/**
 * Represents a single price level in the order book
 * @example
 * { price: "0.01", size: "510000" }
 */
export type PriceLevel = {
    price: string;
    size: string;
};
/**
 * Represents a price_change event from Polymarket WebSocket
 * @example
 * {
 *   asset_id: "39327269875426915204597944387916069897800289788920336317845465327697809453999",
 *   changes: [
 *     { price: "0.044", side: "SELL", size: "611" }
 *   ],
 *   event_type: "price_change",
 *   hash: "a0b7cadf869fc288dbbf65704996fe818cc97d6a",
 *   market: "0x5412ae25e97078f814157de948459d59c6221b4c4c495fdd57b536543ad36729",
 *   timestamp: "1749371014925"
 * }
 */
export type PriceChangeEvent = {
    asset_id: string;
    changes: {
        price: string;
        side: string;
        size: string;
    }[];
    event_type: 'price_change';
    hash: string;
    market: string;
    timestamp: string;
};
/**
 * Represents a Polymarket book
 * @example
 * {
 *  bids: [
 *    { price: "0.01", size: "510000" },
 *    { price: "0.02", size: "3100" }
 *  ],
 *  asks: [
 *    { price: "0.99", size: "58.07" },
 *    { price: "0.97", size: "178.73" }
 * }
 */
export type Book = {
    bids: PriceLevel[];
    asks: PriceLevel[];
};
/**
 * Represents a book event from Polymarket WebSocket
 * @example
 * {
 *   market: "0xf83fb46dd70a4459fcc441a8511701c463374c5c3c250f585d74fda85ddfb7c9",
 *   asset_id: "101007741586870489619361069512452187353898396425142157315847015703471254508752",
 *   timestamp: "1740759191594",
 *   hash: "c0e51b1cfdbcb1b2aec58feaf7b01004019a89c6",
 *   bids: [
 *     { price: "0.01", size: "510000" },
 *     { price: "0.02", size: "3100" }
 *   ],
 *   asks: [
 *     { price: "0.99", size: "58.07" },
 *     { price: "0.97", size: "178.73" }
 *   ],
 *   event_type: "book"
 * }
 */
export type BookEvent = {
    market: string;
    asset_id: string;
    timestamp: string;
    hash: string;
    bids: PriceLevel[];
    asks: PriceLevel[];
    event_type: 'book';
};
/**
 * Represents a last trade price event from Polymarket WebSocket
 * @example
 * {
 *   asset_id: "101007741586870489619361069512452187353898396425142157315847015703471254508752",
 *   event_type: "last_trade_price",
 *   fee_rate_bps: "0",
 *   market: "0xf83fb46dd70a4459fcc441a8511701c463374c5c3c250f585d74fda85ddfb7c9",
 *   price: "0.12",
 *   side: "BUY",
 *   size: "8.333332",
 *   timestamp: "1740760245471"
 * }
 */
export type LastTradePriceEvent = {
    asset_id: string;
    event_type: 'last_trade_price';
    fee_rate_bps: string;
    market: string;
    price: string;
    side: 'BUY' | 'SELL';
    size: string;
    timestamp: string;
};
/**
 * Represents a tick size change event from Polymarket WebSocket
 * @example
 * {
 *   event_type: "tick_size_change",
 *   asset_id: "65818619657568813474341868652308942079804919287380422192892211131408793125422",
 *   market: "0xbd31dc8a20211944f6b70f31557f1001557b59905b7738480ca09bd4532f84af",
 *   old_tick_size: "0.01",
 *   new_tick_size: "0.001",
 *   timestamp: "100000000"
 * }
 */
export type TickSizeChangeEvent = {
    asset_id: string;
    event_type: 'tick_size_change';
    market: string;
    old_tick_size: string;
    new_tick_size: string;
    timestamp: string;
};
/**
 * Union type representing all possible event types from Polymarket WebSocket
 * @example BookEvent
 * {
 *   market: "0xf83fb46dd70a4459fcc441a8511701c463374c5c3c250f585d74fda85ddfb7c9",
 *   asset_id: "101007741586870489619361069512452187353898396425142157315847015703471254508752",
 *   timestamp: "1740759191594",
 *   hash: "c0e51b1cfdbcb1b2aec58feaf7b01004019a89c6",
 *   bids: [{ price: "0.01", size: "510000" }],
 *   asks: [{ price: "0.99", size: "58.07" }],
 *   event_type: "book"
 * }
 *
 * @example LastTradePriceEvent
 * {
 *   asset_id: "101007741586870489619361069512452187353898396425142157315847015703471254508752",
 *   event_type: "last_trade_price",
 *   fee_rate_bps: "0",
 *   market: "0xf83fb46dd70a4459fcc441a8511701c463374c5c3c250f585d74fda85ddfb7c9",
 *   price: "0.12",
 *   side: "BUY",
 *   size: "8.333332",
 *   timestamp: "1740760245471"
 * }
 *
 * @example PriceChangeEvent
 * {
 *   asset_id: "39327269875426915204597944387916069897800289788920336317845465327697809453999",
 *   changes: [
 *     { price: "0.044", side: "SELL", size: "611" }
 *   ],
 *   event_type: "price_change",
 *   hash: "a0b7cadf869fc288dbbf65704996fe818cc97d6a",
 *   market: "0x5412ae25e97078f814157de948459d59c6221b4c4c495fdd57b536543ad36729",
 *   timestamp: "1749371014925"
 * }
 *
 * @example TickSizeChangeEvent
 * {
 *   event_type: "tick_size_change",
 *   asset_id: "65818619657568813474341868652308942079804919287380422192892211131408793125422",
 *   market: "0xbd31dc8a20211944f6b70f31557f1001557b59905b7738480ca09bd4532f84af",
 *   old_tick_size: "0.01",
 *   new_tick_size: "0.001",
 *   timestamp: "100000000"
 * }
 */
export type PolymarketWSEvent = BookEvent | LastTradePriceEvent | PriceChangeEvent | TickSizeChangeEvent;
/**
 * Represents a price update event
 *
 * This is an event that is emitted to faciliate price update events. It is
 * not emitted by the Polymarket WebSocket directly.
 *
 * See https://docs.polymarket.com/polymarket-learn/trading/how-are-prices-calculated
 *
 * TLDR: The prices displayed on Polymarket are the midpoint of the bid-ask spread in the orderbook,
 * UNLESS that spread is over $0.10, in which case the **last traded price** is used.
 */
export interface PolymarketPriceUpdateEvent {
    event_type: 'price_update';
    asset_id: string;
    timestamp: string;
    triggeringEvent: LastTradePriceEvent | PriceChangeEvent;
    book: Book;
    price: string;
    midpoint: string;
    spread: string;
}
/**
 * Represents the handlers for the Polymarket WebSocket
 */
export type WebSocketHandlers = {
    onBook?: (events: BookEvent[]) => Promise<void>;
    onLastTradePrice?: (events: LastTradePriceEvent[]) => Promise<void>;
    onTickSizeChange?: (events: TickSizeChangeEvent[]) => Promise<void>;
    onPriceChange?: (events: PriceChangeEvent[]) => Promise<void>;
    onPolymarketPriceUpdate?: (events: PolymarketPriceUpdateEvent[]) => Promise<void>;
    onError?: (error: Error) => Promise<void>;
    onWSClose?: (groupId: string, code: number, reason: string) => Promise<void>;
    onWSOpen?: (groupId: string, assetIds: string[]) => Promise<void>;
};
/**
 * Type guard to check if an event is a BookEvent
 * @example
 * if (isBookEvent(event)) {
 *   // event is now typed as BookEvent
 *   console.log(event.bids);
 * }
 */
export declare function isBookEvent(event: PolymarketWSEvent): event is BookEvent;
/**
 * Type guard to check if an event is a LastTradePriceEvent
 * @example
 * if (isLastTradePriceEvent(event)) {
 *   // event is now typed as LastTradePriceEvent
 *   console.log(event.side);
 * }
 */
export declare function isLastTradePriceEvent(event: PolymarketWSEvent): event is LastTradePriceEvent;
/**
 * Type guard to check if an event is a PriceChangeEvent
 * @example
 * if (isPriceChangeEvent(event)) {
 *   // event is now typed as PriceChangeEvent
 *   console.log(event.changes);
 * }
 */
export declare function isPriceChangeEvent(event: PolymarketWSEvent): event is PriceChangeEvent;
/**
 * Type guard to check if an event is a TickSizeChangeEvent
 * @example
 * if (isTickSizeChangeEvent(event)) {
 *   // event is now typed as TickSizeChangeEvent
 *   console.log(event.old_tick_size);
 * }
 */
export declare function isTickSizeChangeEvent(event: PolymarketWSEvent): event is TickSizeChangeEvent;