Change Check-out workflow to check and deduct acct

I want to change the HikaShop check-out process to check a members reward account, only allow purchase if they have enough in the account and to deduct the account with the purchase amount. Can HikaShop be customized to do this?

Wouldn't the integration we have with AlphaUserPoints handle that ?
www.hikashop.com/en/support/documentatio...userpoints-form.html