export interface PriceUpdate {
    tokenId: string;
    price: number;
    timestamp: number;
}
type PriceCallback = (update: PriceUpdate) => void;
export declare class PriceStream {
    private ws;
    private subscriptions;
    private reconnectAttempts;
    private maxReconnects;
    private reconnectTimer;
    private pingTimer;
    private lastPrices;
    connect(): void;
    subscribe(tokenId: string, callback: PriceCallback): void;
    unsubscribe(tokenId: string, callback?: PriceCallback): void;
    getLastPrice(tokenId: string): PriceUpdate | undefined;
    getSubscriptionCount(): number;
    isConnected(): boolean;
    disconnect(): void;
    private handleMessage;
    private sendSubscribe;
    private resubscribeAll;
    private scheduleReconnect;
    private startPing;
    private stopPing;
}
export {};
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