Added isAbaRouting validator

README.md

@@ -90,6 +90,7 @@ Validator                               | Description
 --------------------------------------- | --------------------------------------
 **contains(str, seed [, options])**    | check if the string contains the seed.<br/><br/>`options` is an object that defaults to `{ ignoreCase: false, minOccurrences: 1 }`.<br />Options: <br/> `ignoreCase`: Ignore case when doing comparison, default false.<br/>`minOccurences`: Minimum number of occurrences for the seed in the string. Defaults to 1.
 **equals(str, comparison)**             | check if the string matches the comparison.
+**isAbaRouting(str)**               | check if the string is an ABA routing number for US bank account / cheque.
 **isAfter(str [, options])**            | check if the string is a date that is after the specified date.<br/><br/>`options` is an object that defaults to `{ comparisonDate: Date().toString() }`.<br/>**Options:**<br/>`comparisonDate`: Date to compare to. Defaults to `Date().toString()` (now).
 **isAlpha(str [, locale, options])**    | check if the string contains only letters (a-zA-Z).<br/><br/>`locale` is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'bn', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fa-IR', 'fi-FI', 'fr-CA', 'fr-FR', 'he', 'hi-IN', 'hu-HU', 'it-IT', 'ko-KR', 'ja-JP', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'si-LK', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'th-TH', 'tr-TR', 'uk-UA']` and defaults to `en-US`. Locale list is `validator.isAlphaLocales`. `options` is an optional object that can be supplied with the following key(s): `ignore` which can either be a String or RegExp of characters to be ignored e.g. " -" will ignore spaces and -'s.
 **isAlphanumeric(str [, locale, options])**      | check if the string contains only letters and numbers (a-zA-Z0-9).<br/><br/>`locale` is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bn', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fa-IR', 'fi-FI', 'fr-CA', 'fr-FR', 'he', 'hi-IN', 'hu-HU', 'it-IT', 'ko-KR', 'ja-JP','ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'si-LK', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'th-TH', 'tr-TR', 'uk-UA']`) and defaults to `en-US`. Locale list is `validator.isAlphanumericLocales`. `options` is an optional object that can be supplied with the following key(s): `ignore` which can either be a String or RegExp of characters to be ignored e.g. " -" will ignore spaces and -'s.

src/index.js

@@ -18,6 +18,7 @@ import isTime from './lib/isTime';
 import isBoolean from './lib/isBoolean';
 import isLocale from './lib/isLocale';
 
+import isAbaRouting from './lib/isAbaRouting';
 import isAlpha, { locales as isAlphaLocales } from './lib/isAlpha';
 import isAlphanumeric, { locales as isAlphanumericLocales } from './lib/isAlphanumeric';
 import isNumeric from './lib/isNumeric';
@@ -145,6 +146,7 @@ const validator = {
   isBoolean,
   isIBAN,
   isBIC,
+  isAbaRouting,
   isAlpha,
   isAlphaLocales,
   isAlphanumeric,

src/lib/isAbaRouting.js

@@ -0,0 +1,20 @@
+import assertString from './util/assertString';
+
+// http://www.brainjar.com/js/validation/
+// https://www.aba.com/news-research/research-analysis/routing-number-policy-procedures
+// series reserved for future use are excluded
+const isRoutingReg = /^(?!(1[3-9])|(20)|(3[3-9])|(4[0-9])|(5[0-9])|(60)|(7[3-9])|(8[1-9])|(9[0-2])|(9[3-9]))[0-9]{9}$/;
+
+export default function isAbaRouting(str) {
+  assertString(str);
+
+  if (!isRoutingReg.test(str)) return false;
+
+  let checkSumVal = 0;
+  for (let i = 0; i < str.length; i++) {
+    if (i % 3 === 0) checkSumVal += str[i] * 3;
+    else if (i % 3 === 1) checkSumVal += str[i] * 7;
+    else checkSumVal += str[i] * 1;
+  }
+  return (checkSumVal % 10 === 0);
+}

test/validators.test.js

@@ -5138,6 +5138,26 @@ describe('Validators', () => {
     });
   });
 
+  it('should validate ABA routing number', () => {
+    test({
+      validator: 'isAbaRouting',
+      valid: [
+        '322070381',
+        '011103093',
+        '263170175',
+        '124303065',
+      ],
+      invalid: [
+        '426317017',
+        '789456124',
+        '603558459',
+        'qwerty',
+        '12430306',
+        '382070381',
+      ],
+    });
+  });
+
   it('should validate IBAN', () => {
     test({
       validator: 'isIBAN',