import { ChatTurn } from "types";
/**
 * A hook that exposes a data fetcher, message history, loading state, and error state.
 */
export declare const useChat: (customerId: string, corpusIds: string[], apiKey: string, summarizer: string, promptText: string) => {
    sendMessage: ({ query, isRetry }: {
        query: string;
        isRetry?: boolean | undefined;
    }) => Promise<never[] | undefined>;
    startNewConversation: () => void;
    messageHistory: ChatTurn[];
    isLoading: boolean;
    hasError: boolean;
};