@aregnet/iban-val/dist/index.js

IBAN validation package

/*!
 * Copyright 2023 Alexander Regnet
 */

'use strict';

const ibanValidationDefinitions = [
  { code: "AD", length: 24, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{4})([0-9A-Z]{12})/ },
  { code: "AE", length: 23, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{16})/ },
  { code: "AL", length: 28, structure: /([0-9A-Z]{4})([0-9]{8})([0-9A-Z]{16})/ },
  { code: "AT", length: 20, structure: /([0-9A-Z]{4})([0-9]{5})([0-9]{11})/ },
  { code: "AZ", length: 28, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{20})/ },
  { code: "BA", length: 20, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{3})([0-9]{8})([0-9]{2})/ },
  { code: "BE", length: 16, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{7})([0-9]{2})/ },
  { code: "BG", length: 22, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{14})/ },
  { code: "BH", length: 22, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{14})/ },
  { code: "BR", length: 29, structure: /([0-9A-Z]{4})([0-9]{8})([0-9]{5})([0-9]{10})([A-Z]{1})([0-9A-Z]{1})/ },
  { code: "CH", length: 21, structure: /([0-9A-Z]{4})([0-9]{5})([0-9A-Z]{12})/ },
  { code: "CR", length: 22, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{14})/ },
  { code: "CY", length: 28, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{5})([0-9A-Z]{16})/ },
  { code: "CZ", length: 24, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{6})([0-9]{10})/ },
  { code: "DE", length: 22, structure: /([0-9A-Z]{4})([0-9]{8})([0-9]{10})/ },
  { code: "DK", length: 18, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{9})([0-9]{1})/ },
  { code: "DO", length: 28, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{20})/ },
  { code: "EE", length: 20, structure: /([0-9A-Z]{4})([0-9]{2})([0-9]{2})([0-9]{11})([0-9]{1})/ },
  { code: "ES", length: 24, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{4})([0-9]{1})([0-9]{1})([0-9]{10})/ },
  { code: "FI", length: 18, structure: /([0-9A-Z]{4})([0-9]{6})([0-9]{7})([0-9]{1})/ },
  { code: "FO", length: 18, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{9})([0-9]{1})/ },
  { code: "FR", length: 27, structure: /([0-9A-Z]{4})([0-9]{5})([0-9]{5})([0-9A-Z]{11})([0-9]{2})/ },
  { code: "GB", length: 22, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{6})([0-9]{8})/ },
  { code: "GE", length: 22, structure: /([0-9A-Z]{4})([A-Z]{2})([0-9]{16})/ },
  { code: "GI", length: 23, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{15})/ },
  { code: "GL", length: 18, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{9})([0-9]{1})/ },
  { code: "GR", length: 27, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{4})([0-9A-Z]{16})/ },
  { code: "GT", length: 28, structure: /([0-9A-Z]{4})([0-9A-Z]{4})([0-9A-Z]{20})/ },
  { code: "HR", length: 21, structure: /([0-9A-Z]{4})([0-9]{7})([0-9]{10})/ },
  { code: "HU", length: 28, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{4})([0-9]{1})([0-9]{15})([0-9]{1})/ },
  { code: "IE", length: 22, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{6})([0-9]{8})/ },
  { code: "IL", length: 23, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{3})([0-9]{13})/ },
  { code: "IS", length: 26, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{2})([0-9]{6})([0-9]{10})/ },
  { code: "IT", length: 27, structure: /([0-9A-Z]{4})([A-Z]{1})([0-9]{5})([0-9]{5})([0-9A-Z]{12})/ },
  { code: "JO", length: 30, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{4})([0-9A-Z]{18})/ },
  { code: "KW", length: 30, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{22})/ },
  { code: "KZ", length: 20, structure: /([0-9A-Z]{4})([0-9]{3})([0-9A-Z]{13})/ },
  { code: "LB", length: 28, structure: /([0-9A-Z]{4})([0-9]{4})([0-9A-Z]{20})/ },
  { code: "LC", length: 32, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{24})/ },
  { code: "LI", length: 21, structure: /([0-9A-Z]{4})([0-9]{5})([0-9A-Z]{12})/ },
  { code: "LT", length: 20, structure: /([0-9A-Z]{4})([0-9]{5})([0-9]{11})/ },
  { code: "LU", length: 20, structure: /([0-9A-Z]{4})([0-9]{3})([0-9A-Z]{13})/ },
  { code: "LV", length: 21, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{13})/ },
  { code: "MC", length: 27, structure: /([0-9A-Z]{4})([0-9]{5})([0-9]{5})([0-9A-Z]{11})([0-9]{2})/ },
  { code: "MD", length: 24, structure: /([0-9A-Z]{4})([0-9A-Z]{2})([0-9A-Z]{18})/ },
  { code: "ME", length: 22, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{13})([0-9]{2})/ },
  { code: "MK", length: 19, structure: /([0-9A-Z]{4})([0-9]{3})([0-9A-Z]{10})([0-9]{2})/ },
  { code: "MR", length: 27, structure: /([0-9A-Z]{4})([0-9]{5})([0-9]{5})([0-9]{11})([0-9]{2})/ },
  { code: "MT", length: 31, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{5})([0-9A-Z]{18})/ },
  { code: "MU", length: 30, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{2})([0-9]{2})([0-9]{12})([0-9]{3})([A-Z]{3})/ },
  { code: "NL", length: 18, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{10})/ },
  { code: "NO", length: 15, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{6})([0-9]{1})/ },
  { code: "PK", length: 24, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{16})/ },
  { code: "PL", length: 28, structure: /([0-9A-Z]{4})([0-9]{8})([0-9]{16})/ },
  { code: "PS", length: 29, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{21})/ },
  { code: "PT", length: 25, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{4})([0-9]{11})([0-9]{2})/ },
  { code: "QA", length: 29, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{21})/ },
  { code: "RO", length: 24, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9A-Z]{16})/ },
  { code: "RS", length: 22, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{13})([0-9]{2})/ },
  { code: "SA", length: 24, structure: /([0-9A-Z]{4})([0-9]{2})([0-9A-Z]{18})/ },
  { code: "SC", length: 31, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{2})([0-9]{2})([0-9]{16})([A-Z]{3})/ },
  { code: "SE", length: 24, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{16})([0-9]{1})/ },
  { code: "SI", length: 19, structure: /([0-9A-Z]{4})([0-9]{5})([0-9]{8})([0-9]{2})/ },
  { code: "SK", length: 24, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{6})([0-9]{10})/ },
  { code: "SM", length: 27, structure: /([0-9A-Z]{4})([A-Z]{1})([0-9]{5})([0-9]{5})([0-9A-Z]{12})/ },
  { code: "ST", length: 25, structure: /([0-9A-Z]{4})([0-9]{8})([0-9]{11})([0-9]{2})/ },
  { code: "TL", length: 23, structure: /([0-9A-Z]{4})([0-9]{3})([0-9]{14})([0-9]{2})/ },
  { code: "TN", length: 24, structure: /([0-9A-Z]{4})([0-9]{2})([0-9]{3})([0-9]{13})([0-9]{2})/ },
  { code: "TR", length: 26, structure: /([0-9A-Z]{4})([0-9]{5})([0-9A-Z]{1})([0-9A-Z]{16})/ },
  { code: "UA", length: 29, structure: /([0-9A-Z]{4})([0-9]{6})([0-9A-Z]{19})/ },
  { code: "VG", length: 24, structure: /([0-9A-Z]{4})([A-Z]{4})([0-9]{16})/ },
  { code: "XK", length: 20, structure: /([0-9A-Z]{4})([0-9]{4})([0-9]{10})([0-9]{2})/ }
];

var IbanValidationErrorCode = /* @__PURE__ */ ((IbanValidationErrorCode2) => {
  IbanValidationErrorCode2[IbanValidationErrorCode2["countryNotFound"] = 10] = "countryNotFound";
  IbanValidationErrorCode2[IbanValidationErrorCode2["badLength"] = 20] = "badLength";
  IbanValidationErrorCode2[IbanValidationErrorCode2["badStructure"] = 30] = "badStructure";
  IbanValidationErrorCode2[IbanValidationErrorCode2["badChecksum"] = 40] = "badChecksum";
  IbanValidationErrorCode2[IbanValidationErrorCode2["unknown"] = 99] = "unknown";
  return IbanValidationErrorCode2;
})(IbanValidationErrorCode || {});
function getError(code) {
  switch (code) {
    case 10 /* countryNotFound */:
      return { code, message: "Country not found" };
    case 20 /* badLength */:
      return { code, message: "Bad length" };
    case 30 /* badStructure */:
      return { code, message: "Bad structure" };
    case 40 /* badChecksum */:
      return { code, message: "Bad checksum" };
    default:
      return { code: 99 /* unknown */, message: "Unknown" };
  }
}

function formatIban(iban) {
  return iban.replace(/\s/g, "").toUpperCase();
}
function checkIban(iban) {
  const ibanFormatted = formatIban(iban);
  const country = ibanFormatted.substring(0, 2);
  const res = {
    input: iban,
    iban: ibanFormatted,
    valid: false
  };
  const ibanValDef = ibanValidationDefinitions.find(
    (el) => el.code === country
  );
  if (ibanValDef === void 0) {
    res.error = getError(IbanValidationErrorCode.countryNotFound);
    return res;
  }
  if (ibanValDef.length !== ibanFormatted.length) {
    res.error = getError(IbanValidationErrorCode.badLength);
    return res;
  }
  if (!ibanValDef.structure.test(ibanFormatted)) {
    res.error = getError(IbanValidationErrorCode.badStructure);
    return res;
  }
  let ibanRestructured = ibanFormatted.substring(4);
  ibanRestructured += ibanFormatted.substring(0, 4);
  let ibanAsNumbers = "";
  [...ibanRestructured].forEach((c) => {
    if (/[A-Z]/.test(c)) {
      ibanAsNumbers += String(c.charCodeAt(0) - 55);
    } else {
      ibanAsNumbers += String(c);
    }
  });
  const modRes = modulo(ibanAsNumbers, 97);
  if (modRes !== 1) {
    res.error = getError(IbanValidationErrorCode.badChecksum);
    return res;
  }
  res.valid = true;
  return res;
}
function isValid(iban) {
  const checkRes = checkIban(iban);
  return checkRes.valid;
}
function modulo(dividend, divisor) {
  const partLength = 7;
  while (dividend.length > partLength) {
    const part = parseInt(dividend.substring(0, partLength));
    dividend = part % divisor + dividend.substring(partLength);
  }
  return parseInt(dividend) % divisor;
}

exports.checkIban = checkIban;
exports.formatIban = formatIban;
exports.isValid = isValid;
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