bencromwell
commented
9 years ago To do this you'd also need to change the Item object in omnipay-common, to have a category or a type field - both are perhaps common enough names to be added as optional parameters to the shared item. Either that or Item needs extending to support ad-hoc parameters that some gateways will use and others won't.
As far as I know there is no way to set the "L_PAYMENTREQUEST_0_ITEMCATEGORY0" flag to "Digital" in order for micropayment pricing to apply.
I might be missing something but I haven't found a way to use this.
Explained here: https://developer.paypal.com/docs/classic/express-checkout/ht_ec-basicDigGoodsPayment-curl-etc/