From: Chris Duncan <chris@codecow.com>
Date: Wed, 5 Aug 2026 01:00:41 +0000 (-0700)
Subject: Validate subtype of frontier blocks.
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=81a585f3a0ebfe6f4205ea07c2df552b873bdf62;p=libnemo.git

Validate subtype of frontier blocks.
---

diff --git a/src/lib/account/refresh.ts b/src/lib/account/refresh.ts
index b79dd45..f956dc8 100644
--- a/src/lib/account/refresh.ts
+++ b/src/lib/account/refresh.ts
@@ -46,6 +46,9 @@ export async function _refresh (account: Account, rpc: unknown): Promise<void> {
 		throw new Error('Confirmed frontier block info subtype not found')
 	}
 	const confirmedFrontierSubtype = resConfirmedFrontierBlockInfo.subtype
+	if (!['change', 'epoch', 'open', 'receive', 'send'].includes(confirmedFrontierSubtype) {
+		throw new RangeError('Invalid subtype for confirmed frontier block', { cause: confirmedFrontierSubtype })
+	}
 	if (!('contents' in resConfirmedFrontierBlockInfo) || resConfirmedFrontierBlockInfo.contents == null || typeof resConfirmedFrontierBlockInfo.contents !== 'object') {
 		throw new Error('Confirmed frontier block info contents not found')
 	}
@@ -74,6 +77,9 @@ export async function _refresh (account: Account, rpc: unknown): Promise<void> {
 		throw new Error('Frontier block info subtype not found')
 	}
 	const frontierSubtype = resFrontierBlockInfo.subtype
+	if (!['change', 'epoch', 'open', 'receive', 'send'].includes(frontierSubtype) {
+		throw new RangeError('Invalid subtype for frontier block', { cause: frontierSubtype })
+	}
 	if (!('contents' in resFrontierBlockInfo) || resFrontierBlockInfo.contents == null || typeof resFrontierBlockInfo.contents !== 'object') {
 		throw new Error('Frontier block info contents not found')
 	}