Websockets depth cache not working for a lot of symbols

[MauriPastorini]

Title

• bug: When I try a small amount of symbols all works fine, but when I tried to subscribe to all symbols, I received this error:

code

binance.websockets.depthCache(
      symbols,
      (symbol, depth) => {
        console.log("Depth cache: ", depth);
        let bids = binance.sortBids(depth.bids);
        let asks = binance.sortAsks(depth.asks);

Symbols is the array with all the symbols ['ETHBTC',.....] Result

node-binance-api\node-binance-api.js:1771
                            if (err) throw err;
                                     ^

Error: ETIMEDOUT
    at Timeout._onTimeout (G:\....\node_modules\request\request.js:849:19)
    at ontimeout (timers.js:475:11)
    at tryOnTimeout (timers.js:310:5)
    at Timer.listOnTimeout (timers.js:270:5)

thank you

[jaggedsoft]

You are likely doing calls other than depthCache to cause this. The ETIMEDOUT error typically triggers when you send too many requests to Binance in a short amount of time and get temporarily banned by their loadbalancer for a short time. If you are using the depth function then it downloads a complete snapshot of the order book, so if that is the case you will need to delay your calls to depth by 350ms each.

[MauriPastorini]

Hi jaggedsoft, thank you for your response. But I am not doing too many request, I am running only the script below and throws me that error. Also, I tried opening websockets manually for all the symbols as I tried with this library, and I could connect successfully, but again, not with the library

Here is the code:

const binance = require("node-binance-api")();

console.log("Starting");
binance.exchangeInfo(function(error, data) {
  if (error) {
    console.error("Error getting exchange information of Binance: ", error);
    return;
  }
  let symbols = [];
  for (let obj of data.symbols) {
    symbols.push(obj.symbol);
  }
  binance.websockets.depthCache(
    symbols,
    (symbol, depth) => {
      console.log("Depth cache: ", depth);
    },
    5
  );
});

Error:

node-binance-api\node-binance-api.js:1771
                            if (err) throw err;
                                     ^

Error: ETIMEDOUT
    at Timeout._onTimeout (G:\....\node_modules\request\request.js:849:19)
    at ontimeout (timers.js:475:11)
    at tryOnTimeout (timers.js:310:5)
    at Timer.listOnTimeout (timers.js:270:5)

[jaggedsoft]

Odd, that code is working fine for myself and countless others. I couldn't even begin to think why this would happen. Check out this code which connects to the websocket endpoints without using this library: https://github.com/jaggedsoft/node-binance-api/blob/master/examples/experiments.js

[MauriPastorini]

Yes this is very odd. I tried that example and it is working great and opening the websockets manually works great too.

[ghost]

Same thing happens to me with around 200 symbols. Works fine with 10-20 @jaggedsoft