Hi M8th, thanks for the code snippet. What we are doing is very similar, except that your example escapes the query string before digesting, while we unescape it. I tried escaping, but that also does not seem to solve the problem 

Were you able to solve this? We are also facing the question how to verify requests to callback_url/fetch_stock, it's always failing at the moment. We are extracting the relevant query parameters, sort them, and calculate the digest - no luck so far ...

Hi Skhaled, did you ever find out about the order of the payment_gateway_names field?We have a similar situation: an order maybe started as COD, and then switch to credit card for payment. We need a reliable way to detect that this order is not COD a...