From ffed0deb6377f3682c6261fd52f24a6d203d0fa5 Mon Sep 17 00:00:00 2001
From: DaniPopes <57450786+DaniPopes@users.noreply.github.com>
Date: Tue, 19 Mar 2024 19:13:44 +0100
Subject: [PATCH] chore: provide a better error message for unknown cheatcodes
 (#7436)

---
 crates/cheatcodes/src/inspector.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/crates/cheatcodes/src/inspector.rs b/crates/cheatcodes/src/inspector.rs
index bf39684b4955..699840d9325a 100644
--- a/crates/cheatcodes/src/inspector.rs
+++ b/crates/cheatcodes/src/inspector.rs
@@ -222,7 +222,17 @@ impl Cheatcodes {
         call: &CallInputs,
     ) -> Result {
         // decode the cheatcode call
-        let decoded = Vm::VmCalls::abi_decode(&call.input, false)?;
+        let decoded = Vm::VmCalls::abi_decode(&call.input, false).map_err(|e| {
+            if let alloy_sol_types::Error::UnknownSelector { name: _, selector } = e {
+                let msg = format!(
+                    "unknown cheatcode with selector {selector}; \
+                     you may have a mismatch between the `Vm` interface (likely in `forge-std`) \
+                     and the `forge` version"
+                );
+                return alloy_sol_types::Error::Other(std::borrow::Cow::Owned(msg));
+            }
+            e
+        })?;
         let caller = call.context.caller;
 
         // ensure the caller is allowed to execute cheatcodes,