import { Message } from "gpt-turbo";
import { MessageCostUpdateListener, MessageSizeUpdateListener } from "../utils/types/messageStats.types.js";
export declare class MessageStats {
    private readonly message;
    readonly id: string;
    private _size;
    private _cost;
    private readonly sizeUpdateEvents;
    private readonly costUpdateEvents;
    constructor(message: Message);
    get size(): number;
    private set size(value);
    get cost(): number;
    private set cost(value);
    private update;
    onUpdateSize(listener: MessageSizeUpdateListener): () => void;
    onceUpdateSize(listener: MessageSizeUpdateListener): () => void;
    offUpdateSize(listener: MessageSizeUpdateListener): void;
    onUpdateCost(listener: MessageCostUpdateListener): () => void;
    onceUpdateCost(listener: MessageCostUpdateListener): () => void;
    offUpdateCost(listener: MessageCostUpdateListener): void;
}