Crypto Prices

{
  "action": "subscribe",
  "platform": "chainlink",
  "version": 1,
  "type": "crypto",
  "filters": { "feeds": ["BTC/USD", "ETH/USD"] }
}

{
  "type": "event",
  "subscription_id": "sub_xxx",
  "data": {
    "event_type": "price_feed",
    "feed": "BTC/USD",
    "price": 66225.49,
    "bid": 66221.69,
    "ask": 66229.46,
    "observed_at": 1774672588,
    "timestamp": 1774672588
  }
}

ws.onmessage = (event) => {
  const msg = JSON.parse(event.data);

  if (msg.type === 'event' && msg.data.event_type === 'price_feed') {
    const { feed, price, bid, ask, observed_at } = msg.data;
    const spread = ask - bid;
    console.log(`[${feed}] $${price.toFixed(2)}  bid=${bid.toFixed(2)} ask=${ask.toFixed(2)} spread=${spread.toFixed(4)}`);
  }
};

ws.send(JSON.stringify({
  action: 'subscribe',
  platform: 'chainlink',
  version: 1,
  type: 'crypto',
  filters: { feeds: ['BTC/USD', 'ETH/USD', 'SOL/USD'] }
}));