From 1e336413ca00f67fce63cd5d1c80f31d94f52d85 Mon Sep 17 00:00:00 2001
From: Andrew Davis <1709934+Savid@users.noreply.github.com>
Date: Mon, 19 Jun 2023 13:29:08 +1000
Subject: [PATCH] fix(execution/mimicry): empty disconnect reason

---
 pkg/execution/mimicry/message_disconnect.go | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/pkg/execution/mimicry/message_disconnect.go b/pkg/execution/mimicry/message_disconnect.go
index d989f8c..4877a43 100644
--- a/pkg/execution/mimicry/message_disconnect.go
+++ b/pkg/execution/mimicry/message_disconnect.go
@@ -21,15 +21,18 @@ func (h *Disconnect) Code() int { return DisconnectCode }
 func (h *Disconnect) ReqID() uint64 { return 0 }
 
 func (c *Client) receiveDisconnect(ctx context.Context, data []byte) *Disconnect {
-	reason := data[0:1]
-	// besu sends 2 byte disconnect message
-	if len(data) > 1 {
-		reason = data[1:2]
-	}
-
 	d := new(p2p.DiscReason)
-	if err := rlp.DecodeBytes(reason, &d); err != nil {
-		c.log.WithError(err).Debug("Error decoding disconnect")
+
+	if len(data) > 0 {
+		reason := data[0:1]
+		// besu sends 2 byte disconnect message
+		if len(data) > 1 {
+			reason = data[1:2]
+		}
+
+		if err := rlp.DecodeBytes(reason, &d); err != nil {
+			c.log.WithError(err).Debug("Error decoding disconnect")
+		}
 	}
 
 	return &Disconnect{Reason: *d}