From 9ba5ba1ff967487ce34990488b327ad22a828646 Mon Sep 17 00:00:00 2001
From: gbl186 <40903576+gbl186@users.noreply.github.com>
Date: Thu, 29 Jan 2026 19:37:52 +0100
Subject: [PATCH] Create validateMarketId.ts

Added a small validator to fail fast on malformed market IDs.
---
 src/utils/validateMarketId.ts | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 src/utils/validateMarketId.ts

diff --git a/src/utils/validateMarketId.ts b/src/utils/validateMarketId.ts
new file mode 100644
index 00000000..d20c104f
--- /dev/null
+++ b/src/utils/validateMarketId.ts
@@ -0,0 +1,7 @@
+const MARKET_ID_RE = /^[a-zA-Z0-9_-]{6,128}$/
+
+export function validateMarketId(value: string): void {
+  if (!MARKET_ID_RE.test(value)) {
+    throw new Error('Invalid market id format')
+  }
+}