Error Verify Webhooks In Node.js - AWS Lambda

Technical Q&A
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1

Hi, I have the following issue:

App must verify the authenticity of the request from Shopify.> > Expected HTTP 401 (Unauthorized), but got HTTP 403 from https://******** Your app’s HTTPS webhook endpoints must validate the HMAC digest of each request, and return an HTTP 401 (Unauthorized) response when rejecting a request that has an invalid digest. Learn more about verifying a webhookthe code i am using is:

var CryptoJS = require("crypto-js");

exports.handler = async (event) => {

    const { webhook_verify_hash } = process.env;
//get the header with validation hash from webhook
    const hmac = event.headers ? 
        event.headers['X-Shopify-Hmac-Sha256'] || event.headers['x-shopify-hmac-sha256']
        : "";
        
    
    var statusCode = 400;
    
    let firma = CryptoJS.HmacSHA256(event.body, "shpss_*******");
    let calculatedHmac = firma.toString(CryptoJS.enc.hex);

    if (hmac == calculatedHmac) {
        console.log("se va a obtener el token");
        statusCode = 200
    } else {
         console.log("no obtiene el token");
         statusCode = 400
    }

    const response = {
        statusCode: statusCode
    };
    return response;
};
  • How can I test the mandatory webhooks and verify the response that I receive?