From d345bb3529fc7c66b9d0419999c260809437068b Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Mon, 25 Aug 2025 18:01:34 -0300
Subject: [PATCH] betterbinary: prevent binary index overflow by casting the
 numbers to int (from uint16).

---
 eventstore/codec/betterbinary/codec.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/eventstore/codec/betterbinary/codec.go b/eventstore/codec/betterbinary/codec.go
index 37a9b27..5c24841 100644
--- a/eventstore/codec/betterbinary/codec.go
+++ b/eventstore/codec/betterbinary/codec.go
@@ -122,9 +122,9 @@ func Unmarshal(data []byte, evt *nostr.Event) (err error) {
 		nitems := int(data[tagbase+offset])
 		tag := make(nostr.Tag, nitems)
 
-		curr := tagbase + offset + 1
+		curr := int(tagbase + offset + 1)
 		for i := range tag {
-			length := binary.LittleEndian.Uint16(data[curr:])
+			length := int(binary.LittleEndian.Uint16(data[curr:]))
 			tag[i] = string(data[curr+2 : curr+2+length])
 			curr += 2 + length
 		}