woocommerce-paypal-payments/modules/ppcp-settings/resources/js/Components/ReusableComponents/PricingTitleBadge.js

import { __, sprintf } from '@wordpress/i18n';

import { CommonHooks } from '../../data';
import { countryPriceInfo } from '../../utils/countryPriceInfo';
import { formatPrice } from '../../utils/formatPrice';
import TitleBadge, { TITLE_BADGE_INFO } from './TitleBadge';

const getFixedAmount = ( currency, priceList, itemFixedAmount ) => {
    if ( priceList[ currency ] ) {
        const sum = priceList[ currency ] + itemFixedAmount;
		return formatPrice( sum, currency );
	}

	const [ defaultCurrency, defaultPrice ] = Object.entries( priceList )[ 0 ];
    const sum = defaultPrice + itemFixedAmount;
	return formatPrice( sum, defaultCurrency );
};

const PricingTitleBadge = ( { item } ) => {
	const { storeCountry, storeCurrency } = CommonHooks.useWooSettings();
	const infos = countryPriceInfo[ storeCountry ];
    const itemKey = item.split(' ')[0]; // Extract the first word, fastlane has more than one

    if ( ! infos || ! infos[ itemKey ] ) {
		return null;
	}

    const percentage = typeof infos[itemKey] === 'number' ? infos[itemKey].toFixed(2) : infos[itemKey]['percentage'].toFixed(2);
    const itemFixedAmount = infos[itemKey]['fixedFee'] ? infos[itemKey]['fixedFee'] : 0;
    const fixedAmount = getFixedAmount( storeCurrency, infos.fixedFee, itemFixedAmount );

	const label = sprintf(
		__( 'from %1$s%% + %2$s', 'woocommerce-paypal-payments' ),
		percentage,
		fixedAmount
	);

	return (
		<TitleBadge
			type={ TITLE_BADGE_INFO }
			text={ `${ label }<sup>1</sup>` }
		/>
	);
};

export default PricingTitleBadge;