Hi,
With HikaSerial, you can create a pack of serials, link the pack with the coupon generator plugin, and then link the pack in each product. That way, each time a product is purchased, a coupon code will be generated and added to the confirmation email.
If you want to generate a lot of coupon codes, you could do it via your PHPMyAdmin:
- export the hikashop_discount table as a CSV
- open the CSV file in Excel and use excel functions to generate new rows for that table
- import back the CSV in PHPMyAdmin to get all the new coupon entries