initial commit

fluxer_api/src/utils/CurrencyUtils.ts

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+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+export type Currency = 'USD' | 'EUR';
+
+const EEA_COUNTRIES = [
+	'AT',
+	'BE',
+	'BG',
+	'HR',
+	'CY',
+	'CZ',
+	'DK',
+	'EE',
+	'FI',
+	'FR',
+	'DE',
+	'GR',
+	'HU',
+	'IE',
+	'IT',
+	'LV',
+	'LT',
+	'LU',
+	'MT',
+	'NL',
+	'PL',
+	'PT',
+	'RO',
+	'SK',
+	'SI',
+	'ES',
+	'SE',
+	'IS',
+	'LI',
+	'NO',
+];
+
+function isEEACountry(countryCode: string): boolean {
+	const upperCode = countryCode.toUpperCase();
+	return EEA_COUNTRIES.includes(upperCode);
+}
+
+export function getCurrency(countryCode: string | null | undefined): Currency {
+	if (!countryCode) {
+		return 'USD';
+	}
+	return isEEACountry(countryCode) ? 'EUR' : 'USD';
+}