From 53b487f678f1d965329acd08203ce68010d6aba2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Lakhal?=
 <39790678+clemlak@users.noreply.github.com>
Date: Sun, 3 Nov 2024 19:11:56 +0400
Subject: [PATCH] CVF-1, CVF-23 (#180)

---
 src/Doppler.sol | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Doppler.sol b/src/Doppler.sol
index 182c99d9..7b989d83 100644
--- a/src/Doppler.sol
+++ b/src/Doppler.sol
@@ -112,8 +112,10 @@ contract Doppler is BaseHook {
         if (_startingTime >= _endingTime) revert InvalidTimeRange();
         // Inconsistent gamma, epochs must be long enough such that the upperSlug is at least 1 tick
         // TODO: Consider whether this should check if the left side is less than tickSpacing
-        if (int256(FullMath.mulDiv(FullMath.mulDiv(_epochLength, 1e18, timeDelta), uint256(int256(_gamma)), 1e18)) == 0)
-        {
+        if (
+            _gamma <= 0
+                || FullMath.mulDiv(FullMath.mulDiv(_epochLength, 1e18, timeDelta), uint256(int256(_gamma)), 1e18) == 0
+        ) {
             revert InvalidGamma();
         }
         // _endingTime - startingTime must be divisible by epochLength