Is there a hook where I can manipulate the querystring before it us used to populate fields.
I want to encode or encrypt or obviscate the querystring I send to gravity forms so people aren't tempted to fiddle with the some values - eg price / quantity. Yes the price is a protected field on the form which is great - but if passed via querystring the actual value be altered by those so inclined (which is not so great)
There seem to be plenty of obviscation methods and encryption ideas but I need to find a way to hook in and then decode the querystring at the receiving end. I have checked doco but can't find this one.