hi i am trying to get the real time price of bitcoin using the coinbase api in the documentation it says it discourages polling of the price data so i was wandering if it is possible to get it from their web socket feed if so what channel and what value would it be. i have tried the ticker channel but it is not what i am looking for
this code works but i warns not to poll
function get_price() {
const callback = (error, response, data) => {
if(error){
console.log(error);
}else{
xPrice = data.price;
}
};
authedClient.getProductTicker(a2, callback);
}
here is the code to subscribe to the web socket feed
const websocket = new CoinbasePro.WebsocketClient(
["BTC-EUR"],
"wss://ws-feed-public.sandbox.pro.coinbase.com",
null,
{
channels: ['ticker']
}
);
It is working, but you get both type=’heartbeat’ and type=’ticker’ messages, and they are asynchronuosly sent to your callback function. So you must wait for the callback to receive a ticker message before trying to run the code that processes the ticker.
const websocket = new CoinbasePro.WebsocketClient(
["BTC-EUR"],
"wss://ws-feed.pro.coinbase.com",
null, // <-- you need to put your API key in
{
channels: ['ticker']
}
);
websocket.on('message',data=>data.type==='ticker'&&xPrice=data.price&&console.log(data.price, data))
// (only want to see ticker messages)
// you will receive heartbeat (keep-alive) and ticker messages
// asynchronous callback will send data when it is available
// you must wait for data to be available and act on it