import { DefaultMessageType } from './getTopic';
import { SubscriberProps } from './Subscriber';
export type UseSubscriptionProps<TMessage = DefaultMessageType> = SubscriberProps<TMessage> & {
    /**
     * Function to determine if messages are the same to cut down on renders. Do not set if you want every message.
     * @param o1 The existing message
     * @param o2 The new incoming message
     * @return Standard comparison result, `true` or `0` if equal, `false` or non-zero otherwise.
     */
    compareFunc?: (o1: TMessage | null | undefined, o2: TMessage | null | undefined) => boolean | number;
};
export declare function useSubscription<TMessage = DefaultMessageType>(props: UseSubscriptionProps<TMessage>): TMessage | null;