问题
I am integrating Express Checkout for a restaurant website, and would like to show "Tip" apart from taxes and subtotal on the Paypal review page order details. Like:
[Individual item details]
..
Item Total $20
Taxes $2
Tip $4
Total $26
I have referred api here : https://developer.paypal.com/docs/classic/api/merchant/SetExpressCheckout_API_Operation_NVP/
and here: https://developer.paypal.com/docs/classic/express-checkout/integration-guide/ECCustomizing/
and notice this parameter PAYMENTREQUEST_n_CUSTOM, but it only accepts "256 single-byte alphanumeric characters."
How can I achieve this? Thanks in advance
回答1:
Parameter PAYMENTREQUEST_n_CUSTOM is associated with a unique code which will be assigned to each product which you set using paypal express checkout API.
For item total use
PAYMENTREQUEST_n_ITEMAMT and PAYMENTREQUEST_n_AMT
For Taxes use
PAYMENTREQUEST_n_TAXAMT
For TIP use
PAYMENTREQUEST_n_HANDLINGAMT
回答2:
The PAYMENTREQUEST_n_CUSTOM parameter is something for developers to store custom data. It won't be shown anywhere.
About the tip, I'm afraid the only options is to add it as another an item of your order.
来源：https://stackoverflow.com/questions/33638590/paypal-custom-amount-type-on-express