ygreq

I am trying to figure out how to make a small app that for now should track Binance exchange prices. I want to change from Max which tickers to track. But I have a problem with the node.js code.

Any idea how I should go about doing this in order to have the same output? I have 2 of Max.post and now I get an error on the second one. Do you know what I am doing wrong?

node.script: [ "Price of BTCUSDT: ", "6591.57000000" ]

node.script: [ "Price of BTCUSDT: ", null ]

It's missing the nmp package which can be found here 

https://www.npmjs.com/package/node-binance-api

. But the code is basic for someone with more knowledge than me :)

comment

message

button

bpatcher

n4m.monitor

node.script

var nodeBinanceApi = require("node-binance-api");

var tickerName; // Holds the ticker pair name (eg BTCUSDT)

const binance = require('node-binance-api')().options({

useServerTime: true, // If you get timestamp errors, synchronize to server time at startup

test: true // If you want to use sandbox mode where orders are simulated

// This will be printed directly to the Max console

Max.post(`loaded the ${path.basename(__filename)} script`);

// Use the 'addHandler' function to register a function for a particular message

Max.addHandler("tickerNameSelector", (tickerName) => {

binance.prices(tickerName, (error, ticker) => {

Max.post("Price of BTCUSDT: ", ticker.BTCUSDT);

Max.post("Price of BTCUSDT: ", ticker.tickerName);

I am trying to figure out how to make a small app that for now should track Binance exchange prices. I want to change from Max which tickers to track. But I have a problem with the node.js code.  

Any idea how I should go about doing this in order to have the same output?  I have 2 of Max.post and now I get an error on the second one. Do you know what I am doing wrong?
node.script: [ "Price of BTCUSDT: ", "6591.57000000" ]
node.script: [ "Price of BTCUSDT: ", null ]
 
It's missing the nmp package which can be found here https://www.npmjs.com/package/node-binance-api. But the code is basic for someone with more knowledge than me :)  

And the node.js code is this: 

const path = require('path');
const Max = require('max-api');
var nodeBinanceApi = require("node-binance-api");
var tickerName; // Holds the ticker pair name (eg BTCUSDT)

const binance = require('node-binance-api')().options({
 APIKEY: '<key>',
 APISECRET: '<secret>',
 useServerTime: true, // If you get timestamp errors, synchronize to server time at startup
 test: true // If you want to use sandbox mode where orders are simulated
});

// This will be printed directly to the Max console
Max.post(`loaded the ${path.basename(__filename)} script`);

// Use the 'addHandler' function to register a function for a particular message
Max.addHandler("tickerNameSelector", (tickerName) => {
 binance.prices(tickerName, (error, ticker) => {
 
 Max.post("Price of BTCUSDT: ", ticker.BTCUSDT);
 Max.post("Price of BTCUSDT: ", ticker.tickerName);

 
      });
});

Thank you so much!!
ygreq

Hi folks,
I am trying to figure out how to make a small app that for now should track Binance exchange prices. I want to change from Max whi

a-tiny-error-in-a-node-js-code-need-a-fix!

Altering your code like this ( 'tickerName' actually constains a string, so if you simply try and pass it to 'ticker' as a dot-style method, it doesn't treat it as the proper code, instead, i found you can evaluate strings as javascript code using the 'eval' function), treating "ticker." as a string and then concatenating it with the string contained in the variable tickerName, and then evaluating the whole thing seems to do what you're looking for:

And I appreciate the info regarding how your solution works.

It works!!! Thank you so much!! :D

And I appreciate the info regarding how your solution works.


Raja covered most here I guess but I'd advise to avoid 

 unless very very necessary. So yeah, just for reference you could use the following "

 object using a variable. For more context you can also head over to 

 for a more reference style explanation with examples: 

https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/Basics

And yeah, for completeness the full code again:

Raja covered most here I guess but I'd advise to avoid eval unless very very necessary.  So yeah, just for reference you could use the following "bracket notation property accessor":

in order to access a property of the ticker object using a variable. For more context you can also head over to MDN for a more reference style explanation with examples: https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/Basics

And yeah, for completeness the full code again:

ha! just last night i learned about 'key/value' pairs and how they relate to "

Happy to help and learn with you. Thanks for starting the thread, it's particularly interesting to me because i'm hoping to work with something similar(but with regular stocks... still learning). 

ha!  just last night i learned about 'key/value' pairs and how they relate to "bracket notation" so this makes sense now, thanks Florian!

@ygreq 
Happy to help and learn with you. Thanks for starting the thread, it's particularly interesting to me because i'm hoping to work with something similar(but with regular stocks... still learning). 
Cheers 🍻


Thank you, Florian. May I ask why not use eval?

since i gave you bad advice, i should probably take responsibility to provide you with the answer, midway down on this page gives a great answer:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval

(seems it's a huge security risk, and also slower to run... for a small test like we did here, hopefully ok, but if you get in the habit of using it, your code might become bloated and worst of all: become exposed to security risks)

my bad for suggesting it, beginner's luck (or lack thereof 😆) 😊

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval 

my bad for suggesting it, beginner's luck (or lack thereof 😆) 😊 

Thank you for info,  MC WRAPPIN R∆J∆!

https://www.ufa007.com/พนันบอลออนไลน์ : po

Thanks for the guiding.  

https://www.ufa007.com/พนันบอลออนไลน์  : po

A tiny error in a node.js code. Need a fix!