Option to have customers pay payment processor fees

[bobintetley]

Raised by a customer who wanted to have the customer pay the processor fee.

I'm not 100% how this would work. We do have the fee information but only after the payment has been taken, and it updates the fee on the record.

I think the simplest way is to have an option to configure the fee percentage for each processor on the payment processor options tab, with an option to automatically add processor fees to payments.

This, as the name implies would take the percentage of any payment when sending it to the payment processor and inflate the gross amount by the estimated cost of the fee. This will still not quite cover the fee because the extra amount added will increase the fee very slightly.

Might need more investigation/thinking about.