Commission based on customer payment method

-- HikaShop version -- : 2.6.1
-- HikaMarket version -- : 1.6.7
-- Joomla version -- : 3.4.8

I have been asked to build a multi-vendor site with the following requirements:

• The customer can pay using any method set up ( PayPal, Stripe, Cheque, BACS etc)
• The main vendor receives the payment
• Main-vendor then pays sub-vendors after deducing commission and fees from payment provider (ie PayPal)

If there was a method of basing the commission on the payment method that the customer used I think this would could be achieved. For example if the customer paid by PayPal who charged 3.5% and the vendors commission was 10% then deducting 13.5% from the sub-vendors payment would work. If the customer paid by BACS then just 10% would be deducted.
To do this I guess would require a filter in the commission area that selects the commission rate based on the method of payment used.

Would this work?
Can it be done?

Thanks
Trevor

Thanks Jerome, that looks promising.

As the commission adjustment will vary according to the method of payment that the customer used is there a way of retrieving the payment method within the trigger functions?

regards
Trevor

Thanks again Jerome.

Time to roll up my sleeves and get my hands dirty!

regards
Trevor

I managed to get it working and have attached a copy if anyone wants to use it.

regards
Trevor