From c1e9e58d0dd2a3bf898045ca1789543e3ed29611 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=96mer=20Faruk=20IRMAK?= <omerfirmak@gmail.com>
Date: Fri, 1 Dec 2023 19:02:00 +0300
Subject: [PATCH] Fix potential nil panic in LegacyTraceTransaction

---
 rpc/handlers.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rpc/handlers.go b/rpc/handlers.go
index d7f1628072..39f9f5a911 100644
--- a/rpc/handlers.go
+++ b/rpc/handlers.go
@@ -1354,7 +1354,7 @@ func (h *Handler) TraceTransaction(ctx context.Context, hash felt.Felt) (json.Ra
 // https://github.com/starkware-libs/starknet-specs/blob/1ae810e0137cc5d175ace4554892a4f43052be56/api/starknet_trace_api_openrpc.json#L11
 func (h *Handler) LegacyTraceTransaction(ctx context.Context, hash felt.Felt) (json.RawMessage, *jsonrpc.Error) {
 	trace, err := h.traceTransaction(ctx, &hash, true)
-	if err.Code == ErrTxnHashNotFound.Code {
+	if err != nil && err.Code == ErrTxnHashNotFound.Code {
 		err = ErrInvalidTxHash
 	}
 	return trace, err