adrianmacneil/omnipay — pull request #52 by cfreear (2013-04-25 12:48:30+00:00)
Title: PayPal partial refund support

If no redundType is specified it will default to Full for backwards compatibility. According to PayPal [documentation](https://cms.paypal.com/uk/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_api_nvp_r_RefundTransaction) AMT (and CURRENCYCODE) should only be provided if REFUNDTYPE isn't Full.