Hello,
Thanks for the precision.
You can edit the file "administrator/components/com_hikamarket/classes/vendor.php" and replace
$status = $shopOrderClass->save($order);
By
$shopOrderClass->sendEmailAfterOrderCreation = !$feeMode;
$status = $shopOrderClass->save($order);
So it will not send anymore the HikaShop order creation notification email to the vendor.
HikaMarket do not check the order type to send the emails ; so when the order is created, even if it's a "vendor payment" and not a "sale", it send the notification email to the customer (and in our case, the "customer" is the vendor administrator).
For the rest, it would require to create a new kind of email that HikaMarket could use to notify the vendor that he received a payment.
In the case where you're in "vendor paid directly" mode ; the patch will let HikaShop send the email so the vendor (because it won't be a "vendor payment" but right a "sale" to let the vendor pay your store).
Regards,