HMAC SHA256 Signated request - Binance API

jhonidesb · June 12, 2020, 8:52pm

It seems that I am close to being able to generate a valid subscription for the Binance API.

I need to do this on Kodular:

var signature = CryptoJS.HmacSHA256 (dataQueryString, keys ['skey']). toString (CryptoJS.enc.Hex);

I’ve done the encryption with the HMAC SHA256 block, it seems that it is not easy to encode in hexadecimal and then convert to string

I didn’t find a way to do that on Kodular.
It seems that I need to convert this Base64 return as it gives this error:

Here a reference to the API documentation

github.com

binance-exchange/binance-official-api-docs/blob/master/rest-api.md#signed-endpoint-examples-for-post-apiv3order

<!-- START doctoc generated TOC please keep comment here to allow auto update -->
<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
**Table of Contents**  *generated with [DocToc](https://github.com/thlorenz/doctoc)*

  - [General API Information](#general-api-information)
  - [HTTP Return Codes](#http-return-codes)
  - [Error Codes](#error-codes)
  - [General Information on Endpoints](#general-information-on-endpoints)
- [LIMITS](#limits)
  - [General Info on Limits](#general-info-on-limits)
  - [IP Limits](#ip-limits)
  - [Order Rate Limits](#order-rate-limits)
- [Endpoint security type](#endpoint-security-type)
- [SIGNED (TRADE and USER_DATA) Endpoint security](#signed-trade-and-user_data-endpoint-security)
  - [Timing security](#timing-security)
  - [SIGNED Endpoint Examples for POST /api/v3/order](#signed-endpoint-examples-for-post-apiv3order)
    - [Example 1: As a request body](#example-1-as-a-request-body)
    - [Example 2: As a query string](#example-2-as-a-query-string)
    - [Example 3: Mixed query string and request body](#example-3-mixed-query-string-and-request-body)
- [Public API Endpoints](#public-api-endpoints)

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Here is the JavaScript example:

github.com

karthik947/Signed-REST-API/blob/master/demo.html

<html>
<script type="text/javascript" src="crypto-js.js"></script>
<script>
    
    var burl = 'https://api.binance.com';
    var endPoint = '/api/v3/account';
    var dataQueryString = 'recvWindow=20000&timestamp=' + Date.now();
    
    var keys = {
        'akey' : '',
        'skey' : ''
    }
    
    var signature = CryptoJS.HmacSHA256(dataQueryString ,keys['skey']).toString(CryptoJS.enc.Hex);
    
    var ourRequest = new XMLHttpRequest();
    
    var url = burl + endPoint + '?' + dataQueryString + '&signature=' + signature;
    
    ourRequest.open('GET', url, true);

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jhonidesb · June 13, 2020, 1:00am

Solved with script block EvaluatorJS!

Thanks @Andres_Cotes

jhonidesb · June 13, 2020, 7:27pm

Thanks @Taifun

system · July 13, 2020, 7:27pm

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