Market Tickers

wss://api.bison.markets/ws/kalshi/event/{eventTicker}

const eventTicker = "KXBTC-100K";
const ws = new WebSocket(
  `wss://api.bison.markets/ws/kalshi/event/${eventTicker}`
);

ws.onopen = () => {
  console.log(`Connected to ${eventTicker} market data`);
  
  // Send heartbeat every 30 seconds
  setInterval(() => {
    if (ws.readyState === WebSocket.OPEN) {
      ws.send(JSON.stringify({ type: "ping" }));
    }
  }, 30000);
};

ws.onmessage = (event) => {
  const data = JSON.parse(event.data);
  
  // Ignore ping/pong messages
  if (data.type === "ping" || data.type === "pong") {
    return;
  }
  
  console.log("Market update:", data);
  updateMarketDisplay(data);
};

{
  "market_ticker": "KXBTC-100K-DEC31",
  "yes_bid_uusdc": "720000",
  "yes_ask_uusdc": "750000",
  "no_bid_uusdc": "250000",
  "no_ask_uusdc": "280000",
  "last_price_uusdc": "735000",
  "volume": 15000,
  "open_interest": 50000
}

const eventTicker = "KXBTC-100K";
const ws = new WebSocket(
  `wss://api.bison.markets/ws/kalshi/event/${eventTicker}`
);

// Store market data
const markets = new Map();

ws.onmessage = (event) => {
  const data = JSON.parse(event.data);
  
  if (data.type === "ping" || data.type === "pong") {
    return;
  }
  
  // Update market data
  markets.set(data.market_ticker, {
    yesBid: data.yes_bid_uusdc ? Number(data.yes_bid_uusdc) / 1_000_000 : null,
    yesAsk: data.yes_ask_uusdc ? Number(data.yes_ask_uusdc) / 1_000_000 : null,
    noBid: data.no_bid_uusdc ? Number(data.no_bid_uusdc) / 1_000_000 : null,
    noAsk: data.no_ask_uusdc ? Number(data.no_ask_uusdc) / 1_000_000 : null,
    lastPrice: data.last_price_uusdc ? Number(data.last_price_uusdc) / 1_000_000 : null,
    volume: data.volume,
    openInterest: data.open_interest,
  });
  
  // Update your UI
  renderMarketData(data.market_ticker, markets.get(data.market_ticker));
};

function renderMarketData(ticker, data) {
  console.log(`${ticker}:`);
  console.log(`  YES: ${data.yesBid} bid / ${data.yesAsk} ask`);
  console.log(`  NO:  ${data.noBid} bid / ${data.noAsk} ask`);
  console.log(`  Last: ${data.lastPrice}, Volume: ${data.volume}`);
}