Custom Stripe payment gateway for stripe

We need method written that will accept wholesalePrice, competitorPrice and will calculate our price based with the following formula.

ourWholesalePrice = wholesalePrice + 20;
marginDifference = competitorPrice - ourWholesalePrice;

cryptoAmount = marginDifference / 2;

ourPrice= ourWholesalePrice + cryptoAmount

If ourPrice >= competitorPrice - 5 then

ourPrice = ourWholesalePrice

The method would then process the payment on the Stripe Gateway and return the result of the payment.

We mostly need the stripe payment gateway work done