export type EventBusEventPayload = Record<string, unknown>;
export type EventBusEvent = {
    topic?: string;
    payload?: EventBusEventPayload;
};
export type EventBusEventHandler = (event: EventBusEvent) => void;
export type EventBusSubscription = {
    unsubscribe: () => void;
};
export declare abstract class EventBus {
    abstract emit(channelName: string, topic?: string, payload?: EventBusEventPayload): void;
    abstract subscribe(channelName: string, topic?: string, handler?: EventBusEventHandler): EventBusSubscription;
    abstract removeChannel(channelName: string): void;
}