ibantools-germany
Version:
IBAN Validator and Generator for German Bank Accounts
24 lines (23 loc) • 917 B
JavaScript
;
/**
* ibantools-germany
* Copyright (c) 2022-2026 Markus Baumer <markus@baumer.dev>
* SPDX-License-Identifier: MIT OR MPL-2.0
*/
Object.defineProperty(exports, "__esModule", { value: true });
const helper_1 = require("../helper");
exports.default = (number) => {
const digits = (0, helper_1.getDigits)(number);
const givenCheckDigit = digits.pop(); // Check digit is last digit
const weightedDigits = (0, helper_1.weightDigitsRTL)(digits, [2, 1, 2, 1, 2, 1, 2, 1, 2]);
const crossSums = (0, helper_1.calculateCrossSums)(weightedDigits);
const sumPlus7 = (0, helper_1.calculateSum)(crossSums) + 7;
const calculatedCheckDigit = 10 - (0, helper_1.getUnitFromNumber)(sumPlus7);
if (calculatedCheckDigit === 10 && givenCheckDigit === 0) {
return "VALID";
}
if (calculatedCheckDigit === givenCheckDigit) {
return "VALID";
}
return "INVALID";
};