From 261d3a8d291eb422e195edfdf346e3c19991c981 Mon Sep 17 00:00:00 2001
From: hunshenshi <289517357@qq.com>
Date: Tue, 19 Mar 2024 18:42:15 +0800
Subject: [PATCH] feat(api): fix overflow in coreservice

---
 api/coreservice.go | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/api/coreservice.go b/api/coreservice.go
index 3fbfd3ad85..d83bf4f79d 100644
--- a/api/coreservice.go
+++ b/api/coreservice.go
@@ -1318,10 +1318,9 @@ func (core *coreService) reverseActionsInBlock(blk *block.Block, reverseStart, c
 	if reverseStart > size || count == 0 {
 		return nil
 	}
-	// TODO (saito): fix overflow
-	start := size - (reverseStart + count)
-	if start < 0 {
-		start = 0
+	start := uint64(0)
+	if size > reverseStart+count {
+		start = size - (reverseStart + count)
 	}
 	end := size - 1 - reverseStart
 	res := make([]*iotexapi.ActionInfo, 0, start-end+1)