Resolving “The signature for this request is invalid” error in Binance API
As you may have noticed, one of the most common errors when interacting with the Binance API is seeing the error message “The signature for this request is invalid.” This error usually occurs due to 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 resolve it using a secret key and timestamp.
Why does the signature need to be updated?
When you make a request to the Binance API, your client (usually a program) includes a unique identifier in the authentication header. This is called a “Signature” or “Token.” The Binance API uses this signature to authenticate requests and verify that they come from an authorized source.
How to update your signature:
To resolve the error „The signature for this request is invalid”, you should 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 secret key and the current timestamp.
const hmac = require('crypto').createHmac('sha256', 'your_secret_key');
hmac.update(now.toString());
const signature = hmac.digest('hex');
- Updating API request
: Replace the existing „Signature” header with the new one.
Code example:
Here is a sample code snippet illustrating this process:
const bnb = require('binance-api');
// Set up your API credentials and Binance secret
const client = new bnb.Client({
API version: "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,
});
Best Practices:
To prevent this error from occurring in the future:
- Use a secure and up-to-date secret key.
- Keep the secret key secret, as it can be used to authenticate API requests.
- Update the secret key and timestamp regularly to ensure authentication continuity.
By following these steps, you should be able to resolve the „The signature for this request is invalid” error when interacting with the Binance API. Happy coding!