blockchain: Log more useful data

src/blockchain_db/lmdb/db_lmdb.cpp

@@ -39,6 +39,7 @@
 #include "file_io_utils.h"
 #include "common/file.h"
 #include "common/pruning.h"
+#include "common/hex.h"
 #include "cryptonote_basic/cryptonote_format_utils.h"
 #include "crypto/crypto.h"
 #include "profile_tools.h"
@@ -2588,7 +2589,7 @@ uint64_t BlockchainLMDB::get_block_height(const crypto::hash& h) const
   MDB_val_set(key, h);
   auto get_result = mdb_cursor_get(m_cur_block_heights, (MDB_val *)&zerokval, &key, MDB_GET_BOTH);
   if (get_result == MDB_NOTFOUND)
-    throw1(BLOCK_DNE("Attempted to retrieve non-existent block height"));
+    throw1(BLOCK_DNE("Attempted to retrieve non-existent block height from hash " + tools::type_to_hex(h)));
   else if (get_result)
     throw0(DB_ERROR("Error attempting to retrieve a block height from the db"));
 

src/cryptonote_core/service_node_list.cpp

@@ -1424,6 +1424,7 @@ namespace service_nodes
     catch(std::exception const &e)
     {
       // ignore not found block, try alt db
+      LOG_PRINT_L1("Block " << hash << " not found in main DB, searching alt DB");
       cryptonote::alt_block_data_t alt_data;
       cryptonote::blobdata blob;
       if (!db.get_alt_block(hash, &alt_data, &blob, nullptr))
@@ -1433,7 +1434,10 @@ namespace service_nodes
       }
 
       if (!cryptonote::parse_and_validate_block_from_blob(blob, block, nullptr))
+      {
+        MERROR("Failed to parse alt block blob at " << alt_data.height << ":" << hash);
         return false;
+      }
     }
 
     return true;

src/cryptonote_core/service_node_voting.cpp

@@ -366,7 +366,10 @@ namespace service_nodes
       }
 
       if (!verify_quorum_signatures(quorum, quorum_type::checkpointing, hf_version, checkpoint.height, checkpoint.block_hash, checkpoint.signatures, std::any{}))
+      {
+        LOG_PRINT_L1("Checkpoint failed signature validation at block " << checkpoint.height << " " << checkpoint.block_hash);
         return false;
+      }
     }
     else
     {