From b25931ed0e9953d98861ca1c8d7fb4ae3ba27358 Mon Sep 17 00:00:00 2001
From: Ada Fernsby <ada.fernsby@example.invalid>
Date: Mon, 9 Mar 2026 07:45:19 +0000
Subject: [PATCH] fix(format): reject amounts with no digits

parseMinor returned NaN, which reached the database as 0.
---
 web/src/format.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/web/src/format.ts b/web/src/format.ts
index fd6b21b..5d40a9f 100644
--- a/web/src/format.ts
+++ b/web/src/format.ts
@@ -1,9 +1,11 @@
 export interface Money {
   amount: number;
   currency: string;
+  locale?: string;
 }
 
 const GROUPING = 3;
+const DEFAULT_LOCALE = "en-GB";
 
 export function formatMinor(minor: number, currency: string): string {
   const sign = minor < 0 ? "-" : "";
@@ -33,5 +35,9 @@
 
 export function parseMinor(text: string): number {
   const cleaned = text.replace(/[^0-9-]/g, "");
-  return Number.parseInt(cleaned, 10);
+  const parsed = Number.parseInt(cleaned, 10);
+  if (Number.isNaN(parsed)) {
+    throw new RangeError("parseMinor: no digits in " + JSON.stringify(text));
+  }
+  return parsed;
 }
-- 
2.43.0