1 files changed, 43 insertions, 0 deletions
diff --git a/packages/taler-util/src/account-restrictions.ts b/packages/taler-util/src/account-restrictions.ts
new file mode 100644
index 000000000..3b3724487
--- /dev/null
+++ b/packages/taler-util/src/account-restrictions.ts
@@ -0,0 +1,43 @@
+/*
+ This file is part of GNU Taler
+ (C) 2024 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+import { InternationalizedString } from "./types-taler-common.js";
+import { AccountRestriction } from "./types-taler-exchange.js";
+
+export function checkAccountRestriction(
+  paytoUri: string,
+  restrictions: AccountRestriction[],
+): { ok: boolean; hint?: string; hintI18n?: InternationalizedString } {
+  for (const myRestriction of restrictions) {
+    switch (myRestriction.type) {
+      case "deny":
+        return { ok: false };
+      case "regex": {
+        const regex = new RegExp(myRestriction.payto_regex);
+        if (!regex.test(paytoUri)) {
+          return {
+            ok: false,
+            hint: myRestriction.human_hint,
+            hintI18n: myRestriction.human_hint_i18n,
+          };
+        }
+      }
+    }
+  }
+  return {
+    ok: true,
+  };
+}