How to decode woocommerce webhook secret?

@darrion.kuhn 

To decode a WooCommerce webhook secret, you need to use the HMAC algorithm and your webhook secret key. Here's a step-by-step guide on how to decode a WooCommerce webhook secret:

Step 1: Obtain your webhook secret key You can find your webhook secret key in your WooCommerce dashboard. Go to WooCommerce -> Settings -> Advanced -> Webhooks and click on the specific webhook you want to decode. The secret key will be displayed there.

Step 2: Obtain the payload and the signature When WooCommerce sends a webhook, it includes two headers: X-WC-Webhook-Signature and X-WC-Webhook-Id. The X-WC-Webhook-Signature is the signature of the payload generated using the HMAC algorithm with your webhook secret key.

Step 3: Decode the secret To decode the secret, you need to use the HMAC algorithm with your webhook secret key. You can use a programming language like PHP, Python, or JavaScript to accomplish this. Here is an example using PHP:

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$secret_key = 'your_webhook_secret_key';
$payload = file_get_contents('php://input');
$signature = $_SERVER['HTTP_X_WC_WEBHOOK_SIGNATURE'];

$decoded_signature = base64_encode(hash_hmac('sha256', $payload, $secret_key, true));

if ($signature === $decoded_signature) {
    // The secret is valid, you can now process the webhook payload
    $data = json_decode($payload, true);
    // Process the webhook data here
} else {
    // The secret is invalid
    http_response_code(403);
    exit('Invalid signature');
}

Make sure to replace 'your_webhook_secret_key' with your actual webhook secret key. This code will decode the secret and verify if it matches the incoming signature. If the signature matches, it means that the webhook payload is valid and you can process the data accordingly. If it doesn't match, the signature is invalid, and you should respond with a 403 Forbidden status code.

Remember to always handle webhook data securely and verify the authenticity of the incoming requests to prevent unauthorized access to your system.