PAYMENT_TYPE_NONE = 0
PAYMENT_TYPE_INSTANT = 1
PAYMENT_TYPE_AUTHORIZATION = 2

EXECUTE_TYPE_NONE = 0
EXECUTE_TYPE_CHAINED_INSTANT = 1
EXECUTE_TYPE_CHAINED_DELAYED = 2
EXECUTE_TYPE_PARALLEL = 3

TARGET_TYPE_NONE = 0
TARGET_TYPE_CAMPAIGN = 1
TARGET_TYPE_LIST = 2
TARGET_TYPE_DONATION = 3

# these two following parameters are probably extraneous since I think we will compute dynamically where to return each time.
COMPLETE_URL = '/paymentcomplete'
CANCEL_URL = '/paymentcancel'