From c3178ff942f9f487b9fda2c648aa19e633560adb Mon Sep 17 00:00:00 2001
From: Francisco Giordano <frangio.1@gmail.com>
Date: Fri, 19 Feb 2021 18:17:42 -0300
Subject: [PATCH] Add message to caution that SafeMath.sol is for Solidity 0.8

---
 contracts/math/SafeMath.sol | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/contracts/math/SafeMath.sol b/contracts/math/SafeMath.sol
index a9a3bdc8c..b1720f31e 100644
--- a/contracts/math/SafeMath.sol
+++ b/contracts/math/SafeMath.sol
@@ -2,6 +2,10 @@
 
 pragma solidity ^0.8.0;
 
+// CAUTION
+// This version of SafeMath should only be used with Solidity 0.8 or later,
+// because it relies on the compiler's built in overflow checks.
+
 /**
  * @dev Wrappers over Solidity's arithmetic operations.
  */