Fixing the «This request signature is not valid» error in Binance API
As you may have noticed, one of the most common errors when interacting with the Binance API is the error message «This request signature is not valid». This error is usually caused by an invalid or expired signature used to authenticate API requests.
In this article, we will look at the possible causes of this error and provide steps to fix it using the secret key and timestamp.
Why do I need to update my signature?
When sending a request to the Binance API, your client (usually an application) includes a unique identifier in the authentication header. This is called a «signature» or «token». The Binance API uses this signature to authenticate your requests and verify that they are coming from an authorized source.
How to update your signature:
To fix the «This request signature is not valid» error, you need to update your signature using the following approach:
- Get current timestamp: Get the current Unix timestamp in seconds since January 1, 1970.
const now = Math.floor(Date.now() / 1000);
- Calculate new signature: Use the hmac library to generate a new signature using your private key and the updated timestamp.
const hmac = request('crypto').createHmac('sha256', 'your_secret_key');
hmac.update(now.toString());
const signature = hmac.digest('hex');
- API Request: Replace the existing signature header with a new one.
Code Example:
Here is an example code snippet that demonstrates this process:
const bnb = require('binance-api');
// Set Binance API credentials and private key
const client = new bnb.Client({
apiVersion: 'v2',
accessToken: 'your_access_token',
});
// Get the current timestamp
const now = Math.floor(Date.now() / 1000);
// Calculate the new signature
const hmac = require('crypto').createHmac('sha256', process.env.SECRET_KEY);
hmac.update(now.toString());
const signature = hmac.digest('hex');
// Update API request
client.authHeader({
'Content-Type': 'application/json',
"Authorization": "Bearer ${client.getAccessToken()}",
"Signature": signature,
});
Recommendations:
To prevent this error in the future:
- Use a secure and up-to-date secret key.
- Keep your private key secret, as it can be used to authenticate API requests.
- Regularly update your secret key and timestamp to ensure continuous authentication.
By following these steps, you will be able to prevent the error «The signature for this request is not valid» when interacting with the Binance API. Happy coding!