From 1cd4608b535ef7bde571dcb1a0bf804fa5cdc6d1 Mon Sep 17 00:00:00 2001
From: Peterjah <ps@massa.net>
Date: Tue, 31 Dec 2024 13:57:10 +0100
Subject: [PATCH] add target length prefix for target->domain index

---
 smart-contract/assembly/contracts/main.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/smart-contract/assembly/contracts/main.ts b/smart-contract/assembly/contracts/main.ts
index 2cb87ae..c76e5b7 100644
--- a/smart-contract/assembly/contracts/main.ts
+++ b/smart-contract/assembly/contracts/main.ts
@@ -119,7 +119,10 @@ function domainToTargetKey(domainBytes: StaticArray<u8>): StaticArray<u8> {
 function targetToDomainKeyPrefix(
   targetBytes: StaticArray<u8>,
 ): StaticArray<u8> {
-  return DOMAIN_SEPARATOR_KEY.concat(ADDRESS_KEY_PREFIX_V2.concat(targetBytes));
+  const lenPrefix = StaticArray.fromArray([<u8>targetBytes.length]);
+  return DOMAIN_SEPARATOR_KEY.concat(
+    ADDRESS_KEY_PREFIX_V2.concat(lenPrefix).concat(targetBytes),
+  );
 }
 
 function targetToDomainKey(