Ethereum: can I generate listenKey binance in app script

February 6, 2025 Dedon CRYPTOCURRENCY

This article provides instructions on how to create a listening key (also known as Binance Smart Chain) in an app script:

Creating a Listening Key in an App Script: A Step-by-Step Guide

New to creating data streams with the Binance Data Stream API and having trouble getting started? This article will walk you through how to create a listening key (also known as Binance Smart Chain) in an app script.

What is a listening key?

A listening key is a cryptographic key used to authenticate requests to the Binance Data Stream API. It is necessary to send and receive data on the Binance Smart Chain, a blockchain platform that runs on the Ethereum network.

Step 1: Create an App Script

First, you need to create an app script in your Google account. To do this, follow these steps:

Go to Gmail or Google Workspace

Click “Create a new project”

Select “App script” as the project type.

Step 2: Configuring the Binance Data Stream API

To connect to the Binance Data Stream API, you need to configure a new script that handles data streams. You can do this by clicking the “+” button in the left-hand menu and selecting “Create New Script”. Select “Data Stream” as the data stream type.

Step 3: Configure the Listener Key

The Binance Data Stream API requires a listener key to authenticate requests. To create a listener key, you need to create a new JSON Web Key (JWK) and add it to your application script.

Here is an example of how to do this:


// Install the JWK generator
var jwk = crypto.generateKey({
type: "RSA",
keysize: 2048,
});
// Export the JWK as a JSON string
var jwkJson = JSON.stringify(jwk);

Step 4: Add the Listener Key to Your Application

Once you have created the JWK, you can add it to your application script. To do this, follow these steps:

In the script editor, click “Tools” > “Manage Credentials”

Click “Create New Key”

Select “JSON Web Key (JWK)” as the type.

Select the file from step 3 that contains the JWK JSON string

Step 5: Specify the Listener Key for Your Application

To use the listener key, you must specify it in a URL parameter or environment variable. Here’s how:

In your application, add the following line at the top of the function:


var listenKey = 'YOUR_JWK_JSON_STRING';

Replace “YOUR_JWK_JSON_STRING” with the actual JSON string from step 3.

Putting it all together

Now that you have created a listen key (JWK) and added it to your application script, you are ready to use it to authenticate requests to the Binance Data Stream API. To do this, follow these steps:

Call the generateListenKey function in your application script:


function generateListenKey() {
var jwk = crypto.generateKey({
type: "RSA",
key size: 2048,
});
var listenKey = 'YOUR_JWK_JSON_STRING';
// Add the listen key to your application script
var script = new Function('jwk', 'listenKey', '(function(){return this;})(this.jwk, this.listenKey);');
var script = script(script);
}

Replace “YOUR_JWK_JSON_STRING” with the actual JSON string from step 3.

Conclusion

Creating a listening key in App Script can be a bit tricky, but following these steps will help you get started. Be sure to replace the placeholder values (e.g. YOUR_JWK_JSON_STRING) with your actual JWK data.

We hope this article was helpful! If you have any additional questions or need further assistance, please don’t hesitate to ask.

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