Comment by tzs

I don't think most merchants have the option to be that granular. I believe that most payment processors only provide a simplified view of interchange rates (and other fees) to all but very large merchants.

For example Braintree is 2.59% + $0.49/transaction, plus 1% if non-USD and 1% if the card was issued outside the US.

They used to split transactions into two tiers, based on how much the actual interchange and other fees were, and you monthly bill as a merchant would show charges for each tier. Within each tier the charge to the merchant was a fixed percentage and a fixed transaction fee. There was no good way for the merchant to know ahead of time which tier a given charge would fall under, although they could guess that a high rewards card was more likely to fall into the higher fee tier.