From 6b3c3d047be4ce77519dd29354c1e80d7768ca1b Mon Sep 17 00:00:00 2001
From: Mingyuan Yu <18106816+Yumingyuan@users.noreply.github.com>
Date: Mon, 23 Oct 2023 15:52:16 +0800
Subject: [PATCH] Update readme.md

change "internal"  to "public" to make the function could call by user
---
 37_Signature/readme.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/37_Signature/readme.md b/37_Signature/readme.md
index 9c887f3e1..338eea333 100644
--- a/37_Signature/readme.md
+++ b/37_Signature/readme.md
@@ -76,7 +76,7 @@ tags:
      * 以及`EIP191`:https://eips.ethereum.org/EIPS/eip-191`
      * 添加"\x19Ethereum Signed Message:\n32"字段，防止签名的是可执行交易。
      */
-    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
+    function toEthSignedMessageHash(bytes32 hash) public pure returns (bytes32) {
         // 哈希的长度为32
         return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
     }