2 files changed, 13 insertions, 3 deletions
diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index 1f0831874..d7947c8d0 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -2380,7 +2380,7 @@ bool BlockchainLMDB::for_all_key_images(std::function<bool(const crypto::key_ima
   return ret;
 }
 
-bool BlockchainLMDB::for_all_blocks(std::function<bool(uint64_t, const crypto::hash&, const cryptonote::block&)> f) const
+bool BlockchainLMDB::for_blocks_range(const uint64_t& h1, const uint64_t& h2, std::function<bool(uint64_t, const crypto::hash&, const cryptonote::block&)> f) const
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
   check_open();
@@ -2392,7 +2392,15 @@ bool BlockchainLMDB::for_all_blocks(std::function<bool(uint64_t, const crypto::h
   MDB_val v;
   bool ret = true;
 
-  MDB_cursor_op op = MDB_FIRST;
+  MDB_cursor_op op;
+  if (h1)
+  {
+    MDB_val_set(k, h1);
+	op = MDB_SET;
+  } else
+  {
+    op = MDB_FIRST;
+  }
   while (1)
   {
     int ret = mdb_cursor_get(m_cur_blocks, &k, &v, op);
@@ -2414,6 +2422,8 @@ bool BlockchainLMDB::for_all_blocks(std::function<bool(uint64_t, const crypto::h
       ret = false;
       break;
     }
+    if (height >= h2)
+      break;
   }
 
   TXN_POSTFIX_RDONLY();
diff --git a/src/blockchain_db/lmdb/db_lmdb.h b/src/blockchain_db/lmdb/db_lmdb.h
index 02f57ce18..540fababb 100644
--- a/src/blockchain_db/lmdb/db_lmdb.h
+++ b/src/blockchain_db/lmdb/db_lmdb.h
@@ -249,7 +249,7 @@ public:
   virtual bool for_all_txpool_txes(std::function<bool(const crypto::hash&, const txpool_tx_meta_t&, const cryptonote::blobdata*)> f, bool include_blob = false) const;
 
   virtual bool for_all_key_images(std::function<bool(const crypto::key_image&)>) const;
-  virtual bool for_all_blocks(std::function<bool(uint64_t, const crypto::hash&, const cryptonote::block&)>) const;
+  virtual bool for_blocks_range(const uint64_t& h1, const uint64_t& h2, std::function<bool(uint64_t, const crypto::hash&, const cryptonote::block&)>) const;
   virtual bool for_all_transactions(std::function<bool(const crypto::hash&, const cryptonote::transaction&)>) const;
   virtual bool for_all_outputs(std::function<bool(uint64_t amount, const crypto::hash &tx_hash, size_t tx_idx)> f) const;