Added Croatian (HR) extra BBAN validation

Simplify · Nov 27, 2021 · f9a1083 · f9a1083
1 parent b535111
commit f9a1083
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Showing 3 changed files with 43 additions and 3 deletions.
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,6 @@
+2021-11-27  Saša Jovanić <sasa@simplify.ba>
+	* Added Croatian (HR) BBAN validation
+
 2021-11-25  Saša Jovanić <sasa@simplify.ba>
 	* Version 4.1.0
 	* Added Belgian (BE) extra BBAN validation

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ibantools",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "Validation, extraction and creation of IBAN, BBAN, BIC/SWIFT numbers plus some other helpful stuff like ISO 3136-1 alpha 2 country list",
   "keywords": [
     "IBAN",

diff --git a/src/IBANTools.ts b/src/IBANTools.ts
@@ -9,7 +9,7 @@
  * @package Documentation
  * @author Saša Jovanić
  * @module ibantools
- * @version 4.1.0
+ * @version 4.1.1
  * @license MPL-2.0
  * @preferred
  */
@@ -634,6 +634,37 @@ const checkSpainBBAN = (bban: string): boolean => {
   return controlAccount === (remainder === 0 ? 0 : remainder === 1 ? 1 : 11 - remainder);
 };
 
+/**
+ * Mod 11/10 check
+ *
+ * @ignore
+ */
+const checkMod1110 = (toCheck: string, control: number): boolean => {
+  let nr = 10;
+  for (let index = 0; index < toCheck.length; index++) {
+    nr += parseInt(toCheck.charAt(index), 10);
+    if (nr % 10 !== 0) {
+      nr = nr % 10;
+    }
+    nr = nr * 2;
+    nr = nr % 11;
+  }
+  return control === (11 - nr === 10 ? 0 : 11 - nr);
+};
+
+/**
+ * Croatian (HR) BBAN check
+ *
+ * @ignore
+ */
+const checkCroatianBBAN = (bban: string): boolean => {
+  const controlBankBranch = parseInt(bban.charAt(6), 10);
+  const controlAccount = parseInt(bban.charAt(16), 10);
+  const bankBranch = bban.substring(0, 6);
+  const account = bban.substring(7, 16);
+  return checkMod1110(bankBranch, controlBankBranch) && checkMod1110(account, controlAccount);
+};
+
 /**
  * Country specifications
  */
@@ -878,7 +909,13 @@ export const countrySpecs: CountryMapInternal = {
     chars: 28,
     bban_regexp: '^[A-Z]{4}[0-9]{20}$',
   },
-  HR: { chars: 21, bban_regexp: '^[0-9]{17}$', IBANRegistry: true, SEPA: true },
+  HR: {
+    chars: 21,
+    bban_regexp: '^[0-9]{17}$',
+    bban_validation_func: checkCroatianBBAN,
+    IBANRegistry: true,
+    SEPA: true,
+  },
   HT: {},
   HU: { chars: 28, bban_regexp: '^[0-9]{24}$', IBANRegistry: true, SEPA: true },
   ID: {},