ibantools-germany
Version:
IBAN Validator and Generator for German Bank Accounts
34 lines (33 loc) • 1.35 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 method04_1 = __importDefault(require("./method04"));
exports.default = (number) => {
const paddedNumber = (0, helper_1.paddedAccountNumber)(number);
// Variation 1
const digits = (0, helper_1.getDigits)(paddedNumber);
const givenCheckDigit = digits.pop();
const weightedDigits = (0, helper_1.weightDigitsRTL)(digits, [2, 1, 2, 1, 2, 1, 2, 1, 2]);
const crossSums = (0, helper_1.calculateCrossSums)(weightedDigits);
const sum = (0, helper_1.calculateSum)(crossSums);
const unit = (0, helper_1.getUnitFromNumber)(sum);
const calculatedCheckDigit = (0, helper_1.getUnitFromNumber)(10 - unit);
if (calculatedCheckDigit === givenCheckDigit) {
return "VALID";
}
// Variation 1, Exemption
if (paddedNumber.match(/^0000[^0]/) &&
(0, helper_1.diffNextHalfDecade)(sum) === givenCheckDigit) {
return "VALID";
}
// Variation 2
return (0, method04_1.default)(paddedNumber);
};