Thank you for your reply.
We have tried to contact you via your site but the email does not work.
In fact we have an order management application for pizzerias.
A unique app for hundreds of pizzerias that have hundreds of customers.
We use the Stripe connect platform which allows us to link all our pizzerias customers to our Stripe connect account with a unique customer ID.
Example of the current system:
When a final customer places an order for 20 € on the application.
The pizzeria receives the sums of
20 € - (1.4% - 0.25 €) fees Stripe
and so he perceives: 19.43 €
We want to add our transaction fees of 2.6%.
So then the pizzeria will get the amount of:
20 € - (1.4% - 0.25 €) fees included Stripe - (2.6%) = 18.92 €
The fees will appear in the detail of the transaction fees on the stripe account of pizzeria.
Either we thought it was possible to do a development layer on your plugin or you have to do a custom development from the Stripe API.