Ethereum: How can I solve msg: ‘Signature for this request is not valid.’ from binance API?

Fix “The signature for this request is invalid” error in the Binance API

As you may have noticed, one of the most common errors when interacting with the Binance API is getting a “Signature for this request is invalid” error. 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 resolve it using the secret key and timestamp approach.

Why do you need to update your signature?

When you send a request to the Binance API, your client (usually a program) includes a unique identifier in the authentication header. This is called “Signature” or “Token”. The Binance API uses this signature to authenticate your requests and verify that they come from an authorized source.

How ​​to update the signature:

To resolve the “The signature for this request is invalid” error, you need to update the 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 a new signature: Use the hmac' library to generate a new signature using your private key and updated timestamp.

const hmac = require('crypto').createHmac('sha256', 'your_secret_key');
hmac.update(now.toString());
const signature = hmac.digest('hex');

• Update API Request: Replace the existing Signatureheader with a new one.

const bnb = require('binance-api');
// Set up Binance API credentials and secret key
const client = new bnb.Client({
apiVersion: 'v2',
accessToken: 'your_access_token',
});
// Get the current timestamp
const now = Math.floor(Date.now() / 1000);
// Compute the new signature
const hmac = require('crypto').createHmac('sha256', process.env.SECRET_KEY);
hmac.update(now.toString());
const signature = hmac.digest('hex');
// Update the 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 private as it can be used to authenticate API requests.

• Regularly update your private key and timestamp to ensure continuous authentication.

By following these steps, you will be able to resolve the "Signature for this request is invalid" error when interacting with the Binance API. Happy coding!