Add blobs caching for faster mining and validation, sync speed is res…

…tored even got small boost comparing to CN

src/CryptoNoteCore/Blockchain.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2016, The CryptoNote developers, The Bytecoin developers, The Monero developers
 // Copyright (c) 2018, Ryo Currency Project
-// Copyright (c) 2016-2021, The Karbo developers
+// Copyright (c) 2016-2022, The Karbo developers
 //
 // This file is part of Karbo.
 //
@@ -64,7 +64,7 @@ bool operator<(const Crypto::KeyImage& keyImage1, const Crypto::KeyImage& keyIma
 }
 }
 
-#define CURRENT_BLOCKCACHE_STORAGE_ARCHIVE_VER 3
+#define CURRENT_BLOCKCACHE_STORAGE_ARCHIVE_VER 4
 #define CURRENT_BLOCKCHAININDICES_STORAGE_ARCHIVE_VER 1
 
 namespace CryptoNote {
@@ -227,6 +227,9 @@ class BlockCacheSerializer {
     logger(INFO) << operation << "multi-signature outputs...";
     s(m_bs.m_multisignatureOutputs, "multisig_outputs");
 
+    logger(INFO) << operation << "hashing blobs...";
+    s(m_bs.m_blobs, "hashing_blobs");
+
     auto dur = std::chrono::steady_clock::now() - start;
 
     logger(INFO) << "Serialization time: " << std::chrono::duration_cast<std::chrono::milliseconds>(dur).count() << "ms";
@@ -572,6 +575,7 @@ void Blockchain::rebuildCache() {
   m_spent_key_images.clear();
   m_outputs.clear();
   m_multisignatureOutputs.clear();
+  m_blobs.clear();
   for (uint32_t b = 0; b < m_blocks.size(); ++b) {
     if (b % 1000 == 0) {
       logger(INFO, BRIGHT_WHITE) << "Height " << b << " of " << m_blocks.size();
@@ -606,6 +610,15 @@ void Blockchain::rebuildCache() {
         }
       }
     }
+
+    // process blobs for fast mining
+    BinaryArray ba;
+    const Block& blk = m_blocks[b].bl;
+    if (!get_block_hashing_blob(blk, ba)) {
+      logger(ERROR, BRIGHT_RED) << "Failed to get_block_hashing_blob of block at height " << b;
+    }
+    m_blobs.push_back(ba);
+
   }
 
   std::chrono::duration<double> duration = std::chrono::steady_clock::now() - timePoint;
@@ -1202,6 +1215,12 @@ bool Blockchain::checkProofOfWork(Crypto::cn_context& context, const Block& bloc
   return true;
 }
 
+bool Blockchain::getHashingBlob(const uint32_t height, BinaryArray& blob) {
+  blob = m_blobs[height];
+
+  return true;
+}
+
 bool Blockchain::get_block_long_hash(Crypto::cn_context &context, const Block& b, Crypto::Hash& res) {
   if (b.majorVersion < CryptoNote::BLOCK_MAJOR_VERSION_5) {
     return get_block_longhash(context, b, res);
@@ -1235,16 +1254,7 @@ bool Blockchain::get_block_long_hash(Crypto::cn_context &context, const Block& b
                    (chunk[3]);
 
       uint32_t height_j = n % maxHeight;
-      std::lock_guard<decltype(m_blockchain_lock)> lk(m_blockchain_lock);
-      const Block& bj = m_blocks[height_j].bl;
-
-      BinaryArray ba;
-      if (!get_block_hashing_blob(bj, ba)) {
-        logger(ERROR, BRIGHT_RED) << "Failed to get_block_hashing_blob of additional block " 
-                                  << j << " at height " << height_j;
-        return false;
-      }
-
+      BinaryArray &ba = m_blobs[height_j];
       pot.insert(std::end(pot), std::begin(ba), std::end(ba));
     }
   }
@@ -2363,6 +2373,13 @@ bool Blockchain::pushBlock(BlockEntry& block, const Crypto::Hash& blockHash) {
   m_timestampIndex.add(block.bl.timestamp, blockHash);
   m_generatedTransactionsIndex.add(block.bl);
 
+  BinaryArray ba;
+  const Block& blk = block.bl;
+  if (!get_block_hashing_blob(blk, ba)) {
+      logger(ERROR, BRIGHT_RED) << "Failed to get_block_hashing_blob of block " << blockHash;
+  }
+  m_blobs.push_back(ba);
+
   assert(m_blockIndex.size() == m_blocks.size());
 
   return true;
@@ -2653,6 +2670,7 @@ void Blockchain::removeLastBlock() {
 
   m_blocks.pop_back();
   m_blockIndex.pop();
+  m_blobs.pop_back();
 
   assert(m_blockIndex.size() == m_blocks.size());
 }

src/CryptoNoteCore/Blockchain.h

@@ -1,5 +1,5 @@
 // Copyright (c) 2012-2016, The CryptoNote developers, The Bytecoin developers
-// Copyright (c) 2016-2021, The Karbo developers
+// Copyright (c) 2016-2022, The Karbo developers
 //
 // This file is part of Karbo.
 //
@@ -130,6 +130,8 @@ namespace CryptoNote {
     bool isBlockInMainChain(const Crypto::Hash& blockId);
     bool isInCheckpointZone(const uint32_t height);
 
+    bool getHashingBlob(const uint32_t height, BinaryArray& blob);
+
     template<class visitor_t> bool scanOutputKeysForIndexes(const KeyInput& tx_in_to_key, visitor_t& vis, uint32_t* pmax_related_block_height = NULL);
 
     bool addMessageQueue(MessageQueue<BlockchainMessage>& messageQueue);
@@ -262,6 +264,8 @@ namespace CryptoNote {
     typedef parallel_flat_hash_map<uint64_t, std::vector<std::pair<TransactionIndex, uint16_t>>> outputs_container; //Crypto::Hash - tx hash, size_t - index of out in transaction
     typedef parallel_flat_hash_map<uint64_t, std::vector<MultisignatureOutputUsage>> MultisignatureOutputsContainer;
 
+    typedef std::vector<BinaryArray> hashing_blobs_container;
+
     const Currency& m_currency;
     tx_memory_pool& m_tx_pool;
     std::recursive_mutex m_blockchain_lock; // TODO: add here reader/writer lock
@@ -280,14 +284,16 @@ namespace CryptoNote {
     typedef parallel_flat_hash_map<Crypto::Hash, uint32_t> BlockMap;
     typedef parallel_flat_hash_map<Crypto::Hash, TransactionIndex> TransactionMap;
     typedef BasicUpgradeDetector<Blocks> UpgradeDetector;
-
     friend class BlockCacheSerializer;
     friend class BlockchainIndicesSerializer;
 
     Blocks m_blocks;
     CryptoNote::BlockIndex m_blockIndex;
     TransactionMap m_transactionMap;
     MultisignatureOutputsContainer m_multisignatureOutputs;
+
+    hashing_blobs_container m_blobs;
+
     UpgradeDetector m_upgradeDetectorV2;
     UpgradeDetector m_upgradeDetectorV3;
     UpgradeDetector m_upgradeDetectorV4;