[Calculate Stripe Fee] Calculate stripe fee to ask customer to cover stripe fee #javascript #stripe

calculateStripeFee.js

/**
 * Calculate stripe fee from amount
 * so you can charge stripe fee to customers
 * lafif <hello@lafif.me>
 */
var fees = { 
	USD: { Percent: 2.9, Fixed: 0.30 },
	GBP: { Percent: 2.4, Fixed: 0.20 },
	EUR: { Percent: 2.4, Fixed: 0.24 },
	CAD: { Percent: 2.9, Fixed: 0.30 },
	AUD: { Percent: 2.9, Fixed: 0.30 },
	NOK: { Percent: 2.9, Fixed: 2 },
	DKK: { Percent: 2.9, Fixed: 1.8 },
	SEK: { Percent: 2.9, Fixed: 1.8 },
	JPY: { Percent: 3.6, Fixed: 0 },
	MXN: { Percent: 3.6, Fixed: 3 }
};

function calcFee(amount, currency) {
	var _fee = fees[currency];
	var amount = parseFloat(amount);
	var total = (amount + parseFloat(_fee.Fixed)) / (1 - parseFloat(_fee.Percent) / 100);
	var fee = total - amount;

	return {
		amount: amount,
		fee: fee.toFixed(2),
		total: total.toFixed(2)
	};
}

var charge_data = calcFee(100, 'USD');
alert('You should ask: ' + charge_data.total + ' to customer, to cover ' + charge_data.fee + ' fee from ' + charge_data.amount );
console.log(charge_data);

I tested the code and it doesn't return the correct amounts that are actually calculated by Stripe.
Here's my revised code:

var amount = parseFloat(amount)
var fee = amount * (parseFloat(_fee.Percent) / 100) + parseFloat(_fee.Fixed)
var total = amount + fee