From 192591f38b4f2b0bdaf6debeb222891f2afd8b2d Mon Sep 17 00:00:00 2001
From: Robert Chu <allegrormc@gmail.com>
Date: Thu, 22 Aug 2024 13:20:43 -0700
Subject: [PATCH] Improves error during output encoding errors.

---
 src/mock-contract.ts | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/mock-contract.ts b/src/mock-contract.ts
index 6bc5275..c626eb3 100644
--- a/src/mock-contract.ts
+++ b/src/mock-contract.ts
@@ -76,10 +76,17 @@ export const deployMock = async <C extends BaseContract>(
           // Encode function call data using ethers v6:
           const iface = new Interface([call.abi]);
           const fnSigHash = calculateFnSigHash(call);
-          const encodedOutputs = iface.encodeFunctionResult(
-            call.abi,
-            call.outputs,
-          );
+          let encodedOutputs: string;
+          try {
+            encodedOutputs = iface.encodeFunctionResult(
+              call.abi,
+              call.outputs,
+            );
+          } catch (e) {
+            const err = e as Error;
+            err.message = `[${call.abi.selector}]: ${err.message}`;
+            throw err;
+          }
           // Use a mock function to return the expected return value
           if (firstCall) {
             await mockDeployed.__doppelganger__mockReturns(