Verify HTTP requests sent to an Alexa skill are sent from Amazon.
This module is framework-agnostic.
If you're using expressjs, you should check out alexa-verifier-middleware which is a lot easier to integrate.
Part of the certication process for alexa skills hosted on a generic web service (i.e., not AWS Lambda) is that your skill must validate requests are actually coming from Amazon. This is enforced by checking:
This module provides a function to handle this validation.
const verifier =
cert_urlfull url of the certificate to verify (from HTTP request header named
signaturesignature of the request (from HTTP request header named
requestRawBodyfull body string from POST request
callbackcompletion function. has 1 argument which indicates error. falsey when verification passes