From ac5fa13f92b5c3cd5f6fe029f27bf409d9bb05f6 Mon Sep 17 00:00:00 2001
From: Sara Reynolds <30504811+snreynolds@users.noreply.github.com>
Date: Wed, 9 Nov 2022 19:31:28 -0500
Subject: [PATCH] use saved val (#121)

---
 src/AllowanceTransfer.sol | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/AllowanceTransfer.sol b/src/AllowanceTransfer.sol
index 803ea8b7..5b4a6e3c 100644
--- a/src/AllowanceTransfer.sol
+++ b/src/AllowanceTransfer.sol
@@ -84,7 +84,7 @@ contract AllowanceTransfer is IAllowanceTransfer, EIP712 {
                 revert InsufficientAllowance();
             } else {
                 unchecked {
-                    allowed.amount -= amount;
+                    allowed.amount = uint160(maxAmount) - amount;
                 }
             }
         }