Slack validation in Python3

validate_slack_request_source.py

def validate_request_source(request):
    """Validate that the incoming request is from our own slack instance in Python3
       Returns True if the request is valid, False otherwise"""
    try:
        if 'X-Slack-Request-Timestamp' in request.headers and 'X-Slack-Signature' in request.headers:
            timestamp = request.headers['X-Slack-Request-Timestamp']
            expected_signature = request.headers['X-Slack-Signature']
            # Reject replay attacks
            if (int(timestamp) + (60 * 5)) < int(time()):
                return False
            data = request.get_data().decode("utf-8")
            basestring = f"v0:{timestamp}:{data}".encode('utf-8')
            slack_signing_secret = bytes(os.environ['slack_signing_secret'], 'utf-8')
            signature = 'v0=' + new(slack_signing_secret, basestring, sha256).hexdigest()
            # Compare signatures
            if compare_digest(signature, expected_signature):
                return True
        return False
    except Exception as e:
        print('Failed to validate request source: {}.'.format(e))
        return False