From ee78e8037b761f8da79d73aca196d4d2e9524564 Mon Sep 17 00:00:00 2001
From: qinglin89 <316032931@qq.com>
Date: Thu, 12 Jan 2023 11:51:58 +0800
Subject: [PATCH] trie: reduce fullNode to valueNode with only index[16] after
 delete

---
 trie/trie.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/trie/trie.go b/trie/trie.go
index 1a456b8cfd..353342d197 100644
--- a/trie/trie.go
+++ b/trie/trie.go
@@ -472,7 +472,9 @@ func (t *Trie) delete(n node, prefix, key []byte) (bool, node, error) {
 			}
 		}
 		if pos >= 0 {
-			if pos != 16 {
+			if pos == 16 {
+				return true, n.Children[16].(valueNode), nil
+			} else {
 				// If the remaining entry is a short node, it replaces
 				// n and its key gets the missing nibble tacked to the
 				// front. This avoids creating an invalid