export declare enum SubscriptionType {
    ImMessage = "im.message"
}
export type SubscriptionItem = {
    type: (string & NonNullable<unknown>) | 'EVENT' | 'CALLBACK';
    topic: string;
};
export type SubscriptionData = {
    specVersion: string;
    type: string;
    headers: {
        appId: string;
        connectionId: string;
        IncomingType: string;
        messageId: string;
        time: string;
        topic: string;
        eventType?: string;
        eventBornTime?: string;
        eventId?: string;
        eventCorpId?: string;
        eventUnifiedAppId?: string;
    };
    data: string;
};
export declare const Subscriptions: {
    readonly AllEvent: SubscriptionItem;
    readonly ImMessage: SubscriptionItem;
};
export declare class SubscriptionManager {
}