ibantools-germany
Version:
IBAN Validator and Generator for German Bank Accounts
30 lines (29 loc) • 1.29 kB
JavaScript
;
/**
* ibantools-germany
* Copyright (c) 2022-2026 Markus Baumer <markus@baumer.dev>
* SPDX-License-Identifier: MIT OR MPL-2.0
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const helper_1 = require("../helper");
const method06_1 = require("./method06");
const method09_1 = __importDefault(require("./method09"));
exports.default = (number) => {
const paddedNumber = (0, helper_1.paddedAccountNumber)(number);
if (!paddedNumber.startsWith("0")) {
return "INVALID";
}
if (paddedNumber.startsWith("09")) {
return (0, method09_1.default)(number);
}
const digits = (0, helper_1.getDigits)(paddedNumber);
const validateDigits = [...digits.slice(1, 2), ...digits.slice(4, 9)];
const givenCheckDigit = digits.pop(); // Check digit is last digit
const weightedDigits = (0, helper_1.weightDigitsRTL)(validateDigits, [2, 3, 4, 5, 6, 7]);
const sum = (0, helper_1.calculateSum)(weightedDigits);
const { difference: calculatedCheckDigit } = (0, helper_1.moduloDifference)(sum, 11, 11);
return (0, method06_1.method06Result)(givenCheckDigit, calculatedCheckDigit);
};