From 8655f0979a911b5e17df10ddaa12615510580998 Mon Sep 17 00:00:00 2001
From: wireless90 <12537739+wireless90@users.noreply.github.com>
Date: Tue, 18 Oct 2022 00:00:15 +0800
Subject: [PATCH] Signature unlock Semantic validation

---
 tips/TIP-0020/tip-0020.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tips/TIP-0020/tip-0020.md b/tips/TIP-0020/tip-0020.md
index cd1e5fa7a..f24fa799e 100644
--- a/tips/TIP-0020/tip-0020.md
+++ b/tips/TIP-0020/tip-0020.md
@@ -462,7 +462,7 @@ The following criteria defines whether a payload passes the semantic validation:
   * If it is a _Signature Unlock_:
     * The `Signature Type` must match the `Address Type` of the UTXO, 
     * the BLAKE2b-256 hash of `Public Key` must match the `Address` of the UTXO and
-    * the `Signature` field must contain a valid signature for `Public Key`.
+    * the `Signature` field must contain a valid signature for the Blake2b-256 hash of the serialized `Transaction Essence`.
   * If it is a _Reference Unlock_, the referenced _Signature Unlock_ must be valid with respect to the UTXO.
   * If it is an _Alias Unlock_:
     * The address unlocking the UTXO must be an _Alias Address_.