From e9b2c28c377f592f9d4b5d21801e93a03aa0db38 Mon Sep 17 00:00:00 2001
From: Thomas Haller <thomashaller@gmx.at>
Date: Wed, 7 Aug 2024 00:40:35 +0200
Subject: [PATCH]  error CryptoInvalidV();

---
 contracts/ClaimContract.sol | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/contracts/ClaimContract.sol b/contracts/ClaimContract.sol
index 7a4e632..1794e03 100644
--- a/contracts/ClaimContract.sol
+++ b/contracts/ClaimContract.sol
@@ -1,4 +1,4 @@
-
+// 
 pragma solidity >=0.8.1 <0.9.0;
 
 contract ClaimContract {
@@ -102,6 +102,9 @@ contract ClaimContract {
     /// @dev Claim Error: Signature does not match
     error ClaimErrorSignatureMissmatch();
 
+    /// @dev Provided v value is invalid for Ethereum signatures.
+    error CryptoInvalidV();
+
     event Claim(
         bytes20 indexed _from,
         address _to,
@@ -295,8 +298,9 @@ contract ClaimContract {
         bytes32 _r,
         bytes32 _s
     ) public view returns (bool) {
-        require(_v >= 27 && _v <= 30, "v invalid");
 
+        if (_v < 27 || _v > 30) revert CryptoInvalidV();
+        
         /*
           ecrecover() returns an Eth address rather than a public key, so
           we must do the same to compare.