Ethereum: Bitcoind WalletNotify More than 6 Confirmations

As a frequent user of the popular cryptocurrency wallet and node software, you’ve likely encountered the need for notifications from your wallet whenever certain events occur. In this article, we’ll explore how to set up WalletNotify on Bitcoin Core (BTC) with PHP scripts to notify when more than 6 confirmations are received.

Understanding WalletNotify

Before diving into the solution, let’s quickly review what WalletNotify does:

• When you configure WalletNotify, it sends notifications to your configured email address or other destinations as soon as certain events occur.

• The notification is triggered by callback signals sent from Bitcoin Core when specific actions are performed on your wallet.

Setting up PHP Scripts for Notifications

To send notifications with more than 6 confirmations, we’ll use a custom PHP script that’s connected to the WalletNotify callback. Here’s an example of how you can set this up:

Step 1: Install Node.js and npm

Before proceeding, ensure your system has Node.js installed (version 14 or higher) along with npm (Node Package Manager). You can download both from [nodejs.org](

For Windows users:

npm install -g node

Step 2: Create a New PHP Script

Create a new file called notify.php in your preferred directory, and add the following code:

// Set the Bitcoin Core wallet connection details

$bcConn = new BitcoinCore('


// Define the callback function to trigger notifications

function onNotify($cb, $result) {

    // Log the notification data in the console

    echo "Notification triggered: " . json_encode($result) . "\n";


    // Send the notification via email or other destination (choose your method)

    $email = "[email protected]";  // Replace with your email address

    require_once 'vendor/autoload.php';

    use MailChimp\MailChimp;

    $mailchimp = new MailChimp("YOUR_API_KEY", "YOUR_SECRET_KEY");

    $mailchimp->send("your_notification_group", "subject", "Notification: " . json_encode($result));

}

Step 3: Configure the PHP Script to Send Notifications with More Than 6 Confirmations

To send notifications when more than 6 confirmations are received, modify your bcconf.json file (located in the Bitcoin Core directory) as follows:

"notify": {

    "callback": onNotify,

    "params": [

        {

            "callback": "confirm",

            "method": "post",

            "url": "

        },

        {

            "callback": "confirm",

            "method": "post",

            "url": "

        }

    ]

}

In this example, we’re configuring the notify option to use two callback functions (confirm) for notification delivery:

• The first confirmation callback is triggered when a new poll or form submission occurs.

• The second confirmation callback is triggered when a new transaction with more than 6 confirmations has been received.

Setting Up Bitcoin Core

To enable the notify option in your Bitcoin Core installation, follow these steps:

• Download and install the latest version of Bitcoin Core from [bitcoin.org](

• Start Bitcoin Core (bc --regen) to update the configuration files.

• Configure the bcconf.json file with the necessary settings (e.g., notification email addresses, API keys).

Testing Your Configuration

After configuring your wallet and running the PHP script with more than 6 confirmations, you should receive notifications via email or another destination.

Keep in mind that this configuration requires a working Bitcoin Core node and a Mailchimp account to send emails.

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