import { PriceFeedResponse } from "../types";
/**
 * Callback function type for price updates
 */
export type PriceUpdateCallback = (priceData: PriceFeedResponse) => void;
/**
 * WebSocket client for real-time price feeds from Pyth Network
 */
export declare class FeedClient {
    private url;
    private ws?;
    private callbacks;
    private onError?;
    private onClose?;
    private pairFeedMap;
    private reconnectAttempts;
    private maxReconnectAttempts;
    private reconnectDelay;
    constructor(url?: string, onError?: (error: Error) => void, onClose?: () => void);
    /**
     * Register a callback for a specific price feed
     */
    registerPriceFeedCallback(feedId: string, callback: PriceUpdateCallback): void;
    /**
     * Unregister a callback for a specific price feed
     */
    unregisterPriceFeedCallback(feedId: string, callback: PriceUpdateCallback): void;
    /**
     * Load pair to feed ID mappings
     */
    loadPairFeeds(pairFeeds: Map<string, string>): void;
    /**
     * Get feed ID for a trading pair
     */
    getFeedIdForPair(pairName: string): string | undefined;
    /**
     * Connect to WebSocket and listen for price updates
     */
    listenForPriceUpdates(): Promise<void>;
    /**
     * Subscribe to specific price feeds
     */
    private subscribeToPriceFeeds;
    /**
     * Unsubscribe from specific price feeds
     */
    private unsubscribeFromPriceFeeds;
    /**
     * Handle incoming price update
     */
    private handlePriceUpdate;
    /**
     * Attempt to reconnect to WebSocket
     */
    private attemptReconnect;
    /**
     * Get latest prices via HTTP
     */
    getLatestPriceUpdates(feedIds: string[]): Promise<any>;
    /**
     * Close the WebSocket connection
     */
    close(): void;
    /**
     * Check if WebSocket is connected
     */
    isConnected(): boolean;
}