From fa912e97715ac413fc23580d24eb7918305c689a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Wo=CC=81jcik?=
 <3044353+pwojcikdev@users.noreply.github.com>
Date: Thu, 9 Jan 2025 18:44:51 +0100
Subject: [PATCH] Log block processor suspicious activity

---
 nano/node/block_processor.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/nano/node/block_processor.cpp b/nano/node/block_processor.cpp
index dd72521c8..a4f585831 100644
--- a/nano/node/block_processor.cpp
+++ b/nano/node/block_processor.cpp
@@ -392,41 +392,51 @@ nano::block_status nano::block_processor::process_one (secure::write_transaction
 			stats.inc (nano::stat::type::ledger, nano::stat::detail::old);
 			break;
 		}
+		// These are unexpected and indicate erroneous/malicious behavior, log debug info to highlight the issue
 		case nano::block_status::bad_signature:
 		{
+			logger.debug (nano::log::type::block_processor, "Block signature is invalid: {}", hash);
 			break;
 		}
 		case nano::block_status::negative_spend:
 		{
+			logger.debug (nano::log::type::block_processor, "Block spends negative amount: {}", hash);
 			break;
 		}
 		case nano::block_status::unreceivable:
 		{
+			logger.debug (nano::log::type::block_processor, "Block is unreceivable: {}", hash);
 			break;
 		}
 		case nano::block_status::fork:
 		{
 			stats.inc (nano::stat::type::ledger, nano::stat::detail::fork);
+			logger.debug (nano::log::type::block_processor, "Block is a fork: {}", hash);
 			break;
 		}
 		case nano::block_status::opened_burn_account:
 		{
+			logger.debug (nano::log::type::block_processor, "Block opens burn account: {}", hash);
 			break;
 		}
 		case nano::block_status::balance_mismatch:
 		{
+			logger.debug (nano::log::type::block_processor, "Block balance mismatch: {}", hash);
 			break;
 		}
 		case nano::block_status::representative_mismatch:
 		{
+			logger.debug (nano::log::type::block_processor, "Block representative mismatch: {}", hash);
 			break;
 		}
 		case nano::block_status::block_position:
 		{
+			logger.debug (nano::log::type::block_processor, "Block is in incorrect position: {}", hash);
 			break;
 		}
 		case nano::block_status::insufficient_work:
 		{
+			logger.debug (nano::log::type::block_processor, "Block has insufficient work: {}", hash);
 			break;
 		}
 	}