This might work... I'll consider it further. We already have several extensions: loyalty, address validation, return assurance, guaranteed delivery, additional footer disclaimer, etc. I might be able to shove this idea into another extension then hav...

That won't work for my case... we only want to hide payment gateways when certain discount is used. For example, if we manage to get PayPal to fund a discount (I know, unlikely), we would want to disable all other payment methods so PayPal gets to pr...

Prior to the checkout extensibility changes, we were using the Shopify scripts to modify our payment gateways if a particular discount was applied. We were working with that provider to fund the discount so we wanted to ensure that gateway was used. ...