import { PushAPI } from '@pushprotocol/restapi';
export declare const deriveChatId: (chatId: string, user: PushAPI | undefined) => Promise<string>;
export declare function deepCopy<T>(obj: T): T;
export declare const isMessageEncrypted: (message: string) => boolean;
export declare const getDomainIfExists: (chatId: string) => string | null;