Web sockets and bitfinex

Question

I want to use websockets to get the exchange rate from the Bitfex exchange. But in the browser I get an error

<html> <div id="btc"></div> <script> var ws = new WebSocket("wss://api2.bitfinex.com:3000/ws"); ws.onopen = function(){ ws.send(JSON.stringify({"event":"subscribe", "channel":"ticker", "pair":"BTCUSD"})) }; ws.onmessage = function(msg){ var response = JSON.parse(msg.data); var hb = response[1]; if(hb != "hb"){ document.getElementById("btc").innerHTML = "$" + response[7]; } }; </script> </html>

Mistake

 failed: Error in connection establishment: net::ERR_NAME_NOT_RESOLVED

Table output using php

 $req = json_decode(file_get_contents("https://api.bitfinex.com/v1/book/BTCUSD"), true); echo "<table><tr><td>Bids</td><td>Asks</td></tr>"; $bids = $req["bids"]; echo "<tr><td valign='top'>"; foreach($bids as $details){ echo "$".$details["price"]." - ".$details["amount"]; echo "<br>"; } echo "</td><td valign='top'>"; $asks = $req["asks"]; foreach($asks as $askDetails){ echo "$".$askDetails["price"]." - ".$askDetails["amount"]; echo "<br>"; } echo "</td></tr></table>";

Orderbuk

  <script> var ws = new WebSocket("wss://api-pub.bitfinex.com/ws/2"); ws.onopen = function(){ ws.send(JSON.stringify({ event: 'conf', flags: 131072 })) let msg = JSON.stringify({ event: 'subscribe', channel: 'book', pair: 'tBTCUSD', prec: 'P0' }) ws.send(msg) ws.onmessage = function(msg){ var response = JSON.parse(msg.data); console.log(response); } } </script>

Alexey Kapustsin Alexey Kapustsin 183 one eight · Accepted Answer · 2019-04-25T07:38:04

Judging by the answers hb is the state when you do not need to update the value?

Perhaps you have a problem with the <div id="btc"></div> element

Alexey Kapustsin

183 one eight

and how can I display information in this case? - Lamer
You have not quite correctly recorded access to the 7th element. Here is the correct one. document.getElementById("btc").innerHTML = "$" + response[1][7]; - Alexey Kapustsin
Thank you, there is another question. On php written script that displays the order of the beech, also with bitfex, how can this be implemented using webocards? Completed the answer with your php code - Lamer
docs.bitfinex.com/v2/reference#ws-public-order-books You just need to change the parameters in ws.send a bit and then correctly parse the answer into a table, like you did in php - Alexey Kapustsin
And how can I get the current btc rate? paired with the dollar - Lamer

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Alexey Kapustsin Alexey Kapustsin 183 one eight · Answer 2 · 2019-04-25T07:14:00

https://docs.bitfinex.com/v2/docs/ws-general

The Docs API specifies:

 // For public channels: wss://api-pub.bitfinex.com/ws/2 // For authenticated channels: wss://api.bitfinex.com/ws/2

Use the first URL for your requests.

Changed the url, now $ undefined is displayed on the page and all

Web sockets and bitfinex

2 answers 2

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