blockchain_and_pool: move to crytonote_core and enforce its usage

src/blockchain_utilities/blockchain_ancestry.cpp

@@ -37,11 +37,7 @@
 #include "common/command_line.h"
 #include "common/varint.h"
 #include "cryptonote_basic/cryptonote_boost_serialization.h"
-#include "cryptonote_core/tx_pool.h"
 #include "cryptonote_core/cryptonote_core.h"
-#include "cryptonote_core/blockchain.h"
-#include "blockchain_db/blockchain_db.h"
-#include "blockchain_and_pool.h"
 #include "version.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY

src/blockchain_utilities/blockchain_depth.cpp

@@ -31,11 +31,7 @@
 #include <boost/algorithm/string.hpp>
 #include "common/command_line.h"
 #include "common/varint.h"
-#include "cryptonote_core/tx_pool.h"
 #include "cryptonote_core/cryptonote_core.h"
-#include "cryptonote_core/blockchain.h"
-#include "blockchain_db/blockchain_db.h"
-#include "blockchain_and_pool.h"
 #include "version.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY

src/blockchain_utilities/blockchain_export.cpp

@@ -28,9 +28,7 @@
 
 #include "bootstrap_file.h"
 #include "blocksdat_file.h"
-#include "blockchain_and_pool.h"
 #include "common/command_line.h"
-#include "cryptonote_core/tx_pool.h"
 #include "cryptonote_core/cryptonote_core.h"
 #include "blockchain_db/blockchain_db.h"
 #include "version.h"

src/blockchain_utilities/blockchain_prune.cpp

@@ -33,11 +33,8 @@
 #include <boost/system/error_code.hpp>
 #include <boost/filesystem.hpp>
 #include "common/command_line.h"
-#include "blockchain_and_pool.h"
 #include "common/pruning.h"
 #include "cryptonote_core/cryptonote_core.h"
-#include "cryptonote_core/blockchain.h"
-#include "blockchain_db/blockchain_db.h"
 #include "blockchain_db/lmdb/db_lmdb.h"
 #include "version.h"
 

src/blockchain_utilities/blockchain_prune_known_spent_data.cpp

@@ -30,11 +30,7 @@
 #include <boost/filesystem.hpp>
 #include "common/command_line.h"
 #include "serialization/crypto.h"
-#include "cryptonote_core/tx_pool.h"
 #include "cryptonote_core/cryptonote_core.h"
-#include "cryptonote_core/blockchain.h"
-#include "blockchain_db/blockchain_db.h"
-#include "blockchain_and_pool.h"
 #include "version.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY

src/blockchain_utilities/blockchain_stats.cpp

@@ -31,10 +31,7 @@
 #include "common/command_line.h"
 #include "common/varint.h"
 #include "cryptonote_basic/cryptonote_boost_serialization.h"
-#include "blockchain_and_pool.h"
-#include "cryptonote_core/tx_pool.h"
 #include "cryptonote_core/cryptonote_core.h"
-#include "cryptonote_core/blockchain.h"
 #include "blockchain_db/blockchain_db.h"
 #include "version.h"
 

src/blockchain_utilities/blockchain_usage.cpp

@@ -31,11 +31,7 @@
 #include <boost/filesystem/path.hpp>
 #include "common/command_line.h"
 #include "common/varint.h"
-#include "cryptonote_core/tx_pool.h"
 #include "cryptonote_core/cryptonote_core.h"
-#include "cryptonote_core/blockchain.h"
-#include "blockchain_db/blockchain_db.h"
-#include "blockchain_and_pool.h"
 #include "version.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY

src/cryptonote_core/blockchain.h

@@ -112,13 +112,6 @@ namespace cryptonote
       uint64_t already_generated_coins; //!< the total coins minted after that block
     };
 
-    /**
-     * @brief Blockchain constructor
-     *
-     * @param tx_pool a reference to the transaction pool to be kept by the Blockchain
-     */
-    Blockchain(tx_memory_pool& tx_pool);
-
     /**
      * @brief Blockchain destructor
      */
@@ -1235,6 +1228,13 @@ namespace cryptonote
     // cache for verifying transaction RCT non semantics
     mutable rct_ver_cache_t m_rct_ver_cache;
 
+    /**
+     * @brief Blockchain constructor
+     *
+     * @param tx_pool a reference to the transaction pool to be kept by the Blockchain
+     */
+    Blockchain(tx_memory_pool& tx_pool);
+
     /**
      * @brief collects the keys for all outputs being "spent" as an input
      *
@@ -1608,5 +1608,7 @@ namespace cryptonote
      * @param already_generated_coins total coins mined by the network so far
      */
     void send_miner_notifications(uint64_t height, const crypto::hash &seed_hash, const crypto::hash &prev_id, uint64_t already_generated_coins);
+
+    friend class BlockchainAndPool;
   };
 }  // namespace cryptonote

src/cryptonote_core/blockchain_and_pool.h

@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2020, The Monero Project
+// Copyright (c) 2023, The Monero Project
 //
 // All rights reserved.
 //
@@ -33,12 +33,26 @@
 
 #pragma once
 
-#include "cryptonote_core/blockchain.h"
-#include "cryptonote_core/tx_pool.h"
+#include <memory>
 
-struct BlockchainAndPool {
-  cryptonote::Blockchain blockchain;
-  cryptonote::tx_memory_pool tx_pool;
+#include "blockchain.h"
+#include "tx_pool.h"
 
-  BlockchainAndPool() : blockchain(tx_pool), tx_pool(blockchain) {}
+namespace cryptonote
+{
+/**
+ * @brief Container for safely constructing Blockchain and tx_memory_pool classes
+ * 
+ * The reason for this class existing is that the constructors for both Blockchain and
+ * tx_memory_pool take a reference for tx_memory_pool and Blockchain, respectively. Because of this
+ * circular reference, it is annoying/unsafe to construct these normally. This class guarantees that
+ * we don't make any silly mistakes with pointers / dangling references.
+ */
+struct BlockchainAndPool
+{
+    Blockchain blockchain;
+    tx_memory_pool tx_pool;
+  
+    BlockchainAndPool(): blockchain(tx_pool), tx_pool(blockchain) {}
 };
+}

src/cryptonote_core/cryptonote_core.cpp

@@ -221,8 +221,9 @@ namespace cryptonote
 
   //-----------------------------------------------------------------------------------------------
   core::core(i_cryptonote_protocol* pprotocol):
-              m_mempool(m_blockchain_storage),
-              m_blockchain_storage(m_mempool),
+              m_bap(),
+              m_mempool(m_bap.tx_pool),
+              m_blockchain_storage(m_bap.blockchain),
               m_miner(this, [this](const cryptonote::block &b, uint64_t height, const crypto::hash *seed_hash, unsigned int threads, crypto::hash &hash) {
                 return cryptonote::get_block_longhash(&m_blockchain_storage, b, hash, height, seed_hash, threads);
               }),

src/cryptonote_core/cryptonote_core.h

@@ -42,8 +42,7 @@
 #include "cryptonote_protocol/enums.h"
 #include "common/download.h"
 #include "common/command_line.h"
-#include "tx_pool.h"
-#include "blockchain.h"
+#include "blockchain_and_pool.h"
 #include "cryptonote_basic/miner.h"
 #include "cryptonote_basic/connection_context.h"
 #include "warnings.h"
@@ -1098,8 +1097,9 @@ namespace cryptonote
 
      uint64_t m_test_drop_download_height = 0; //!< height under which to drop incoming blocks, if doing so
 
-     tx_memory_pool m_mempool; //!< transaction pool instance
-     Blockchain m_blockchain_storage; //!< Blockchain instance
+     BlockchainAndPool m_bap; //! Contains owned instances of Blockchain and tx_memory_pool
+     tx_memory_pool& m_mempool; //!< ref to transaction pool instance in m_bap
+     Blockchain& m_blockchain_storage; //!< ref to Blockchain instance in m_bap
 
      i_cryptonote_protocol* m_pprotocol; //!< cryptonote protocol instance
 

src/cryptonote_core/tx_pool.h

@@ -97,14 +97,6 @@ namespace cryptonote
   class tx_memory_pool: boost::noncopyable
   {
   public:
-    /**
-     * @brief Constructor
-     *
-     * @param bchs a Blockchain class instance, for getting chain info
-     */
-    tx_memory_pool(Blockchain& bchs);
-
-
     /**
      * @copydoc add_tx(transaction&, tx_verification_context&, bool, bool, uint8_t)
      *
@@ -488,6 +480,13 @@ namespace cryptonote
 
   private:
 
+    /**
+     * @brief Constructor
+     *
+     * @param bchs a Blockchain class instance, for getting chain info
+     */
+    tx_memory_pool(Blockchain& bchs);
+
     /**
      * @brief insert key images into m_spent_key_images
      *
@@ -676,6 +675,8 @@ private:
 
     //! Next timestamp that a DB check for relayable txes is allowed
     std::atomic<time_t> m_next_check;
+
+    friend class BlockchainAndPool;
   };
 }