diff --git a/src/blockchain_db/blockchain_db.cpp b/src/blockchain_db/blockchain_db.cpp
index 7ac046bc9..c61a81379 100644
--- a/src/blockchain_db/blockchain_db.cpp
+++ b/src/blockchain_db/blockchain_db.cpp
@@ -200,6 +200,45 @@ void BlockchainDB::remove_transaction(const crypto::hash& tx_hash)
   remove_transaction_data(tx_hash, tx);
 }
 
+block BlockchainDB::get_block_from_height(const uint64_t& height) const
+{
+  blobdata bd = get_block_blob_from_height(height);
+  block b;
+  if (!parse_and_validate_block_from_blob(bd, b))
+    throw new DB_ERROR("Failed to parse block from blob retrieved from the db");
+
+  return b;
+}
+
+block BlockchainDB::get_block(const crypto::hash& h) const
+{
+  blobdata bd = get_block_blob(h);
+  block b;
+  if (!parse_and_validate_block_from_blob(bd, b))
+    throw new DB_ERROR("Failed to parse block from blob retrieved from the db");
+
+  return b;
+}
+
+bool BlockchainDB::get_tx(const crypto::hash& h, cryptonote::transaction &tx) const
+{
+  blobdata bd;
+  if (!get_tx_blob(h, bd))
+    return false;
+  if (!parse_and_validate_tx_from_blob(bd, tx))
+    throw new DB_ERROR("Failed to parse transaction from blob retrieved from the db");
+
+  return true;
+}
+
+transaction BlockchainDB::get_tx(const crypto::hash& h) const
+{
+  transaction tx;
+  if (!get_tx(h, tx))
+    throw new TX_DNE(std::string("tx with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str());
+  return tx;
+}
+
 void BlockchainDB::reset_stats()
 {
   num_calls = 0;
diff --git a/src/blockchain_db/blockchain_db.h b/src/blockchain_db/blockchain_db.h
index b40793241..fc1f98ce0 100644
--- a/src/blockchain_db/blockchain_db.h
+++ b/src/blockchain_db/blockchain_db.h
@@ -34,6 +34,7 @@
 #include <string>
 #include <exception>
 #include "crypto/hash.h"
+#include "cryptonote_protocol/blobdatatype.h"
 #include "cryptonote_basic/cryptonote_basic.h"
 #include "cryptonote_basic/difficulty.h"
 #include "cryptonote_basic/hardfork.h"
@@ -754,7 +755,20 @@ public:
    *
    * @return the block requested
    */
-  virtual block get_block(const crypto::hash& h) const = 0;
+  virtual cryptonote::blobdata get_block_blob(const crypto::hash& h) const = 0;
+
+  /**
+   * @brief fetches the block with the given hash
+   *
+   * Returns the requested block.
+   *
+   * If the block does not exist, the subclass should throw BLOCK_DNE
+   *
+   * @param h the hash to look for
+   *
+   * @return the block requested
+   */
+  block get_block(const crypto::hash& h) const;
 
   /**
    * @brief gets the height of the block with a given hash
@@ -784,7 +798,7 @@ public:
   virtual block_header get_block_header(const crypto::hash& h) const = 0;
 
   /**
-   * @brief fetch a block by height
+   * @brief fetch a block blob by height
    *
    * The subclass should return the block at the given height.
    *
@@ -793,9 +807,21 @@ public:
    *
    * @param height the height to look for
    *
+   * @return the block blob
+   */
+  virtual cryptonote::blobdata get_block_blob_from_height(const uint64_t& height) const = 0;
+
+  /**
+   * @brief fetch a block by height
+   *
+   * If the block does not exist, that is to say if the blockchain is not
+   * that high, then the subclass should throw BLOCK_DNE
+   *
+   * @param height the height to look for
+   *
    * @return the block
    */
-  virtual block get_block_from_height(const uint64_t& height) const = 0;
+  block get_block_from_height(const uint64_t& height) const;
 
   /**
    * @brief fetch a block's timestamp
@@ -1009,20 +1035,28 @@ public:
   /**
    * @brief fetches the transaction with the given hash
    *
-   * The subclass should return the transaction stored which has the given
-   * hash.
-   *
    * If the transaction does not exist, the subclass should throw TX_DNE.
    *
    * @param h the hash to look for
    *
    * @return the transaction with the given hash
    */
-  virtual transaction get_tx(const crypto::hash& h) const = 0;
+  transaction get_tx(const crypto::hash& h) const;
 
   /**
    * @brief fetches the transaction with the given hash
    *
+   * If the transaction does not exist, the subclass should return false.
+   *
+   * @param h the hash to look for
+   *
+   * @return true iff the transaction was found
+   */
+  bool get_tx(const crypto::hash& h, transaction &tx) const;
+
+  /**
+   * @brief fetches the transaction blob with the given hash
+   *
    * The subclass should return the transaction stored which has the given
    * hash.
    *
@@ -1032,7 +1066,7 @@ public:
    *
    * @return true iff the transaction was found
    */
-  virtual bool get_tx(const crypto::hash& h, transaction &tx) const = 0;
+  virtual bool get_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const = 0;
 
   /**
    * @brief fetches the total number of transactions ever
diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index 839d0dd37..f6a4534fb 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -1460,12 +1460,12 @@ bool BlockchainLMDB::block_exists(const crypto::hash& h, uint64_t *height) const
   return ret;
 }
 
-block BlockchainLMDB::get_block(const crypto::hash& h) const
+cryptonote::blobdata BlockchainLMDB::get_block_blob(const crypto::hash& h) const
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
   check_open();
 
-  return get_block_from_height(get_block_height(h));
+  return get_block_blob_from_height(get_block_height(h));
 }
 
 uint64_t BlockchainLMDB::get_block_height(const crypto::hash& h) const
@@ -1498,7 +1498,7 @@ block_header BlockchainLMDB::get_block_header(const crypto::hash& h) const
   return get_block(h);
 }
 
-block BlockchainLMDB::get_block_from_height(const uint64_t& height) const
+cryptonote::blobdata BlockchainLMDB::get_block_blob_from_height(const uint64_t& height) const
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
   check_open();
@@ -1519,13 +1519,9 @@ block BlockchainLMDB::get_block_from_height(const uint64_t& height) const
   blobdata bd;
   bd.assign(reinterpret_cast<char*>(result.mv_data), result.mv_size);
 
-  block b;
-  if (!parse_and_validate_block_from_blob(bd, b))
-    throw0(DB_ERROR("Failed to parse block from blob retrieved from the db"));
-
   TXN_POSTFIX_RDONLY();
 
-  return b;
+  return bd;
 }
 
 uint64_t BlockchainLMDB::get_block_timestamp(const uint64_t& height) const
@@ -1868,7 +1864,7 @@ uint64_t BlockchainLMDB::get_tx_unlock_time(const crypto::hash& h) const
   return ret;
 }
 
-bool BlockchainLMDB::get_tx(const crypto::hash& h, transaction &tx) const
+bool BlockchainLMDB::get_tx_blob(const crypto::hash& h, cryptonote::blobdata &bd) const
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
   check_open();
@@ -1891,26 +1887,13 @@ bool BlockchainLMDB::get_tx(const crypto::hash& h, transaction &tx) const
   else if (get_result)
     throw0(DB_ERROR(lmdb_error("DB error attempting to fetch tx from hash", get_result).c_str()));
 
-  blobdata bd;
   bd.assign(reinterpret_cast<char*>(result.mv_data), result.mv_size);
 
-  if (!parse_and_validate_tx_from_blob(bd, tx))
-    throw0(DB_ERROR("Failed to parse tx from blob retrieved from the db"));
-
   TXN_POSTFIX_RDONLY();
 
   return true;
 }
 
-transaction BlockchainLMDB::get_tx(const crypto::hash& h) const
-{
-  transaction tx;
-
-  if (!get_tx(h, tx))
-    throw1(TX_DNE(std::string("tx with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str()));
-  return tx;
-}
-
 uint64_t BlockchainLMDB::get_tx_count() const
 {
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
diff --git a/src/blockchain_db/lmdb/db_lmdb.h b/src/blockchain_db/lmdb/db_lmdb.h
index 32236bbbd..5ea642d23 100644
--- a/src/blockchain_db/lmdb/db_lmdb.h
+++ b/src/blockchain_db/lmdb/db_lmdb.h
@@ -170,13 +170,13 @@ public:
 
   virtual bool block_exists(const crypto::hash& h, uint64_t *height = NULL) const;
 
-  virtual block get_block(const crypto::hash& h) const;
-
   virtual uint64_t get_block_height(const crypto::hash& h) const;
 
   virtual block_header get_block_header(const crypto::hash& h) const;
 
-  virtual block get_block_from_height(const uint64_t& height) const;
+  virtual cryptonote::blobdata get_block_blob(const crypto::hash& h) const;
+
+  virtual cryptonote::blobdata get_block_blob_from_height(const uint64_t& height) const;
 
   virtual uint64_t get_block_timestamp(const uint64_t& height) const;
 
@@ -207,9 +207,7 @@ public:
 
   virtual uint64_t get_tx_unlock_time(const crypto::hash& h) const;
 
-  virtual transaction get_tx(const crypto::hash& h) const;
-
-  virtual bool get_tx(const crypto::hash& h, transaction &tx) const;
+  virtual bool get_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
 
   virtual uint64_t get_tx_count() const;
 
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index ccade000f..f10e14b83 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -1431,7 +1431,7 @@ bool Blockchain::handle_alternative_block(const block& b, const crypto::hash& id
   return true;
 }
 //------------------------------------------------------------------
-bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks, std::list<transaction>& txs) const
+bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -1443,17 +1443,17 @@ bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<block
     return false;
   }
 
-  for(const block& blk : blocks)
+  for(const auto& blk : blocks)
   {
     std::list<crypto::hash> missed_ids;
-    get_transactions(blk.tx_hashes, txs, missed_ids);
+    get_transactions_blobs(blk.second.tx_hashes, txs, missed_ids);
     CHECK_AND_ASSERT_MES(!missed_ids.size(), false, "has missed transactions in own block in main blockchain");
   }
 
   return true;
 }
 //------------------------------------------------------------------
-bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const
+bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -1462,7 +1462,12 @@ bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<block
 
   for(size_t i = start_offset; i < start_offset + count && i < m_db->height();i++)
   {
-    blocks.push_back(m_db->get_block_from_height(i));
+    blocks.push_back(std::make_pair(m_db->get_block_blob_from_height(i), block()));
+    if (!parse_and_validate_block_from_blob(blocks.back().first, blocks.back().second))
+    {
+      LOG_ERROR("Invalid block");
+      return false;
+    }
   }
   return true;
 }
@@ -1480,22 +1485,22 @@ bool Blockchain::handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NO
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
   m_db->block_txn_start(true);
   rsp.current_blockchain_height = get_current_blockchain_height();
-  std::list<block> blocks;
+  std::list<std::pair<cryptonote::blobdata,block>> blocks;
   get_blocks(arg.blocks, blocks, rsp.missed_ids);
 
   for (const auto& bl: blocks)
   {
     std::list<crypto::hash> missed_tx_ids;
-    std::list<transaction> txs;
+    std::list<cryptonote::blobdata> txs;
 
     // FIXME: s/rsp.missed_ids/missed_tx_id/ ?  Seems like rsp.missed_ids
     //        is for missed blocks, not missed transactions as well.
-    get_transactions(bl.tx_hashes, txs, missed_tx_ids);
+    get_transactions_blobs(bl.second.tx_hashes, txs, missed_tx_ids);
 
     if (missed_tx_ids.size() != 0)
     {
       LOG_ERROR("Error retrieving blocks, missed " << missed_tx_ids.size()
-          << " transactions for block with hash: " << get_block_hash(bl)
+          << " transactions for block with hash: " << get_block_hash(bl.second)
           << std::endl
       );
 
@@ -1510,17 +1515,17 @@ bool Blockchain::handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NO
     rsp.blocks.push_back(block_complete_entry());
     block_complete_entry& e = rsp.blocks.back();
     //pack block
-    e.block = t_serializable_object_to_blob(bl);
+    e.block = bl.first;
     //pack transactions
-    for (transaction& tx: txs)
-      e.txs.push_back(t_serializable_object_to_blob(tx));
+    for (const cryptonote::blobdata& tx: txs)
+      e.txs.push_back(tx);
   }
   //get another transactions, if need
-  std::list<transaction> txs;
-  get_transactions(arg.txs, txs, rsp.missed_ids);
+  std::list<cryptonote::blobdata> txs;
+  get_transactions_blobs(arg.txs, txs, rsp.missed_ids);
   //pack aside transactions
   for (const auto& tx: txs)
-    rsp.txs.push_back(t_serializable_object_to_blob(tx));
+    rsp.txs.push_back(tx);
 
   m_db->block_txn_stop();
   return true;
@@ -1889,7 +1894,12 @@ bool Blockchain::get_blocks(const t_ids_container& block_ids, t_blocks_container
   {
     try
     {
-      blocks.push_back(m_db->get_block(block_hash));
+      blocks.push_back(std::make_pair(m_db->get_block_blob(block_hash), block()));
+      if (!parse_and_validate_block_from_blob(blocks.back().first, blocks.back().second))
+      {
+        LOG_ERROR("Invalid block");
+        return false;
+      }
     }
     catch (const BLOCK_DNE& e)
     {
@@ -1906,7 +1916,7 @@ bool Blockchain::get_blocks(const t_ids_container& block_ids, t_blocks_container
 //TODO: return type should be void, throw on exception
 //       alternatively, return true only if no transactions missed
 template<class t_ids_container, class t_tx_container, class t_missed_container>
-bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const
+bool Blockchain::get_transactions_blobs(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -1915,8 +1925,8 @@ bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container
   {
     try
     {
-      transaction tx;
-      if (m_db->get_tx(tx_hash, tx))
+      cryptonote::blobdata tx;
+      if (m_db->get_tx_blob(tx_hash, tx))
         txs.push_back(std::move(tx));
       else
         missed_txs.push_back(tx_hash);
@@ -1929,6 +1939,37 @@ bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container
   return true;
 }
 //------------------------------------------------------------------
+template<class t_ids_container, class t_tx_container, class t_missed_container>
+bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const
+{
+  LOG_PRINT_L3("Blockchain::" << __func__);
+  CRITICAL_REGION_LOCAL(m_blockchain_lock);
+
+  for (const auto& tx_hash : txs_ids)
+  {
+    try
+    {
+      cryptonote::blobdata tx;
+      if (m_db->get_tx_blob(tx_hash, tx))
+      {
+        txs.push_back(transaction());
+        if (!parse_and_validate_tx_from_blob(tx, txs.back()))
+        {
+          LOG_ERROR("Invalid transaction");
+          return false;
+        }
+      }
+      else
+        missed_txs.push_back(tx_hash);
+    }
+    catch (const std::exception& e)
+    {
+      return false;
+    }
+  }
+  return true;
+}
+//------------------------------------------------------------------
 void Blockchain::print_blockchain(uint64_t start_index, uint64_t end_index) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
@@ -2001,7 +2042,7 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
 // find split point between ours and foreign blockchain (or start at
 // blockchain height <req_start_block>), and return up to max_count FULL
 // blocks by reference.
-bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<block, std::list<transaction> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const
+bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   CRITICAL_REGION_LOCAL(m_blockchain_lock);
@@ -2030,9 +2071,11 @@ bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, cons
   for(size_t i = start_height; i < total_height && count < max_count; i++, count++)
   {
     blocks.resize(blocks.size()+1);
-    blocks.back().first = m_db->get_block_from_height(i);
+    blocks.back().first = m_db->get_block_blob_from_height(i);
+    block b;
+    CHECK_AND_ASSERT_MES(parse_and_validate_block_from_blob(blocks.back().first, b), false, "internal error, invalid block");
     std::list<crypto::hash> mis;
-    get_transactions(blocks.back().first.tx_hashes, blocks.back().second, mis);
+    get_transactions_blobs(b.tx_hashes, blocks.back().second, mis);
     CHECK_AND_ASSERT_MES(!mis.size(), false, "internal error, transaction from block not found");
   }
   m_db->block_txn_stop();
@@ -4015,3 +4058,7 @@ bool Blockchain::for_all_outputs(std::function<bool(uint64_t amount, const crypt
 {
   return m_db->for_all_outputs(f);;
 }
+
+namespace cryptonote {
+template bool Blockchain::get_transactions(const std::vector<crypto::hash>&, std::list<transaction>&, std::list<crypto::hash>&) const;
+}
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index c806c3505..7315ea735 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -153,7 +153,7 @@ namespace cryptonote
      *
      * @return false if start_offset > blockchain height, else true
      */
-    bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks, std::list<transaction>& txs) const;
+    bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const;
 
     /**
      * @brief get blocks from blocks based on start height and count
@@ -164,7 +164,7 @@ namespace cryptonote
      *
      * @return false if start_offset > blockchain height, else true
      */
-    bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const;
+    bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const;
 
     /**
      * @brief compiles a list of all blocks stored as alternative chains
@@ -407,7 +407,7 @@ namespace cryptonote
      *
      * @return true if a block found in common or req_start_block specified, else false
      */
-    bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<block, std::list<transaction> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const;
+    bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const;
 
     /**
      * @brief retrieves a set of blocks and their transactions, and possibly other transactions
@@ -621,9 +621,10 @@ namespace cryptonote
      * @return false if an unexpected exception occurs, else true
      */
     template<class t_ids_container, class t_tx_container, class t_missed_container>
+    bool get_transactions_blobs(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const;
+    template<class t_ids_container, class t_tx_container, class t_missed_container>
     bool get_transactions(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const;
 
-
     //debug functions
 
     /**
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index fd509b603..fc34b3adc 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -198,15 +198,31 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks, std::list<transaction>& txs) const
+  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const
   {
     return m_blockchain_storage.get_blocks(start_offset, count, blocks, txs);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const
+  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const
   {
     return m_blockchain_storage.get_blocks(start_offset, count, blocks);
-  }  //-----------------------------------------------------------------------------------------------
+  }
+  //-----------------------------------------------------------------------------------------------
+  bool core::get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const
+  {
+    std::list<std::pair<cryptonote::blobdata, cryptonote::block>> bs;
+    if (!m_blockchain_storage.get_blocks(start_offset, count, bs))
+      return false;
+    for (const auto &b: bs)
+      blocks.push_back(b.second);
+    return true;
+  }
+  //-----------------------------------------------------------------------------------------------
+  bool core::get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<cryptonote::blobdata>& txs, std::list<crypto::hash>& missed_txs) const
+  {
+    return m_blockchain_storage.get_transactions_blobs(txs_ids, txs, missed_txs);
+  }
+  //-----------------------------------------------------------------------------------------------
   bool core::get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<transaction>& txs, std::list<crypto::hash>& missed_txs) const
   {
     return m_blockchain_storage.get_transactions(txs_ids, txs, missed_txs);
@@ -795,7 +811,7 @@ namespace cryptonote
     return m_blockchain_storage.find_blockchain_supplement(qblock_ids, resp);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<block, std::list<transaction> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const
+  bool core::find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const
   {
     return m_blockchain_storage.find_blockchain_supplement(req_start_block, qblock_ids, blocks, total_height, start_height, max_count);
   }
@@ -863,8 +879,8 @@ namespace cryptonote
       arg.hop = 0;
       arg.current_blockchain_height = m_blockchain_storage.get_current_blockchain_height();
       std::list<crypto::hash> missed_txs;
-      std::list<transaction> txs;
-      m_blockchain_storage.get_transactions(b.tx_hashes, txs, missed_txs);
+      std::list<cryptonote::blobdata> txs;
+      m_blockchain_storage.get_transactions_blobs(b.tx_hashes, txs, missed_txs);
       if(missed_txs.size() &&  m_blockchain_storage.get_block_id_by_height(get_block_height(b)) != get_block_hash(b))
       {
         LOG_PRINT_L1("Block found but, seems that reorganize just happened after that, do not relay this block");
@@ -876,7 +892,7 @@ namespace cryptonote
       block_to_blob(b, arg.b.block);
       //pack transactions
       for(auto& tx:  txs)
-        arg.b.txs.push_back(t_serializable_object_to_blob(tx));
+        arg.b.txs.push_back(tx);
 
       m_pprotocol->relay_block(arg, exclude_context);
     }
diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h
index 43435b0c3..93604bf94 100644
--- a/src/cryptonote_core/cryptonote_core.h
+++ b/src/cryptonote_core/cryptonote_core.h
@@ -287,16 +287,23 @@ namespace cryptonote
      bool get_blockchain_top(uint64_t& height, crypto::hash& top_id) const;
 
      /**
-      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<block>&, std::list<transaction>&) const
+      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&, std::list<transaction>&) const
       *
-      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<block>&, std::list<transaction>&) const
+      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&, std::list<transaction>&) const
       */
-     bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks, std::list<transaction>& txs) const;
+     bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks, std::list<cryptonote::blobdata>& txs) const;
 
      /**
-      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<block>&) const
+      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
       *
-      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<block>&) const
+      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
+      */
+     bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata,block>>& blocks) const;
+
+     /**
+      * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
+      *
+      * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<std::pair<cryptonote::blobdata,block>>&) const
       */
      bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const;
 
@@ -318,6 +325,13 @@ namespace cryptonote
       */
      crypto::hash get_block_id_by_height(uint64_t height) const;
 
+     /**
+      * @copydoc Blockchain::get_transactions
+      *
+      * @note see Blockchain::get_transactions
+      */
+     bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<cryptonote::blobdata>& txs, std::list<crypto::hash>& missed_txs) const;
+
      /**
       * @copydoc Blockchain::get_transactions
       *
@@ -431,11 +445,11 @@ namespace cryptonote
      bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const;
 
      /**
-      * @copydoc Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::list<std::pair<block, std::list<transaction> > >&, uint64_t&, uint64_t&, size_t) const
+      * @copydoc Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >&, uint64_t&, uint64_t&, size_t) const
       *
-      * @note see Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::list<std::pair<block, std::list<transaction> > >&, uint64_t&, uint64_t&, size_t) const
+      * @note see Blockchain::find_blockchain_supplement(const uint64_t, const std::list<crypto::hash>&, std::list<std::pair<cryptonote::blobdata, std::list<transaction> > >&, uint64_t&, uint64_t&, size_t) const
       */
-     bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<block, std::list<transaction> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const;
+     bool find_blockchain_supplement(const uint64_t req_start_block, const std::list<crypto::hash>& qblock_ids, std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > >& blocks, uint64_t& total_height, uint64_t& start_height, size_t max_count) const;
 
      /**
       * @brief gets some stats about the daemon
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index 7353b3124..31b4d0b87 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -634,6 +634,9 @@ namespace cryptonote
   int t_cryptonote_protocol_handler<t_core>::handle_request_fluffy_missing_tx(int command, NOTIFY_REQUEST_FLUFFY_MISSING_TX::request& arg, cryptonote_connection_context& context)
   {
     MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_FLUFFY_MISSING_TX (" << arg.missing_tx_indices.size() << " txes), block hash " << arg.block_hash);
+    
+    std::list<std::pair<cryptonote::blobdata, block>> local_blocks;
+    std::list<cryptonote::blobdata> local_txs;
 
     block b;
     if (!m_core.get_block_by_hash(arg.block_hash, b))
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 157076e82..4570a3715 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -151,7 +151,7 @@ namespace cryptonote
   bool core_rpc_server::on_get_blocks(const COMMAND_RPC_GET_BLOCKS_FAST::request& req, COMMAND_RPC_GET_BLOCKS_FAST::response& res)
   {
     CHECK_CORE_BUSY();
-    std::list<std::pair<block, std::list<transaction> > > bs;
+    std::list<std::pair<cryptonote::blobdata, std::list<cryptonote::blobdata> > > bs;
 
     if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, bs, res.current_height, res.start_height, COMMAND_RPC_GET_BLOCKS_FAST_MAX_COUNT))
     {
@@ -159,24 +159,30 @@ namespace cryptonote
       return false;
     }
 
-    for(auto& b: bs)
+    for(auto& bd: bs)
     {
       res.blocks.resize(res.blocks.size()+1);
-      res.blocks.back().block = block_to_blob(b.first);
+      res.blocks.back().block = bd.first;
       res.output_indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices());
       res.output_indices.back().indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::tx_output_indices());
-      bool r = m_core.get_tx_outputs_gindexs(get_transaction_hash(b.first.miner_tx), res.output_indices.back().indices.back().indices);
+      block b;
+      if (!parse_and_validate_block_from_blob(bd.first, b))
+      {
+        res.status = "Invalid block";
+        return false;
+      }
+      bool r = m_core.get_tx_outputs_gindexs(get_transaction_hash(b.miner_tx), res.output_indices.back().indices.back().indices);
       if (!r)
       {
         res.status = "Failed";
         return false;
       }
       size_t txidx = 0;
-      for(auto& t: b.second)
+      for(const auto& t: bd.second)
       {
-        res.blocks.back().txs.push_back(tx_to_blob(t));
+        res.blocks.back().txs.push_back(t);
         res.output_indices.back().indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::tx_output_indices());
-        bool r = m_core.get_tx_outputs_gindexs(b.first.tx_hashes[txidx++], res.output_indices.back().indices.back().indices);
+        bool r = m_core.get_tx_outputs_gindexs(b.tx_hashes[txidx++], res.output_indices.back().indices.back().indices);
         if (!r)
         {
           res.status = "Failed";
diff --git a/tests/core_proxy/core_proxy.h b/tests/core_proxy/core_proxy.h
index 09e16c4cc..d362f09b8 100644
--- a/tests/core_proxy/core_proxy.h
+++ b/tests/core_proxy/core_proxy.h
@@ -91,7 +91,7 @@ namespace tests
     virtual void on_transaction_relayed(const cryptonote::blobdata& tx) {}
     bool get_testnet() const { return false; }
     bool get_pool_transaction(const crypto::hash& id, cryptonote::transaction& tx) const { return false; }
-    bool get_blocks(uint64_t start_offset, size_t count, std::list<cryptonote::block>& blocks, std::list<cryptonote::transaction>& txs) const { return false; }
+    bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata, cryptonote::block>>& blocks, std::list<cryptonote::blobdata>& txs) const { return false; }
     bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<cryptonote::transaction>& txs, std::list<crypto::hash>& missed_txs) const { return false; }
     bool get_block_by_hash(const crypto::hash &h, cryptonote::block &blk, bool *orphan = NULL) const { return false; }
   };
diff --git a/tests/unit_tests/ban.cpp b/tests/unit_tests/ban.cpp
index 88bbf7eec..f859c6f10 100644
--- a/tests/unit_tests/ban.cpp
+++ b/tests/unit_tests/ban.cpp
@@ -66,7 +66,7 @@ public:
   virtual void on_transaction_relayed(const cryptonote::blobdata& tx) {}
   bool get_testnet() const { return false; }
   bool get_pool_transaction(const crypto::hash& id, cryptonote::transaction& tx) const { return false; }
-  bool get_blocks(uint64_t start_offset, size_t count, std::list<cryptonote::block>& blocks, std::list<cryptonote::transaction>& txs) const { return false; }
+  bool get_blocks(uint64_t start_offset, size_t count, std::list<std::pair<cryptonote::blobdata, cryptonote::block>>& blocks, std::list<cryptonote::blobdata>& txs) const { return false; }
   bool get_transactions(const std::vector<crypto::hash>& txs_ids, std::list<cryptonote::transaction>& txs, std::list<crypto::hash>& missed_txs) const { return false; }
   bool get_block_by_hash(const crypto::hash &h, cryptonote::block &blk, bool *orphan = NULL) const { return false; }
 };
diff --git a/tests/unit_tests/hardfork.cpp b/tests/unit_tests/hardfork.cpp
index 81cf32c8b..7ca5ad09d 100644
--- a/tests/unit_tests/hardfork.cpp
+++ b/tests/unit_tests/hardfork.cpp
@@ -59,7 +59,9 @@ public:
   virtual void block_txn_abort() {}
   virtual void drop_hard_fork_info() {}
   virtual bool block_exists(const crypto::hash& h, uint64_t *height) const { return false; }
-  virtual block get_block(const crypto::hash& h) const { return block(); }
+  virtual blobdata get_block_blob_from_height(const uint64_t& height) const { return blobdata(); }
+  virtual blobdata get_block_blob(const crypto::hash& h) const { return blobdata(); }
+  virtual bool get_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const { return false; }
   virtual uint64_t get_block_height(const crypto::hash& h) const { return 0; }
   virtual block_header get_block_header(const crypto::hash& h) const { return block_header(); }
   virtual uint64_t get_block_timestamp(const uint64_t& height) const { return 0; }