Hi,
Thanks fort he clarification.
So no, HikaSerial won't be the right solution for such requirement.
The "hikashoppayment | userpoints" plugin when not in "virtual coupon" mode is a classical payment method which create HikaShop coupon codes ; I am not fan of this mode but what the plugin perform is near of what you want to achieve.
But the feature you need can be implement in a custom plugin ; most of the code is already there (in the userpoint payment plugin) and you might want to add some new feature I guess, like letting the customer chose how many points he wants to convert into a coupon code.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.