Hello,
It requires to create 2 HikaShop products.
The first one with the "default price" and link to the plan to "create" the subscription.
The other product, with the "discount price" and a link to the plan to "renew" the subscription.
The second product should not be visible in your shop (not in a visible category) but should be published so it can be bought.
The renewal is done via the "subscription listing" panel ; so the user doesn't need to browse your shop. The final price will be display to the user. You can choose to let the "default price" and create a discount for the renewal product, it would be the same result.
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.