user points

Hi there!
I have configuring users to earn points for example 1point each 1euro.
When someone make 200 euro total payments, he earn 200points and he will have 10,00 euro discount.

So my question is in next payment how user will redeem the discount 10,00 using points??
For example if the total price is 20,00euro and user select payment method with paypal, then how total price change by using points to pay 10,00 euros??

thanks in advance

Ηι again

i found the solution, so dont need to reply

thanks