import { MessageInterface, MessageListener } from './MessageInterface';
/**
 * an equivalent of /dev/null for messageinterface. Does nothing.
 */
export declare class NullMessageInterface implements MessageInterface {
    send(userId: string, payload: string): Promise<void>;
    addMessageListener(listener: MessageListener): void;
    addContact(userId: string, keyInformation: any): Promise<string | void>;
    getKeyInformation(): Promise<any>;
    getOwnUserId(): Promise<string>;
}
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