import { Unsubscribe } from 'nanoevents';
import { Participant } from 'src/participant';
import { Session } from 'src/session';
import { CleanupFn, ReadFn, UpdateFn } from 'src/state';
declare type MessageType = 'text';
export interface Message {
    type: MessageType;
    payload: string;
    meta?: string;
}
export interface Events {
    registered: (participantId: Participant['id']) => void;
    will_unregister: (participantId: Participant['id'], reason: 'kicked' | null) => void;
    audio_activity: (participantId: Participant['id']) => void;
    unregistered: (participantId: Participant['id']) => void;
    message_received: (participantId: Participant['id'], message: Message, recipients: Array<Participant['id']> | null) => void;
}
export interface ParticipantRegister {
    register: () => Promise<void>;
    unregister: () => Promise<void>;
    sendMessage: (message: Message, recipients?: Array<Participant['id']>) => Promise<void>;
    on<E extends keyof Events>(event: E, callback: Events[E]): Unsubscribe;
}
export declare const initParticipantRegister: ({ session, state, enableMessages, }: {
    session: Session;
    state: {
        read: ReadFn;
        update: UpdateFn;
        cleanup: CleanupFn;
    };
    enableMessages?: boolean | undefined;
}) => Promise<ParticipantRegister>;
export {};