From 906fb656cbbc52f0d75e323c1ba9ad356ea9e393 Mon Sep 17 00:00:00 2001
From: Tina Zheng <tina.s.zheng+github@gmail.com>
Date: Tue, 21 Nov 2023 15:06:27 -0500
Subject: [PATCH] add erics custom error handler

---
 contracts/base/Multicall.sol | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/contracts/base/Multicall.sol b/contracts/base/Multicall.sol
index 5eccb34c..bd926766 100644
--- a/contracts/base/Multicall.sol
+++ b/contracts/base/Multicall.sol
@@ -13,6 +13,12 @@ abstract contract Multicall is IMulticall {
             (bool success, bytes memory result) = address(this).delegatecall(data[i]);
 
             if (!success) {
+                // handle custom errors
+                if (result.length == 4) {
+                    assembly {
+                        revert(add(result, 0x20), mload(result))
+                    }
+                }
                 // Next 5 lines from https://ethereum.stackexchange.com/a/83577
                 if (result.length < 68) revert();
                 assembly {