cryptonote: block parsing + hash calculation speedup

This saves a duplicate serialization step

src/cryptonote_basic/cryptonote_format_utils.cpp

@@ -1143,12 +1143,19 @@ namespace cryptonote
     return blob;
   }
   //---------------------------------------------------------------
-  bool calculate_block_hash(const block& b, crypto::hash& res)
+  bool calculate_block_hash(const block& b, crypto::hash& res, const blobdata *blob)
   {
+    blobdata bd;
+    if (!blob)
+    {
+      bd = block_to_blob(b);
+      blob = &bd;
+    }
+
     // EXCEPTION FOR BLOCK 202612
     const std::string correct_blob_hash_202612 = "3a8a2b3a29b50fc86ff73dd087ea43c6f0d6b8f936c849194d5c84c737903966";
     const std::string existing_block_id_202612 = "bbd604d2ba11ba27935e006ed39c9bfdd99b76bf4a50654bc1e1e61217962698";
-    crypto::hash block_blob_hash = get_blob_hash(block_to_blob(b));
+    crypto::hash block_blob_hash = get_blob_hash(*blob);
 
     if (string_tools::pod_to_hex(block_blob_hash) == correct_blob_hash_202612)
     {
@@ -1239,7 +1246,7 @@ namespace cryptonote
     return p;
   }
   //---------------------------------------------------------------
-  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b)
+  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b, crypto::hash *block_hash)
   {
     std::stringstream ss;
     ss << b_blob;
@@ -1248,9 +1255,26 @@ namespace cryptonote
     CHECK_AND_ASSERT_MES(r, false, "Failed to parse block from blob");
     b.invalidate_hashes();
     b.miner_tx.invalidate_hashes();
+    if (block_hash)
+    {
+      calculate_block_hash(b, *block_hash, &b_blob);
+      ++block_hashes_calculated_count;
+      b.hash = *block_hash;
+      b.set_hash_valid(true);
+    }
     return true;
   }
   //---------------------------------------------------------------
+  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b)
+  {
+    return parse_and_validate_block_from_blob(b_blob, b, NULL);
+  }
+  //---------------------------------------------------------------
+  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b, crypto::hash &block_hash)
+  {
+    return parse_and_validate_block_from_blob(b_blob, b, &block_hash);
+  }
+  //---------------------------------------------------------------
   blobdata block_to_blob(const block& b)
   {
     return t_serializable_object_to_blob(b);

src/cryptonote_basic/cryptonote_format_utils.h

@@ -114,12 +114,14 @@ namespace cryptonote
   crypto::hash get_pruned_transaction_hash(const transaction& t, const crypto::hash &pruned_data_hash);
 
   blobdata get_block_hashing_blob(const block& b);
-  bool calculate_block_hash(const block& b, crypto::hash& res);
+  bool calculate_block_hash(const block& b, crypto::hash& res, const blobdata *blob = NULL);
   bool get_block_hash(const block& b, crypto::hash& res);
   crypto::hash get_block_hash(const block& b);
   bool get_block_longhash(const block& b, crypto::hash& res, uint64_t height);
   crypto::hash get_block_longhash(const block& b, uint64_t height);
+  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b, crypto::hash *block_hash);
   bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b);
+  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b, crypto::hash &block_hash);
   bool get_inputs_money_amount(const transaction& tx, uint64_t& money);
   uint64_t get_outs_money_amount(const transaction& tx);
   bool check_inputs_types_supported(const transaction& tx);

src/cryptonote_core/blockchain.cpp

@@ -4283,8 +4283,9 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
       for (unsigned int j = 0; j < batches; j++, ++blockidx)
       {
         block &block = blocks[blockidx];
+        crypto::hash block_hash;
 
-        if (!parse_and_validate_block_from_blob(it->block, block))
+        if (!parse_and_validate_block_from_blob(it->block, block, block_hash))
           return false;
 
         // check first block and skip all blocks if its not chained properly
@@ -4297,7 +4298,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
             return true;
           }
         }
-        if (have_block(get_block_hash(block)))
+        if (have_block(block_hash))
           blocks_exist = true;
 
         std::advance(it, 1);
@@ -4307,11 +4308,12 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
     for (unsigned i = 0; i < extra && !blocks_exist; i++, blockidx++)
     {
       block &block = blocks[blockidx];
+      crypto::hash block_hash;
 
-      if (!parse_and_validate_block_from_blob(it->block, block))
+      if (!parse_and_validate_block_from_blob(it->block, block, block_hash))
         return false;
 
-      if (have_block(get_block_hash(block)))
+      if (have_block(block_hash))
         blocks_exist = true;
 
       std::advance(it, 1);

src/cryptonote_core/cryptonote_core.cpp

@@ -1432,7 +1432,8 @@ namespace cryptonote
     block lb;
     if (!b)
     {
-      if(!parse_and_validate_block_from_blob(block_blob, lb))
+      crypto::hash block_hash;
+      if(!parse_and_validate_block_from_blob(block_blob, lb, block_hash))
       {
         LOG_PRINT_L1("Failed to parse and validate new block");
         bvc.m_verifivation_failed = true;

src/cryptonote_protocol/cryptonote_protocol_handler.inl

@@ -993,7 +993,8 @@ namespace cryptonote
         return 1;
       }
 
-      if(!parse_and_validate_block_from_blob(block_entry.block, b))
+      crypto::hash block_hash;
+      if(!parse_and_validate_block_from_blob(block_entry.block, b, block_hash))
       {
         LOG_ERROR_CCONTEXT("sent wrong block: failed to parse and validate block: "
           << epee::string_tools::buff_to_hex_nodelimer(block_entry.block) << ", dropping connection");
@@ -1012,7 +1013,6 @@ namespace cryptonote
       if (start_height == std::numeric_limits<uint64_t>::max())
         start_height = boost::get<txin_gen>(b.miner_tx.vin[0]).height;
 
-      const crypto::hash block_hash = get_block_hash(b);
       auto req_it = context.m_requested_objects.find(block_hash);
       if(req_it == context.m_requested_objects.end())
       {
@@ -1119,13 +1119,13 @@ namespace cryptonote
               << ", we need " << previous_height);
 
           block new_block;
-          if (!parse_and_validate_block_from_blob(blocks.back().block, new_block))
+          crypto::hash last_block_hash;
+          if (!parse_and_validate_block_from_blob(blocks.back().block, new_block, last_block_hash))
           {
             MERROR(context << "Failed to parse block, but it should already have been parsed");
             m_block_queue.remove_spans(span_connection_id, start_height);
             continue;
           }
-          const crypto::hash last_block_hash = cryptonote::get_block_hash(new_block);
           if (m_core.have_block(last_block_hash))
           {
             const uint64_t subchain_height = start_height + blocks.size();

src/wallet/wallet2.cpp

@@ -2238,9 +2238,7 @@ void wallet2::get_short_chain_history(std::list<crypto::hash>& ids, uint64_t gra
 //----------------------------------------------------------------------------------------------------
 void wallet2::parse_block_round(const cryptonote::blobdata &blob, cryptonote::block &bl, crypto::hash &bl_id, bool &error) const
 {
-  error = !cryptonote::parse_and_validate_block_from_blob(blob, bl);
+  error = !cryptonote::parse_and_validate_block_from_blob(blob, bl, bl_id);
-  if (!error)
-    bl_id = get_block_hash(bl);
 }
 //----------------------------------------------------------------------------------------------------
 void wallet2::pull_blocks(uint64_t start_height, uint64_t &blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::vector<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices)