Ethereum: How to Watch All Addresses Under HD Wallet

As an Ethereum developer, you’re likely interested in monitoring the activity on your HD wallet, particularly when it comes to receiving Bitcoin (BTC). While Bitcoind’s wallet notification service only supports traditional HD wallets like Electrum or MetaMask, there are alternative solutions that allow you to receive notifications for addresses under HD wallets. In this article, we’ll explore how to achieve this.

Why do I need to watch all addresses under HD wallet?

HD wallets store your Ethereum private keys securely on your device using Hardware Security Modules (HSMs). These HSMs are designed to protect sensitive data and can only access the key that corresponds to a specific address. When an address is used to receive BTC, it doesn’t automatically notify your HD wallet or any other service about its activity.

How ​​to watch all addresses under HD wallet?

While Bitcoind’s wallet notification service (walletnotify) supports traditional HD wallets, there are alternative solutions available:

• Etherscan: Etherscan is a popular platform for Ethereum developers to monitor their accounts and receive notifications when certain addresses are used to receive BTC.

• HD Wallet Notification Service: There is an unofficial HD Wallet Notification Service called “Wallet Notify” (also known as “walletnotify”) that supports HD wallets like Electrum, MetaMask, and more. However, it’s essential to note that this service only works for traditional HD wallets and not for native HD wallets.

• Ethereum Smart Contracts: You can also use Ethereum smart contracts to create a custom notification system for your HD wallet.

Implementing HD Wallet Notification Service

To implement the HD Wallet Notification Service using Etherscan, you’ll need to:

• Install Etherscan on your device or server.

• Create an account and obtain an API key from Etherscan.

• Use the Etherscan API to retrieve information about your Ethereum accounts, including addresses under HD wallets.

Here’s a simple example of how you can use Etherscan’s API to receive notifications when certain addresses are used to receive BTC:

const etherscanApi = require('etherscan-api');


// Replace with your Etherscan API key and wallet address

const apiKey = 'YOUR_API_KEY';

const walletAddress = 'YOUR_wallet_ADDRESS';


// Retrieve information about Ethereum accounts, including addresses under HD wallets

etherscanApi.getAccounts(walletAddress)

  .then(accounts => {

    accounts.forEach(account => {

      if (account.address.includes('HD Wallet')) {

        console.log(Received notification for address ${account.address});

      }

    });

  })

  .catch(err => {

    console.error(err);

  });

Conclusion

While traditional HD wallets like Electrum and MetaMask only support Bitcoind’s wallet notification service, there are alternative solutions available that allow you to receive notifications when addresses under HD wallets are used to receive BTC. By implementing the HD Wallet Notification Service using Etherscan or creating your own custom solution, you can stay on top of your Ethereum accounts and receive timely notifications about activity.

Additional Resources

• Etherscan’s official documentation: <

• HD Wallet Notification Service ( unofficial ): <

• Ethereum Smart Contracts: <

I hope this article helps you navigate the world of Ethereum and HD wallet notifications!

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