ibantools-germany
Version:
IBAN Validator and Generator for German Bank Accounts
46 lines (43 loc) • 1.93 kB
JavaScript
;
/**
* ibantools-germany
* Copyright (C) 2022-2024 Markus Baumer <markus@baumer.dev>
*
* This program 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.
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const helper_1 = require("../helper");
const method06_1 = require("./method06");
const method63Core = (number) => {
const paddedNumber = (0, helper_1.paddedAccountNumber)(number);
if (!paddedNumber.startsWith("0")) {
return "INVALID";
}
const digits = (0, helper_1.getDigits)(paddedNumber.slice(1, 8));
const givenCheckDigit = digits.pop(); // Check digit is last digit
const weightedDigits = (0, helper_1.weightDigitsRTL)(digits, [2, 1, 2, 1, 2, 1]);
const crossSums = (0, helper_1.calculateCrossSums)(weightedDigits);
const sum = (0, helper_1.calculateSum)(crossSums);
const calculatedCheckDigit = 10 - (0, helper_1.getUnitFromNumber)(sum);
return (0, method06_1.method06Result)(givenCheckDigit, calculatedCheckDigit);
};
exports.default = (number) => {
if (method63Core(number) === "VALID") {
return "VALID";
}
if (number.length > 8) {
return "INVALID";
}
// If validation fails, try checking it with trailing
// subaccount number 00 which is allowed to be omitted.
return method63Core(`${number}00`);
};