title: Binance API Hmac Signature
body: <p>please help I don't know what is wrong with my code.
  Endpoints that doesn't need signature work fine, so I guess is a problem with how I am getting the signature. I am getting this error:</p>
  
  <pre><code>data: { code: -2014, msg: 'API-key format invalid.' } } }
  </code></pre>
  
  <p>API Doc: <a href="https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md" rel="noreferrer">https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md</a></p>
  
  <blockquote>
    <p>SIGNED endpoints require an additional parameter, signature, to be
    sent in the query string or request body. Endpoints use HMAC SHA256
    signatures. The HMAC SHA256 signature is a keyed HMAC SHA256
    operation. Use your secretKey as the key and totalParams as the value
    for the HMAC operation. The signature is not case sensitive.
    totalParams is defined as the query string concatenated with the
    request body.</p>
  </blockquote>
  
  <p>My code:</p>
  
  <pre><code>const axios = require('axios');
  const crypto = require('crypto');
  const qs = require('qs');
  
  const binanceConfig = {
    API_KEY: 'XXXXXXX',
    API_SECRET: 'XXXXXX',
    HOST_URL: 'https://api.binance.com',
  };
  
  const buildSign = (data, config) =&gt; {
    return crypto.createHmac('sha256', config.API_SECRET).update(data).digest('hex');
  };
  
  const privateRequest = async (data, endPoint, type) =&gt; {
    const dataQueryString = qs.stringify(data);
    const signature = buildSign(dataQueryString, binanceConfig);
    const requestConfig = {
      method: type,
      url: binanceConfig.HOST_URL + endPoint + '?' + dataQueryString + '&amp;signature=' + signature,
      headers: {
        'Authorization': `X-MBX-APIKEY: ${binanceConfig.API_KEY}`,
      },
    };
  
    try {
      console.log('URL: ', requestConfig.url);
      const response = await axios(requestConfig);
      console.log(response);
      return response;
    }
    catch (err) {
      console.log(err);
      return err;
    }
  };
  
  const data = {
    symbol: 'ARKBTC',
    recvWindow: 20000,
    timestamp: Date.now(),
  };
  
  privateRequest(data, '/api/v3/openOrders', 'GET');
  </code></pre>