'rxjs';
import { PresenceLocation } from '../types';
export declare type Incoming<T> = T & {
    userId: string;
    timestamp: string;
    sessionId: string;
};
export interface StateMessage {
    type: 'state';
    locations: PresenceLocation[];
}
export interface StateEvent extends StateMessage {
    userId: string;
    timestamp: string;
    sessionId: string;
}
export interface DisconnectMessage {
    type: 'disconnect';
}
export interface DisconnectEvent extends DisconnectMessage {
    userId: string;
    timestamp: string;
    sessionId: string;
}
export interface RollCallMessage {
    type: 'rollCall';
}
export interface RollCallEvent extends RollCallMessage {
    sessionId: string;
    userId: string;
}
export declare type TransportMessage = DisconnectMessage | StateMessage | RollCallMessage;
export declare type TransportEvent = StateEvent | RollCallEvent | DisconnectEvent;
export declare type Transport = [
    Observable<TransportEvent>,
    (message: TransportMessage) => Observable<void>
];
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