diff options
| -rw-r--r-- | Doxyfile | 14 | ||||
| -rw-r--r-- | src/blockchain_db/blockchain_db.h | 1092 | ||||
| -rw-r--r-- | src/cryptonote_core/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | src/cryptonote_core/blockchain.cpp | 49 | ||||
| -rw-r--r-- | src/cryptonote_core/blockchain.h | 890 | ||||
| -rw-r--r-- | src/cryptonote_core/blockchain_storage.cpp | 8 | ||||
| -rw-r--r-- | src/cryptonote_core/checkpoints.cpp | 251 | ||||
| -rw-r--r-- | src/cryptonote_core/checkpoints.h | 181 | ||||
| -rw-r--r-- | src/cryptonote_core/checkpoints_create.cpp | 280 | ||||
| -rw-r--r-- | src/cryptonote_core/checkpoints_create.h | 48 | ||||
| -rw-r--r-- | src/cryptonote_core/cryptonote_core.cpp | 19 | ||||
| -rw-r--r-- | src/cryptonote_core/cryptonote_core.h | 650 | ||||
| -rw-r--r-- | src/cryptonote_core/difficulty.cpp | 6 | ||||
| -rw-r--r-- | src/cryptonote_core/difficulty.h | 12 | ||||
| -rw-r--r-- | src/daemon/core.h | 1 |
15 files changed, 2909 insertions, 594 deletions
@@ -409,13 +409,13 @@ LOOKUP_CACHE_SIZE = 0 # normally produced when WARNINGS is set to YES. # The default value is: NO. -EXTRACT_ALL = NO +EXTRACT_ALL = YES # If the EXTRACT_PRIVATE tag is set to YES all private members of a class will # be included in the documentation. # The default value is: NO. -EXTRACT_PRIVATE = NO +EXTRACT_PRIVATE = YES # If the EXTRACT_PACKAGE tag is set to YES all members with package or internal # scope will be included in the documentation. @@ -427,7 +427,7 @@ EXTRACT_PACKAGE = NO # included in the documentation. # The default value is: NO. -EXTRACT_STATIC = NO +EXTRACT_STATIC = YES # If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs) defined # locally in source files will be included in the documentation. If set to NO @@ -452,7 +452,7 @@ EXTRACT_LOCAL_METHODS = NO # are hidden. # The default value is: NO. -EXTRACT_ANON_NSPACES = NO +EXTRACT_ANON_NSPACES = YES # If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all # undocumented members inside documented classes or files. If set to NO these @@ -1902,7 +1902,7 @@ ENABLE_PREPROCESSING = YES # The default value is: NO. # This tag requires that the tag ENABLE_PREPROCESSING is set to YES. -MACRO_EXPANSION = NO +MACRO_EXPANSION = YES # If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then # the macro expansion is limited to the macros specified with the PREDEFINED and @@ -1910,7 +1910,7 @@ MACRO_EXPANSION = NO # The default value is: NO. # This tag requires that the tag ENABLE_PREPROCESSING is set to YES. -EXPAND_ONLY_PREDEF = NO +EXPAND_ONLY_PREDEF = YES # If the SEARCH_INCLUDES tag is set to YES the includes files in the # INCLUDE_PATH will be searched if a #include is found. @@ -1942,7 +1942,7 @@ INCLUDE_FILE_PATTERNS = # recursively expanded use the := operator instead of the = operator. # This tag requires that the tag ENABLE_PREPROCESSING is set to YES. -PREDEFINED = +PREDEFINED = "BLOCKCHAIN_DB=2" \ # DB_LMDB # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this # tag can be used to specify a list of macro names that should be expanded. The diff --git a/src/blockchain_db/blockchain_db.h b/src/blockchain_db/blockchain_db.h index 3396b8c20..3e0ca141e 100644 --- a/src/blockchain_db/blockchain_db.h +++ b/src/blockchain_db/blockchain_db.h @@ -38,18 +38,20 @@ #include "cryptonote_core/difficulty.h" #include "cryptonote_core/hardfork.h" -/* DB Driver Interface +/** \file + * Cryptonote Blockchain Database Interface * * The DB interface is a store for the canonical block chain. * It serves as a persistent storage for the blockchain. * - * For the sake of efficiency, the reference implementation will also + * For the sake of efficiency, a concrete implementation may also * store some blockchain data outside of the blocks, such as spent * transfer key images, unspent transaction outputs, etc. * + * Examples are as follows: + * * Transactions are duplicated so that we don't have to fetch a whole block - * in order to fetch a transaction from that block. If this is deemed - * unnecessary later, this can change. + * in order to fetch a transaction from that block. * * Spent key images are duplicated outside of the blocks so it is quick * to verify an output hasn't already been spent @@ -57,100 +59,34 @@ * Unspent transaction outputs are duplicated to quickly gather random * outputs to use for mixins * - * IMPORTANT: - * A concrete implementation of this interface should populate these - * duplicated members! It is possible to have a partial implementation - * of this interface call to private members of the interface to be added - * later that will then populate as needed. - * - * General: - * open() - * is_open() - * close() - * sync() - * reset() - * - * Lock and unlock provided for reorg externally, and for block - * additions internally, this way threaded reads are completely fine - * unless the blockchain is changing. - * bool lock() - * unlock() - * - * vector<str> get_filenames() - * - * Blocks: - * bool block_exists(hash) - * height add_block(block, block_size, cumulative_difficulty, coins_generated, transactions) - * block get_block(hash) - * height get_block_height(hash) - * header get_block_header(hash) - * block get_block_from_height(height) - * size_t get_block_size(height) - * difficulty get_block_cumulative_difficulty(height) - * uint64_t get_block_already_generated_coins(height) - * uint64_t get_block_timestamp(height) - * uint64_t get_top_block_timestamp() - * hash get_block_hash_from_height(height) - * blocks get_blocks_range(height1, height2) - * hashes get_hashes_range(height1, height2) - * hash top_block_hash() - * block get_top_block() - * height height() - * void pop_block(block&, tx_list&) - * - * Transactions: - * bool tx_exists(hash) - * uint64_t get_tx_unlock_time(hash) - * tx get_tx(hash) - * uint64_t get_tx_count() - * tx_list get_tx_list(hash_list) - * height get_tx_block_height(hash) - * - * Outputs: - * uint64_t get_num_outputs(amount) - * pub_key get_output_key(amount, index) - * hash,index get_output_tx_and_index_from_global(index) - * hash,index get_output_tx_and_index(amount, index) - * vec<uint64> get_tx_output_indices(tx_hash) - * - * - * Spent Output Key Images: - * bool has_key_image(key_image) - * - * Exceptions: - * DB_ERROR -- generic - * DB_OPEN_FAILURE - * DB_CREATE_FAILURE - * DB_SYNC_FAILURE - * BLOCK_DNE - * BLOCK_PARENT_DNE - * BLOCK_EXISTS - * BLOCK_INVALID -- considering making this multiple errors - * TX_DNE - * TX_EXISTS - * OUTPUT_DNE - * OUTPUT_EXISTS - * KEY_IMAGE_EXISTS */ namespace cryptonote { -// typedef for convenience +/** a pair of <transaction hash, output index>, typedef for convenience */ typedef std::pair<crypto::hash, uint64_t> tx_out_index; #pragma pack(push, 1) + +/** + * @brief a struct containing output metadata + */ struct output_data_t { - crypto::public_key pubkey; - uint64_t unlock_time; - uint64_t height; + crypto::public_key pubkey; //!< the output's public key (for spend verification) + uint64_t unlock_time; //!< the output's unlock time (or height) + uint64_t height; //!< the height of the block which created the output }; #pragma pack(pop) /*********************************** * Exception Definitions ***********************************/ + +/** + * @brief A base class for BlockchainDB exceptions + */ class DB_EXCEPTION : public std::exception { private: @@ -168,6 +104,9 @@ class DB_EXCEPTION : public std::exception } }; +/** + * @brief A generic BlockchainDB exception + */ class DB_ERROR : public DB_EXCEPTION { public: @@ -175,7 +114,9 @@ class DB_ERROR : public DB_EXCEPTION DB_ERROR(const char* s) : DB_EXCEPTION(s) { } }; -// For distinguishing errors trying to set up a DB txn from other errors +/** + * @brief thrown when there is an error starting a DB transaction + */ class DB_ERROR_TXN_START : public DB_EXCEPTION { public: @@ -183,6 +124,9 @@ class DB_ERROR_TXN_START : public DB_EXCEPTION DB_ERROR_TXN_START(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when opening the BlockchainDB fails + */ class DB_OPEN_FAILURE : public DB_EXCEPTION { public: @@ -190,6 +134,9 @@ class DB_OPEN_FAILURE : public DB_EXCEPTION DB_OPEN_FAILURE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when creating the BlockchainDB fails + */ class DB_CREATE_FAILURE : public DB_EXCEPTION { public: @@ -197,6 +144,9 @@ class DB_CREATE_FAILURE : public DB_EXCEPTION DB_CREATE_FAILURE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when synchronizing the BlockchainDB to disk fails + */ class DB_SYNC_FAILURE : public DB_EXCEPTION { public: @@ -204,6 +154,9 @@ class DB_SYNC_FAILURE : public DB_EXCEPTION DB_SYNC_FAILURE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a requested block does not exist + */ class BLOCK_DNE : public DB_EXCEPTION { public: @@ -211,6 +164,9 @@ class BLOCK_DNE : public DB_EXCEPTION BLOCK_DNE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a block's parent does not exist (and it needed to) + */ class BLOCK_PARENT_DNE : public DB_EXCEPTION { public: @@ -218,6 +174,9 @@ class BLOCK_PARENT_DNE : public DB_EXCEPTION BLOCK_PARENT_DNE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a block exists, but shouldn't, namely when adding a block + */ class BLOCK_EXISTS : public DB_EXCEPTION { public: @@ -225,6 +184,9 @@ class BLOCK_EXISTS : public DB_EXCEPTION BLOCK_EXISTS(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when something is wrong with the block to be added + */ class BLOCK_INVALID : public DB_EXCEPTION { public: @@ -232,6 +194,9 @@ class BLOCK_INVALID : public DB_EXCEPTION BLOCK_INVALID(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a requested transaction does not exist + */ class TX_DNE : public DB_EXCEPTION { public: @@ -239,6 +204,9 @@ class TX_DNE : public DB_EXCEPTION TX_DNE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a transaction exists, but shouldn't, namely when adding a block + */ class TX_EXISTS : public DB_EXCEPTION { public: @@ -246,6 +214,9 @@ class TX_EXISTS : public DB_EXCEPTION TX_EXISTS(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a requested output does not exist + */ class OUTPUT_DNE : public DB_EXCEPTION { public: @@ -253,6 +224,9 @@ class OUTPUT_DNE : public DB_EXCEPTION OUTPUT_DNE(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when an output exists, but shouldn't, namely when adding a block + */ class OUTPUT_EXISTS : public DB_EXCEPTION { public: @@ -260,6 +234,9 @@ class OUTPUT_EXISTS : public DB_EXCEPTION OUTPUT_EXISTS(const char* s) : DB_EXCEPTION(s) { } }; +/** + * @brief thrown when a spent key image exists, but shouldn't, namely when adding a block + */ class KEY_IMAGE_EXISTS : public DB_EXCEPTION { public: @@ -272,6 +249,18 @@ class KEY_IMAGE_EXISTS : public DB_EXCEPTION ***********************************/ +/** + * @brief The BlockchainDB backing store interface declaration/contract + * + * This class provides a uniform interface for using BlockchainDB to store + * a blockchain. Any implementation of this class will also implement all + * functions exposed here, so one can use this class without knowing what + * implementation is being used. Refer to each pure virtual function's + * documentation here when implementing a BlockchainDB subclass. + * + * A subclass which encounters an issue should report that issue by throwing + * a DB_EXCEPTION which adequately conveys the issue. + */ class BlockchainDB { private: @@ -279,7 +268,22 @@ private: * private virtual members *********************************************************************/ - // tells the subclass to add the block and metadata to storage + /** + * @brief add the block and metadata to the db + * + * The subclass implementing this will add the specified block and + * block metadata to its backing store. This does not include its + * transactions, those are added in a separate step. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param blk the block to be added + * @param block_size the size of the block (transactions and all) + * @param cumulative_difficulty the accumulated difficulty after this block + * @param coins_generated the number of coins generated total after this block + * @param blk_hash the hash of the block + */ virtual void add_block( const block& blk , const size_t& block_size , const difficulty_type& cumulative_difficulty @@ -287,84 +291,274 @@ private: , const crypto::hash& blk_hash ) = 0; - // tells the subclass to remove data about the top block + /** + * @brief remove data about the top block + * + * The subclass implementing this will remove the block data from the top + * block in the chain. The data to be removed is that which was added in + * BlockchainDB::add_block(const block& blk, const size_t& block_size, const difficulty_type& cumulative_difficulty, const uint64_t& coins_generated, const crypto::hash& blk_hash) + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + */ virtual void remove_block() = 0; - // tells the subclass to store the transaction and its metadata + /** + * @brief store the transaction and its metadata + * + * The subclass implementing this will add the specified transaction data + * to its backing store. This includes only the transaction blob itself + * and the other data passed here, not the separate outputs of the + * transaction. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param blk_hash the hash of the block containing the transaction + * @param tx the transaction to be added + * @param tx_hash the hash of the transaction + */ virtual void add_transaction_data(const crypto::hash& blk_hash, const transaction& tx, const crypto::hash& tx_hash) = 0; - // tells the subclass to remove data about a transaction + /** + * @brief remove data about a transaction + * + * The subclass implementing this will remove the transaction data + * for the passed transaction. The data to be removed was added in + * add_transaction_data(). Additionally, current subclasses have behavior + * which requires the transaction itself as a parameter here. Future + * implementations should note that this parameter is subject to be removed + * at a later time. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param tx_hash the hash of the transaction to be removed + * @param tx the transaction + */ virtual void remove_transaction_data(const crypto::hash& tx_hash, const transaction& tx) = 0; - // tells the subclass to store an output + /** + * @brief store an output + * + * The subclass implementing this will add the output data passed to its + * backing store in a suitable manner. In addition, the subclass is responsible + * for keeping track of the global output count in some manner, so that + * outputs may be indexed by the order in which they were created. In the + * future, this tracking (of the number, at least) should be moved to + * this class, as it is necessary and the same among all BlockchainDB. + * + * This data should be stored in such a manner that the only thing needed to + * reverse the process is the tx_out. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param tx_hash hash of the transaction the output was created by + * @param tx_output the output + * @param local_index index of the output in its transaction + * @param unlock_time unlock time/height of the output + */ virtual void add_output(const crypto::hash& tx_hash, const tx_out& tx_output, const uint64_t& local_index, const uint64_t unlock_time) = 0; - // tells the subclass to remove an output + /** + * @brief remove an output + * + * The subclass implementing this will remove all output data it stored + * in add_output(). + * + * In addition, the subclass is responsible for correctly decrementing + * its global output counter (this may be automatic for some, such as using + * a database backend "count" feature). + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param tx_output the output to be removed + */ virtual void remove_output(const tx_out& tx_output) = 0; - // tells the subclass to store a spent key + /** + * @brief store a spent key + * + * The subclass implementing this will store the spent key image. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param k_image the spent key image to store + */ virtual void add_spent_key(const crypto::key_image& k_image) = 0; - // tells the subclass to remove a spent key + /** + * @brief remove a spent key + * + * The subclass implementing this will remove the key image. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param k_image the spent key image to remove + */ virtual void remove_spent_key(const crypto::key_image& k_image) = 0; /********************************************************************* * private concrete members *********************************************************************/ - // private version of pop_block, for undoing if an add_block goes tits up + /** + * @brief private version of pop_block, for undoing if an add_block fails + * + * This function simply calls pop_block(block& blk, std::vector<transaction>& txs) + * with dummy parameters, as the returns-by-reference can be discarded. + */ void pop_block(); - // helper function for add_transactions, to add each individual tx + /** + * @brief helper function for add_transactions, to add each individual transaction + * + * This function is called by add_transactions() for each transaction to be + * added. + * + * @param blk_hash hash of the block which has the transaction + * @param tx the transaction to add + * @param tx_hash_ptr the hash of the transaction, if already calculated + */ void add_transaction(const crypto::hash& blk_hash, const transaction& tx, const crypto::hash* tx_hash_ptr = NULL); // helper function to remove transaction from blockchain + /** + * @brief helper function to remove transaction from the blockchain + * + * This function encapsulates aspects of removing a transaction. + * + * @param tx_hash the hash of the transaction to be removed + */ void remove_transaction(const crypto::hash& tx_hash); - uint64_t num_calls = 0; - uint64_t time_blk_hash = 0; - uint64_t time_add_block1 = 0; - uint64_t time_add_transaction = 0; + uint64_t num_calls = 0; //!< a performance metric + uint64_t time_blk_hash = 0; //!< a performance metric + uint64_t time_add_block1 = 0; //!< a performance metric + uint64_t time_add_transaction = 0; //!< a performance metric protected: - mutable uint64_t time_tx_exists = 0; - uint64_t time_commit1 = 0; - bool m_auto_remove_logs = true; + mutable uint64_t time_tx_exists = 0; //!< a performance metric + uint64_t time_commit1 = 0; //!< a performance metric + bool m_auto_remove_logs = true; //!< whether or not to automatically remove old logs HardFork* m_hardfork; public: - // virtual dtor + /** + * @brief An empty destructor. + */ virtual ~BlockchainDB() { }; - // reset profiling stats + /** + * @brief reset profiling stats + */ void reset_stats(); - // show profiling stats + /** + * @brief show profiling stats + * + * This function prints current performance/profiling data to whichever + * log file(s) are set up (possibly including stdout or stderr) + */ void show_stats(); - // open the db at location <filename>, or create it if there isn't one. + /** + * @brief open a db, or create it if necessary. + * + * This function opens an existing database or creates it if it + * does not exist. + * + * The subclass implementing this will handle all file opening/creation, + * and is responsible for maintaining its state. + * + * The parameter <filename> may not refer to a file name, necessarily, but + * could be an IP:PORT for a database which needs it, and so on. Calling it + * <filename> is convenient and should be descriptive enough, however. + * + * For now, db_flags are + * specific to the subclass being instantiated. This is subject to change, + * and the db_flags parameter may be deprecated. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param filename a string referring to the BlockchainDB to open + * @param db_flags flags relevant to how to open/use the BlockchainDB + */ virtual void open(const std::string& filename, const int db_flags = 0) = 0; - // returns true of the db is open/ready, else false + /** + * @brief Gets the current open/ready state of the BlockchainDB + * + * @return true if open/ready, otherwise false + */ bool is_open() const; - // close and sync the db + /** + * @brief close the BlockchainDB + * + * At minimum, this call ensures that further use of the BlockchainDB + * instance will not have effect. In any case where it is necessary + * to do so, a subclass implementing this will sync with disk. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + */ virtual void close() = 0; - // sync the db + /** + * @brief sync the BlockchainDB with disk + * + * This function should write any changes to whatever permanent backing + * store the subclass uses. Example: a BlockchainDB instance which + * keeps the whole blockchain in RAM won't need to regularly access a + * disk, but should write out its state when this is called. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + */ virtual void sync() = 0; - // reset the db -- USE WITH CARE + /** + * @brief Remove everything from the BlockchainDB + * + * This function should completely remove all data from a BlockchainDB. + * + * Use with caution! + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + */ virtual void reset() = 0; - // get all files used by this db (if any) + /** + * @brief get all files used by the BlockchainDB (if any) + * + * This function is largely for ease of automation, namely for unit tests. + * + * The subclass implementation should return all filenames it uses. + * + * @return a list of filenames + */ virtual std::vector<std::string> get_filenames() const = 0; // return the name of the folder the db's file(s) should reside in + /** + * @brief gets the name of the folder the BlockchainDB's file(s) should be in + * + * The subclass implementation should return the name of the folder in which + * it stores files, or an empty string if there is none. + * + * @return the name of the folder with the BlockchainDB's files, if any. + */ virtual std::string get_db_name() const = 0; @@ -372,13 +566,86 @@ public: // RAII-friendly and multi-read one-write friendly locking mechanism // // acquire db lock + /** + * @brief acquires the BlockchainDB lock + * + * This function is a stub until such a time as locking is implemented at + * this level. + * + * The subclass implementation should return true unless implementing a + * locking scheme of some sort, in which case it should return true upon + * acquisition of the lock and block until then. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @return true, unless at a future time false makes sense (timeout, etc) + */ virtual bool lock() = 0; // release db lock + /** + * @brief This function releases the BlockchainDB lock + * + * The subclass, should it have implemented lock(), will release any lock + * held by the calling thread. In the case of recursive locking, it should + * release one instance of a lock. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + */ virtual void unlock() = 0; + /** + * @brief tells the BlockchainDB to start a new "batch" of blocks + * + * If the subclass implements a batching method of caching blocks in RAM to + * be added to a backing store in groups, it should start a batch which will + * end either when <batch_num_blocks> has been added or batch_stop() has + * been called. In either case, it should end the batch and write to its + * backing store. + * + * If a batch is already in-progress, this function should throw a DB_ERROR. + * This exception may change in the future if it is deemed necessary to + * have a more granular exception type for this scenario. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param batch_num_blocks number of blocks to batch together + */ virtual void batch_start(uint64_t batch_num_blocks=0) = 0; + + /** + * @brief ends a batch transaction + * + * If the subclass implements batching, this function should store the + * batch it is currently on and mark it finished. + * + * If no batch is in-progress, this function should throw a DB_ERROR. + * This exception may change in the future if it is deemed necessary to + * have a more granular exception type for this scenario. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + */ virtual void batch_stop() = 0; + + /** + * @brief sets whether or not to batch transactions + * + * If the subclass implements batching, this function tells it to begin + * batching automatically. + * + * If the subclass implements batching and has a batch in-progress, a + * parameter of false should disable batching and call batch_stop() to + * store the current batch. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param bool batch whether or not to use batch transactions. + */ virtual void set_batch_transactions(bool) = 0; virtual void block_txn_start(bool readonly=false) = 0; @@ -388,8 +655,26 @@ public: virtual void set_hard_fork(HardFork* hf); // adds a block with the given metadata to the top of the blockchain, returns the new height - // NOTE: subclass implementations of this (or the functions it calls) need - // to handle undoing any partially-added blocks in the event of a failure. + /** + * @brief handles the addition of a new block to BlockchainDB + * + * This function organizes block addition and calls various functions as + * necessary. + * + * NOTE: subclass implementations of this (or the functions it calls) need + * to handle undoing any partially-added blocks in the event of a failure. + * + * If any of this cannot be done, the subclass should throw the corresponding + * subclass of DB_EXCEPTION + * + * @param blk the block to be added + * @param block_size the size of the block (transactions and all) + * @param cumulative_difficulty the accumulated difficulty after this block + * @param coins_generated the number of coins generated total after this block + * @param txs the transactions in the block + * + * @return the height of the chain post-addition + */ virtual uint64_t add_block( const block& blk , const size_t& block_size , const difficulty_type& cumulative_difficulty @@ -397,142 +682,639 @@ public: , const std::vector<transaction>& txs ); - // return true if a block with hash <h> exists in the blockchain + /** + * @brief checks if a block exists + * + * @param h the hash of the requested block + * + * @return true of the block exists, otherwise false + */ virtual bool block_exists(const crypto::hash& h) const = 0; - // return block with hash <h> + /** + * @brief fetches the block with the given hash + * + * The subclass should return 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 + */ virtual block get_block(const crypto::hash& h) const = 0; - // return the height of the block with hash <h> on the blockchain, - // throw if it doesn't exist + /** + * @brief gets the height of the block with a given hash + * + * The subclass should return the requested height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param h the hash to look for + * + * @return the height + */ virtual uint64_t get_block_height(const crypto::hash& h) const = 0; - // return header for block with hash <h> + /** + * @brief fetch a block header + * + * The subclass should return the block header from the block with + * the given hash. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param h the hash to look for + * + * @return the block header + */ virtual block_header get_block_header(const crypto::hash& h) const = 0; - // return block at height <height> + /** + * @brief fetch a block by height + * + * The subclass should return the block at the given 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; - // return timestamp of block at height <height> + /** + * @brief fetch a block's timestamp + * + * The subclass should return the timestamp of the block with the + * given height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param height the height requested + * + * @return the timestamp + */ virtual uint64_t get_block_timestamp(const uint64_t& height) const = 0; - // return timestamp of most recent block + /** + * @brief fetch the top block's timestamp + * + * The subclass should return the timestamp of the most recent block. + * + * @return the top block's timestamp + */ virtual uint64_t get_top_block_timestamp() const = 0; - // return block size of block at height <height> + /** + * @brief fetch a block's size + * + * The subclass should return the size of the block with the + * given height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param height the height requested + * + * @return the size + */ virtual size_t get_block_size(const uint64_t& height) const = 0; - // return cumulative difficulty up to and including block at height <height> + /** + * @brief fetch a block's cumulative difficulty + * + * The subclass should return the cumulative difficulty of the block with the + * given height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param height the height requested + * + * @return the cumulative difficulty + */ virtual difficulty_type get_block_cumulative_difficulty(const uint64_t& height) const = 0; - // return difficulty of block at height <height> + /** + * @brief fetch a block's difficulty + * + * The subclass should return the difficulty of the block with the + * given height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param height the height requested + * + * @return the difficulty + */ virtual difficulty_type get_block_difficulty(const uint64_t& height) const = 0; - // return number of coins generated up to and including block at height <height> + /** + * @brief fetch a block's already generated coins + * + * The subclass should return the total coins generated as of the block + * with the given height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param height the height requested + * + * @return the already generated coins + */ virtual uint64_t get_block_already_generated_coins(const uint64_t& height) const = 0; - // return hash of block at height <height> + /** + * @brief fetch a block's hash + * + * The subclass should return hash of the block with the + * given height. + * + * If the block does not exist, the subclass should throw BLOCK_DNE + * + * @param height the height requested + * + * @return the hash + */ virtual crypto::hash get_block_hash_from_height(const uint64_t& height) const = 0; - // return vector of blocks in range <h1,h2> of height (inclusively) + /** + * @brief fetch a list of blocks + * + * The subclass should return a vector of blocks with heights starting at + * h1 and ending at h2, inclusively. + * + * If the height range requested goes past the end of the blockchain, + * the subclass should throw BLOCK_DNE. (current implementations simply + * don't catch this exception as thrown by methods called within) + * + * @param h1 the start height + * @param h2 the end height + * + * @return a vector of blocks + */ virtual std::vector<block> get_blocks_range(const uint64_t& h1, const uint64_t& h2) const = 0; - // return vector of block hashes in range <h1, h2> of height (inclusively) + /** + * @brief fetch a list of block hashes + * + * The subclass should return a vector of block hashes from blocks with + * heights starting at h1 and ending at h2, inclusively. + * + * If the height range requested goes past the end of the blockchain, + * the subclass should throw BLOCK_DNE. (current implementations simply + * don't catch this exception as thrown by methods called within) + * + * @param h1 the start height + * @param h2 the end height + * + * @return a vector of block hashes + */ virtual std::vector<crypto::hash> get_hashes_range(const uint64_t& h1, const uint64_t& h2) const = 0; - // return the hash of the top block on the chain + /** + * @brief fetch the top block's hash + * + * The subclass should return the hash of the most recent block + * + * @return the top block's hash + */ virtual crypto::hash top_block_hash() const = 0; - // return the block at the top of the blockchain + /** + * @brief fetch the top block + * + * The subclass should return most recent block + * + * @return the top block + */ virtual block get_top_block() const = 0; - // return the height of the chain + /** + * @brief fetch the current blockchain height + * + * The subclass should return the current blockchain height + * + * @return the current blockchain height + */ virtual uint64_t height() const = 0; - // pops the top block off the blockchain. - // Returns by reference the popped block and its associated transactions - // - // IMPORTANT: - // When a block is popped, the transactions associated with it need to be - // removed, as well as outputs and spent key images associated with - // those transactions. + + /** + * <!-- + * TODO: Rewrite (if necessary) such that all calls to remove_* are + * done in concrete members of this base class. + * --> + * + * @brief pops the top block off the blockchain + * + * The subclass should remove the most recent block from the blockchain, + * along with all transactions, outputs, and other metadata created as + * a result of its addition to the blockchain. Most of this is handled + * by the concrete members of the base class provided the subclass correctly + * implements remove_* functions. + * + * The subclass should return by reference the popped block and + * its associated transactions + * + * @param blk return-by-reference the block which was popped + * @param txs return-by-reference the transactions from the popped block + */ virtual void pop_block(block& blk, std::vector<transaction>& txs); - // return true if a transaction with hash <h> exists + /** + * @brief check if a transaction with a given hash exists + * + * The subclass should check if a transaction is stored which has the + * given hash and return true if so, false otherwise. + * + * @param h the hash to check against + * + * @return true if the transaction exists, otherwise false + */ virtual bool tx_exists(const crypto::hash& h) const = 0; // return unlock time of tx with hash <h> + /** + * @brief fetch a transaction's unlock time/height + * + * The subclass should return the stored unlock time for the transaction + * with the given hash. + * + * If no such transaction exists, the subclass should throw TX_DNE. + * + * @param h the hash of the requested transaction + * + * @return the unlock time/height + */ virtual uint64_t get_tx_unlock_time(const crypto::hash& h) const = 0; // return tx with hash <h> // throw if no such tx exists + /** + * @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; - // returns the total number of transactions in all blocks + /** + * @brief fetches the total number of transactions ever + * + * The subclass should return a count of all the transactions from + * all blocks. + * + * @return the number of transactions in the blockchain + */ virtual uint64_t get_tx_count() const = 0; - // return list of tx with hashes <hlist>. - // TODO: decide if a missing hash means return empty list - // or just skip that hash + /** + * @brief fetches a list of transactions based on their hashes + * + * The subclass should attempt to fetch each transaction referred to by + * the hashes passed. + * + * Currently, if any of the transactions is not in BlockchainDB, the call + * to get_tx in the implementation will throw TX_DNE. + * + * <!-- TODO: decide if this behavior is correct for missing transactions --> + * + * @param hlist a list of hashes + * + * @return the list of transactions + */ virtual std::vector<transaction> get_tx_list(const std::vector<crypto::hash>& hlist) const = 0; // returns height of block that contains transaction with hash <h> + /** + * @brief fetches the height of a transaction's block + * + * The subclass should attempt to return the height of the block containing + * the transaction with the given hash. + * + * If the transaction cannot be found, the subclass should throw TX_DNE. + * + * @param h the hash of the transaction + * + * @return the height of the transaction's block + */ virtual uint64_t get_tx_block_height(const crypto::hash& h) const = 0; // returns the total number of outputs of amount <amount> + /** + * @brief fetches the number of outputs of a given amount + * + * The subclass should return a count of outputs of the given amount, + * or zero if there are none. + * + * <!-- TODO: should outputs spent with a low mixin (especially 0) be + * excluded from the count? --> + * + * @param amount the output amount being looked up + * + * @return the number of outputs of the given amount + */ virtual uint64_t get_num_outputs(const uint64_t& amount) const = 0; - // return index of the first element (should be hidden, but isn't) + /** + * @brief return index of the first element (should be hidden, but isn't) + * + * @return the index + */ virtual uint64_t get_indexing_base() const { return 0; } - // return public key for output with global output amount <amount> and index <index> + /** + * @brief get some of an output's data + * + * The subclass should return the public key, unlock time, and block height + * for the output with the given amount and index, collected in a struct. + * + * If the output cannot be found, the subclass should throw OUTPUT_DNE. + * + * If any of these parts cannot be found, but some are, the subclass + * should throw DB_ERROR with a message stating as much. + * + * @param amount the output amount + * @param index the output's index (indexed by amount) + * + * @return the requested output data + */ virtual output_data_t get_output_key(const uint64_t& amount, const uint64_t& index) = 0; + + /** + * @brief get some of an output's data + * + * The subclass should return the public key, unlock time, and block height + * for the output with the given global index, collected in a struct. + * + * If the output cannot be found, the subclass should throw OUTPUT_DNE. + * + * If any of these parts cannot be found, but some are, the subclass + * should throw DB_ERROR with a message stating as much. + * + * @param global_index the output's index (global) + * + * @return the requested output data + */ virtual output_data_t get_output_key(const uint64_t& global_index) const = 0; - // returns the tx hash associated with an output, referenced by global output index + /** + * @brief gets an output's tx hash and index + * + * The subclass should return the hash of the transaction which created the + * output with the global index given, as well as its index in that transaction. + * + * @param index an output's global index + * + * @return the tx hash and output index + */ virtual tx_out_index get_output_tx_and_index_from_global(const uint64_t& index) const = 0; - // returns the transaction-local reference for the output with <amount> at <index> - // return type is pair of tx hash and index + /** + * @brief gets an output's tx hash and index + * + * The subclass should return the hash of the transaction which created the + * output with the amount and index given, as well as its index in that + * transaction. + * + * @param amount an output amount + * @param index an output's amount-specific index + * + * @return the tx hash and output index + */ virtual tx_out_index get_output_tx_and_index(const uint64_t& amount, const uint64_t& index) = 0; + + /** + * @brief gets some outputs' tx hashes and indices + * + * This function is a mirror of + * get_output_tx_and_index(const uint64_t& amount, const uint64_t& index), + * but for a list of outputs rather than just one. + * + * @param amount an output amount + * @param offsets a list of amount-specific output indices + * @param indices return-by-reference a list of tx hashes and output indices (as pairs) + */ virtual void get_output_tx_and_index(const uint64_t& amount, const std::vector<uint64_t> &offsets, std::vector<tx_out_index> &indices) = 0; - virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs) = 0; + /** + * @brief gets outputs' data + * + * This function is a mirror of + * get_output_data(const uint64_t& amount, const uint64_t& index) + * but for a list of outputs rather than just one. + * + * @param amount an output amount + * @param offsets a list of amount-specific output indices + * @param outputs return-by-reference a list of outputs' metadata + */ + virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs) = 0; + + /* + * FIXME: Need to check with git blame and ask what this does to + * document it + */ virtual bool can_thread_bulk_indices() const = 0; - // return a vector of indices corresponding to the global output index for - // each output in the transaction with hash <h> + /** + * @brief gets output indices (global) for a transaction's outputs + * + * The subclass should fetch the global output indices for each output + * in the transaction with the given hash. + * + * If the transaction does not exist, the subclass should throw TX_DNE. + * + * If an output cannot be found, the subclass should throw OUTPUT_DNE. + * + * @param h a transaction hash + * + * @return a list of global output indices + */ virtual std::vector<uint64_t> get_tx_output_indices(const crypto::hash& h) const = 0; - // return a vector of indices corresponding to the amount output index for - // each output in the transaction with hash <h> + + /** + * @brief gets output indices (amount-specific) for a transaction's outputs + * + * The subclass should fetch the amount-specific output indices for each + * output in the transaction with the given hash. + * + * If the transaction does not exist, the subclass should throw TX_DNE. + * + * If an output cannot be found, the subclass should throw OUTPUT_DNE. + * + * @param h a transaction hash + * + * @return a list of amount-specific output indices + */ virtual std::vector<uint64_t> get_tx_amount_output_indices(const crypto::hash& h) const = 0; - // returns true if key image <img> is present in spent key images storage + /** + * @brief check if a key image is stored as spent + * + * @param img the key image to check for + * + * @return true if the image is present, otherwise false + */ virtual bool has_key_image(const crypto::key_image& img) const = 0; + /** + * @brief runs a function over all key images stored + * + * The subclass should run the passed function for each key image it has + * stored, passing the key image as its parameter. + * + * If any call to the function returns false, the subclass should return + * false. Otherwise, the subclass returns true. + * + * @param std::function fn the function to run + * + * @return false if the function returns false for any key image, otherwise true + */ virtual bool for_all_key_images(std::function<bool(const crypto::key_image&)>) const = 0; + + /** + * @brief runs a function over all blocks stored + * + * The subclass should run the passed function for each block it has + * stored, passing (block_height, block_hash, block) as its parameters. + * + * If any call to the function returns false, the subclass should return + * false. Otherwise, the subclass returns true. + * + * The subclass should throw DB_ERROR if any of the expected values are + * not found. Current implementations simply return false. + * + * @param std::function fn the function to run + * + * @return false if the function returns false for any block, otherwise true + */ virtual bool for_all_blocks(std::function<bool(uint64_t, const crypto::hash&, const cryptonote::block&)>) const = 0; + + /** + * @brief runs a function over all transactions stored + * + * The subclass should run the passed function for each transaction it has + * stored, passing (transaction_hash, transaction) as its parameters. + * + * If any call to the function returns false, the subclass should return + * false. Otherwise, the subclass returns true. + * + * The subclass should throw DB_ERROR if any of the expected values are + * not found. Current implementations simply return false. + * + * @param std::function fn the function to run + * + * @return false if the function returns false for any transaction, otherwise true + */ virtual bool for_all_transactions(std::function<bool(const crypto::hash&, const cryptonote::transaction&)>) const = 0; + + /** + * @brief runs a function over all outputs stored + * + * The subclass should run the passed function for each output it has + * stored, passing (amount, transaction_hash, tx_local_output_index) + * as its parameters. + * + * If any call to the function returns false, the subclass should return + * false. Otherwise, the subclass returns true. + * + * The subclass should throw DB_ERROR if any of the expected values are + * not found. Current implementations simply return false. + * + * @param std::function f the function to run + * + * @return false if the function returns false for any output, otherwise true + */ virtual bool for_all_outputs(std::function<bool(uint64_t amount, const crypto::hash &tx_hash, size_t tx_idx)> f) const = 0; + + // // Hard fork related storage + // + + // FIXME: verify that this is all correct + // - TW + /** + * @brief sets the height at which a hard fork has been voted to happen + * + * + * @param version the version voted to fork to + * @param height the height of the first block on the new fork + */ virtual void set_hard_fork_starting_height(uint8_t version, uint64_t height) = 0; + + /** + * @brief gets the height at which a hard fork has been voted to happen + * + * @param version the version to check + * + * @return the height at which the hard fork was accepted, if it has been, + * otherwise max(uint64_t) + */ virtual uint64_t get_hard_fork_starting_height(uint8_t version) const = 0; + + /** + * @brief sets which hardfork version a height is on + * + * @param height the height + * @param version the version + */ virtual void set_hard_fork_version(uint64_t height, uint8_t version) = 0; + + /** + * @brief checks which hardfork version a height is on + * + * @param height the height + * + * @return the version + */ virtual uint8_t get_hard_fork_version(uint64_t height) const = 0; + + /** + * @brief verify hard fork info in database + */ virtual void check_hard_fork_info() = 0; + + /** + * @brief delete hard fork info from database + */ virtual void drop_hard_fork_info() = 0; + /** + * @brief is BlockchainDB in read-only mode? + * + * @return true if in read-only mode, otherwise false + */ virtual bool is_read_only() const = 0; - // fix up anything that may be wrong due to past bugs + // TODO: this should perhaps be (or call) a series of functions which + // progressively update through version updates + /** + * @brief fix up anything that may be wrong due to past bugs + */ virtual void fixup(); + /** + * @brief set whether or not to automatically remove logs + * + * This function is only relevant for one implementation (BlockchainBDB), but + * is here to keep BlockchainDB users implementation-agnostic. + * + * @param auto_remove whether or not to auto-remove logs + */ void set_auto_remove_logs(bool auto_remove) { m_auto_remove_logs = auto_remove; } - bool m_open; - mutable epee::critical_section m_synchronization_lock; + bool m_open; //!< Whether or not the BlockchainDB is open/ready for use + mutable epee::critical_section m_synchronization_lock; //!< A lock, currently for when BlockchainLMDB needs to resize the backing db file + }; // class BlockchainDB diff --git a/src/cryptonote_core/CMakeLists.txt b/src/cryptonote_core/CMakeLists.txt index 88eea1d7e..205356797 100644 --- a/src/cryptonote_core/CMakeLists.txt +++ b/src/cryptonote_core/CMakeLists.txt @@ -31,7 +31,6 @@ set(cryptonote_core_sources blockchain_storage.cpp blockchain.cpp checkpoints.cpp - checkpoints_create.cpp cryptonote_basic_impl.cpp cryptonote_core.cpp cryptonote_format_utils.cpp @@ -49,7 +48,6 @@ set(cryptonote_core_private_headers blockchain_storage_boost_serialization.h blockchain.h checkpoints.h - checkpoints_create.h connection_context.h cryptonote_basic.h cryptonote_basic_impl.h diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp index 131f56a4d..2f42e1db5 100644 --- a/src/cryptonote_core/blockchain.cpp +++ b/src/cryptonote_core/blockchain.cpp @@ -49,7 +49,7 @@ #include "common/boost_serialization_helper.h" #include "warnings.h" #include "crypto/hash.h" -#include "cryptonote_core/checkpoints_create.h" +#include "cryptonote_core/checkpoints.h" #include "cryptonote_core/cryptonote_core.h" #if defined(PER_BLOCK_CHECKPOINT) #include "blocks/blocks.h" @@ -840,7 +840,7 @@ bool Blockchain::switch_to_alternative_blockchain(std::list<blocks_ext_by_hash:: } } - //removing alt_chain entries from alternative chain + //removing alt_chain entries from alternative chains container for (auto ch_ent: alt_chain) { m_alternative_chains.erase(ch_ent); @@ -991,8 +991,7 @@ bool Blockchain::validate_miner_transaction(const block& b, size_t cumulative_bl return true; } //------------------------------------------------------------------ -// get the block sizes of the last <count> blocks, starting at <from_height> -// and return by reference <sz>. +// get the block sizes of the last <count> blocks, and return by reference <sz>. void Blockchain::get_last_n_blocks_sizes(std::vector<size_t>& sz, size_t count) const { LOG_PRINT_L3("Blockchain::" << __func__); @@ -1408,6 +1407,10 @@ bool Blockchain::get_blocks(uint64_t start_offset, size_t count, std::list<block //TODO: This function *looks* like it won't need to be rewritten // to use BlockchainDB, as it calls other functions that were, // but it warrants some looking into later. +// +//FIXME: This function appears to want to return false if any transactions +// that belong with blocks are missing, but not if blocks themselves +// are missing. bool Blockchain::handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NOTIFY_RESPONSE_GET_OBJECTS::request& rsp) { LOG_PRINT_L3("Blockchain::" << __func__); @@ -1421,6 +1424,9 @@ bool Blockchain::handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NO { std::list<crypto::hash> missed_tx_ids; std::list<transaction> 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); if (missed_tx_ids.size() != 0) @@ -1668,6 +1674,8 @@ uint64_t Blockchain::block_difficulty(uint64_t i) const return 0; } //------------------------------------------------------------------ +//TODO: return type should be void, throw on exception +// alternatively, return true only if no blocks missed template<class t_ids_container, class t_blocks_container, class t_missed_container> bool Blockchain::get_blocks(const t_ids_container& block_ids, t_blocks_container& blocks, t_missed_container& missed_bs) const { @@ -1692,6 +1700,8 @@ bool Blockchain::get_blocks(const t_ids_container& block_ids, t_blocks_container return true; } //------------------------------------------------------------------ +//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 { @@ -1708,7 +1718,6 @@ bool Blockchain::get_transactions(const t_ids_container& txs_ids, t_tx_container { missed_txs.push_back(tx_hash); } - //FIXME: is this the correct way to handle this? catch (const std::exception& e) { return false; @@ -1965,6 +1974,11 @@ bool Blockchain::get_tx_outputs_gindexs(const crypto::hash& tx_id, std::vector<u return true; } //------------------------------------------------------------------ +//FIXME: it seems this function is meant to be merely a wrapper around +// another function of the same name, this one adding one bit of +// functionality. Should probably move anything more than that +// (getting the hash of the block at height max_used_block_id) +// to the other function to keep everything in one place. // This function overloads its sister function with // an extra value (hash of highest block that holds an output used as input) // as a return-by-reference. @@ -1975,6 +1989,7 @@ bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t& max_used_block #if defined(PER_BLOCK_CHECKPOINT) // check if we're doing per-block checkpointing + // FIXME: investigate why this block returns if (m_db->height() < m_blocks_hash_check.size() && kept_by_block) { TIME_MEASURE_START(a); @@ -2038,6 +2053,10 @@ bool Blockchain::have_tx_keyimges_as_spent(const transaction &tx) const } //------------------------------------------------------------------ // This function validates transaction inputs and their keys. +// FIXME: consider moving functionality specific to one input into +// check_tx_input() rather than here, and use this function simply +// to iterate the inputs as necessary (splitting the task +// using threads, etc.) bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t* pmax_used_block_height) { LOG_PRINT_L3("Blockchain::" << __func__); @@ -2320,7 +2339,7 @@ bool Blockchain::check_tx_input(const txin_to_key& txin, const crypto::hash& tx_ output_keys.clear(); - //check ring signature + // collect output keys outputs_visitor vi(output_keys, *this); if (!scan_outputkeys_for_indexes(txin, vi, tx_prefix_hash, pmax_related_block_height)) { @@ -2617,6 +2636,11 @@ leave: txs.push_back(tx); TIME_MEASURE_START(dd); + // FIXME: the storage should not be responsible for validation. + // If it does any, it is merely a sanity check. + // Validation is the purview of the Blockchain class + // - TW + // // ND: this is not needed, db->add_block() checks for duplicate k_images and fails accordingly. // if (!check_for_double_spend(tx, keys)) // { @@ -2797,6 +2821,8 @@ bool Blockchain::add_new_block(const block& bl_, block_verification_context& bvc return handle_block_to_main_chain(bl, id, bvc); } //------------------------------------------------------------------ +//TODO: Refactor, consider returning a failure height and letting +// caller decide course of action. void Blockchain::check_against_checkpoints(const checkpoints& points, bool enforce) { const auto& pts = points.get_points(); @@ -2834,16 +2860,16 @@ void Blockchain::check_against_checkpoints(const checkpoints& points, bool enfor // with an existing checkpoint. bool Blockchain::update_checkpoints(const std::string& file_path, bool check_dns) { - if (!cryptonote::load_checkpoints_from_json(m_checkpoints, file_path)) + if (!m_checkpoints.load_checkpoints_from_json(file_path)) { - return false; + return false; } // if we're checking both dns and json, load checkpoints from dns. // if we're not hard-enforcing dns checkpoints, handle accordingly if (m_enforce_dns_checkpoints && check_dns) { - if (!cryptonote::load_checkpoints_from_dns(m_checkpoints)) + if (!m_checkpoints.load_checkpoints_from_dns()) { return false; } @@ -2851,7 +2877,7 @@ bool Blockchain::update_checkpoints(const std::string& file_path, bool check_dns else if (check_dns) { checkpoints dns_points; - cryptonote::load_checkpoints_from_dns(dns_points); + dns_points.load_checkpoints_from_dns(); if (m_checkpoints.check_for_conflicts(dns_points)) { check_against_checkpoints(dns_points, false); @@ -2878,6 +2904,8 @@ void Blockchain::block_longhash_worker(const uint64_t height, const std::vector< TIME_MEASURE_START(t); slow_hash_allocate_state(); + //FIXME: height should be changing here, as get_block_longhash expects + // the height of the block passed to it for (const auto & block : blocks) { crypto::hash id = get_block_hash(block); @@ -2933,6 +2961,7 @@ bool Blockchain::cleanup_handle_incoming_blocks(bool force_sync) } //------------------------------------------------------------------ +//FIXME: unused parameter txs void Blockchain::output_scan_worker(const uint64_t amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs, std::unordered_map<crypto::hash, cryptonote::transaction> &txs) const { try diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h index ab2c8f9e8..94def1aa9 100644 --- a/src/cryptonote_core/blockchain.h +++ b/src/cryptonote_core/blockchain.h @@ -60,11 +60,14 @@ namespace cryptonote class tx_memory_pool; struct test_options; + /** Declares ways in which the BlockchainDB backend should be told to sync + * + */ enum blockchain_db_sync_mode { - db_sync, - db_async, - db_nosync + db_sync, //!< handle syncing calls instead of the backing db, synchronously + db_async, //!< handle syncing calls instead of the backing db, asynchronously + db_nosync //!< Leave syncing up to the backing db (safest, but slowest because of disk I/O) }; /************************************************************************/ @@ -73,6 +76,9 @@ namespace cryptonote class Blockchain { public: + /** + * @brief Now-defunct (TODO: remove) struct from in-memory blockchain + */ struct transaction_chain_entry { transaction tx; @@ -81,127 +87,697 @@ namespace cryptonote std::vector<uint64_t> m_global_output_indexes; }; + /** + * @brief container for passing a block and metadata about it on the blockchain + */ struct block_extended_info { - block bl; - uint64_t height; - size_t block_cumulative_size; - difficulty_type cumulative_difficulty; - uint64_t already_generated_coins; + block bl; //!< the block + uint64_t height; //!< the height of the block in the blockchain + size_t block_cumulative_size; //!< the size (in bytes) of the block + difficulty_type cumulative_difficulty; //!< the accumulated difficulty after that block + 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 Initialize the Blockchain state + * + * @param db a pointer to the backing store to use for the blockchain + * @param testnet true if on testnet, else false + * @param test_options test parameters + * + * @return true on success, false if any initialization steps fail + */ bool init(BlockchainDB* db, const bool testnet = false, const cryptonote::test_options *test_options = NULL); + + /** + * @brief Initialize the Blockchain state + * + * @param db a pointer to the backing store to use for the blockchain + * @param hf a structure containing hardfork information + * @param testnet true if on testnet, else false + * + * @return true on success, false if any initialization steps fail + */ bool init(BlockchainDB* db, HardFork*& hf, const bool testnet = false); + + /** + * @brief Uninitializes the blockchain state + * + * Saves to disk any state that needs to be maintained + * + * @return true on success, false if any uninitialization steps fail + */ bool deinit(); + /** + * @brief assign a set of blockchain checkpoint hashes + * + * @param chk_pts the set of checkpoints to assign + */ void set_checkpoints(checkpoints&& chk_pts) { m_checkpoints = chk_pts; } - //bool push_new_block(); + /** + * @brief get blocks and transactions from blocks based on start height and count + * + * @param start_offset the height on the blockchain to start at + * @param count the number of blocks to get, if there are as many after start_offset + * @param blocks return-by-reference container to put result blocks in + * @param txs return-by-reference container to put result transactions in + * + * @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; + + /** + * @brief get blocks from blocks based on start height and count + * + * @param start_offset the height on the blockchain to start at + * @param count the number of blocks to get, if there are as many after start_offset + * @param blocks return-by-reference container to put result blocks in + * + * @return false if start_offset > blockchain height, else true + */ bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const; + + /** + * @brief compiles a list of all blocks stored as alternative chains + * + * @param blocks return-by-reference container to put result blocks in + * + * @return true + */ bool get_alternative_blocks(std::list<block>& blocks) const; + + /** + * @brief returns the number of alternative blocks stored + * + * @return the number of alternative blocks stored + */ size_t get_alternative_blocks_count() const; + + /** + * @brief gets a block's hash given a height + * + * @param height the height of the block + * + * @return the hash of the block at the requested height, or a zeroed hash if there is no such block + */ crypto::hash get_block_id_by_height(uint64_t height) const; + + /** + * @brief gets the block with a given hash + * + * @param h the hash to look for + * @param blk return-by-reference variable to put result block in + * + * @return true if the block was found, else false + */ bool get_block_by_hash(const crypto::hash &h, block &blk) const; + + /** + * @brief get all block hashes (main chain, alt chains, and invalid blocks) + * + * @param main return-by-reference container to put result main chain blocks' hashes in + * @param alt return-by-reference container to put result alt chain blocks' hashes in + * @param invalid return-by-reference container to put result invalid blocks' hashes in + */ void get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid) const; + + /** + * @brief performs some preprocessing on a group of incoming blocks to speed up verification + * + * @param blocks a list of incoming blocks + * + * @return false on erroneous blocks, else true + */ bool prepare_handle_incoming_blocks(const std::list<block_complete_entry> &blocks); + + /** + * @brief incoming blocks post-processing, cleanup, and disk sync + * + * @param force_sync if true, and Blockchain is handling syncing to disk, always sync + * + * @return true + */ bool cleanup_handle_incoming_blocks(bool force_sync = false); + /** + * @brief search the blockchain for a transaction by hash + * + * @param id the hash to search for + * + * @return true if the tx exists, else false + */ bool have_tx(const crypto::hash &id) const; + + /** + * @brief check if any key image in a transaction has already been spent + * + * @param tx the transaction to check + * + * @return true if any key image is already spent in the blockchain, else false + */ bool have_tx_keyimges_as_spent(const transaction &tx) const; + + /** + * @brief check if a key image is already spent on the blockchain + * + * Whenever a transaction output is used as an input for another transaction + * (a true input, not just one of a mixing set), a key image is generated + * and stored in the transaction in order to prevent double spending. If + * this key image is seen again, the transaction using it is rejected. + * + * @param key_im the key image to search for + * + * @return true if the key image is already spent in the blockchain, else false + */ bool have_tx_keyimg_as_spent(const crypto::key_image &key_im) const; + /** + * @brief get the current height of the blockchain + * + * @return the height + */ uint64_t get_current_blockchain_height() const; + + /** + * @brief get the hash of the most recent block on the blockchain + * + * @return the hash + */ crypto::hash get_tail_id() const; + + /** + * @brief get the height and hash of the most recent block on the blockchain + * + * @param height return-by-reference variable to store the height in + * + * @return the hash + */ crypto::hash get_tail_id(uint64_t& height) const; + + /** + * @brief returns the difficulty target the next block to be added must meet + * + * @return the target + */ difficulty_type get_difficulty_for_next_block(); + + /** + * @brief adds a block to the blockchain + * + * Adds a new block to the blockchain. If the block's parent is not the + * current top of the blockchain, the block may be added to an alternate + * chain. If the block does not belong, is already in the blockchain + * or an alternate chain, or is invalid, return false. + * + * @param bl_ the block to be added + * @param bvc metadata about the block addition's success/failure + * + * @return true on successful addition to the blockchain, else false + */ bool add_new_block(const block& bl_, block_verification_context& bvc); + + /** + * @brief clears the blockchain and starts a new one + * + * @param b the first block in the new chain (the genesis block) + * + * @return true on success, else false + */ bool reset_and_set_genesis_block(const block& b); + + /** + * @brief creates a new block to mine against + * + * @param b return-by-reference block to be filled in + * @param miner_address address new coins for the block will go to + * @param di return-by-reference tells the miner what the difficulty target is + * @param height return-by-reference tells the miner what height it's mining against + * @param ex_nonce extra data to be added to the miner transaction's extra + * + * @return true if block template filled in successfully, else false + */ bool create_block_template(block& b, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, const blobdata& ex_nonce); + + /** + * @brief checks if a block is known about with a given hash + * + * This function checks the main chain, alternate chains, and invalid blocks + * for a block with the given hash + * + * @param id the hash to search for + * + * @return true if the block is known, else false + */ bool have_block(const crypto::hash& id) const; + + /** + * @brief gets the total number of transactions on the main chain + * + * @return the number of transactions on the main chain + */ size_t get_total_transactions() const; + + /** + * @brief gets the hashes for a subset of the blockchain + * + * puts into list <ids> a list of hashes representing certain blocks + * from the blockchain in reverse chronological order + * + * the blocks chosen, at the time of this writing, are: + * the most recent 11 + * powers of 2 less recent from there, so 13, 17, 25, etc... + * + * @param ids return-by-reference list to put the resulting hashes in + * + * @return true + */ bool get_short_chain_history(std::list<crypto::hash>& ids) const; + + /** + * @brief get recent block hashes for a foreign chain + * + * Find the split point between us and foreign blockchain and return + * (by reference) the most recent common block hash along with up to + * BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT additional (more recent) hashes. + * + * @param qblock_ids the foreign chain's "short history" (see get_short_chain_history) + * @param resp return-by-reference the split height and subsequent blocks' hashes + * + * @return true if a block found in common, else false + */ bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, NOTIFY_RESPONSE_CHAIN_ENTRY::request& resp) const; + + /** + * @brief find the most recent common point between ours and a foreign chain + * + * This function takes a list of block hashes from another node + * on the network to find where the split point is between us and them. + * This is used to see what to send another node that needs to sync. + * + * @param qblock_ids the foreign chain's "short history" (see get_short_chain_history) + * @param starter_offset return-by-reference the most recent common block's height + * + * @return true if a block found in common, else false + */ bool find_blockchain_supplement(const std::list<crypto::hash>& qblock_ids, uint64_t& starter_offset) const; + + /** + * @brief get recent blocks for a foreign chain + * + * This function gets recent blocks relative to a foreign chain, starting either at + * a requested height or whatever height is the most recent ours and the foreign + * chain have in common. + * + * @param req_start_block if non-zero, specifies a start point (otherwise find most recent commonality) + * @param qblock_ids the foreign chain's "short history" (see get_short_chain_history) + * @param blocks return-by-reference the blocks and their transactions + * @param total_height return-by-reference our current blockchain height + * @param start_height return-by-reference the height of the first block returned + * @param max_count the max number of blocks to get + * + * @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; + + /** + * @brief retrieves a set of blocks and their transactions, and possibly other transactions + * + * the request object encapsulates a list of block hashes and a (possibly empty) list of + * transaction hashes. for each block hash, the block is fetched along with all of that + * block's transactions. Any transactions requested separately are fetched afterwards. + * + * @param arg the request + * @param rsp return-by-reference the response to fill in + * + * @return true unless any blocks or transactions are missing + */ bool handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NOTIFY_RESPONSE_GET_OBJECTS::request& rsp); - bool handle_get_objects(const COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request& req, COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response& res); + + /** + * @brief gets random outputs to mix with + * + * This function takes an RPC request for outputs to mix with + * and creates an RPC response with the resultant output indices. + * + * Outputs to mix with are randomly selected from the utxo set + * for each output amount in the request. + * + * @param req the output amounts and number of mixins to select + * @param res return-by-reference the resultant output indices + * + * @return true + */ bool get_random_outs_for_amounts(const COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request& req, COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response& res) const; + + /** + * @brief gets the global indices for outputs from a given transaction + * + * This function gets the global indices for all outputs belonging + * to a specific transaction. + * + * @param tx_id the hash of the transaction to fetch indices for + * @param indexs return-by-reference the global indices for the transaction's outputs + * + * @return false if the transaction does not exist, or if no indices are found, otherwise true + */ bool get_tx_outputs_gindexs(const crypto::hash& tx_id, std::vector<uint64_t>& indexs) const; + + /** + * @brief stores the blockchain + * + * If Blockchain is handling storing of the blockchain (rather than BlockchainDB), + * this initiates a blockchain save. + * + * @return true unless saving the blockchain fails + */ bool store_blockchain(); + /** + * @brief validates a transaction's inputs + * + * validates a transaction's inputs as correctly used and not previously + * spent. also returns the hash and height of the most recent block + * which contains an output that was used as an input to the transaction. + * + * @param tx the transaction to validate + * @param pmax_used_block_height return-by-reference block height of most recent input + * @param max_used_block_id return-by-reference block hash of most recent input + * @param kept_by_block whether or not the transaction is from a previously-verified block + * + * @return false if any input is invalid, otherwise true + */ bool check_tx_inputs(const transaction& tx, uint64_t& pmax_used_block_height, crypto::hash& max_used_block_id, bool kept_by_block = false); + + /** + * @brief check that a transaction's outputs conform to current standards + * + * This function checks, for example at the time of this writing, that + * each output is of the form a * 10^b (phrased differently, that if + * written out would have only one non-zero digit in base 10). + * + * @param tx the transaction to check the outputs of + * + * @return false if any outputs do not conform, otherwise true + */ bool check_tx_outputs(const transaction& tx); + + /** + * @brief gets the blocksize limit based on recent blocks + * + * @return the limit + */ uint64_t get_current_cumulative_blocksize_limit() const; + + /** + * @brief checks if the blockchain is currently being stored + * + * Note: this should be meaningless in cases where Blockchain is not + * directly managing saving the blockchain to disk. + * + * @return true if Blockchain is having the chain stored currently, else false + */ bool is_storing_blockchain()const{return m_is_blockchain_storing;} + + /** + * @brief gets the difficulty of the block with a given height + * + * @param i the height + * + * @return the difficulty + */ uint64_t block_difficulty(uint64_t i) const; + /** + * @brief gets blocks based on a list of block hashes + * + * @tparam t_ids_container a standard-iterable container + * @tparam t_blocks_container a standard-iterable container + * @tparam t_missed_container a standard-iterable container + * @param block_ids a container of block hashes for which to get the corresponding blocks + * @param blocks return-by-reference a container to store result blocks in + * @param missed_bs return-by-reference a container to store missed blocks in + * + * @return false if an unexpected exception occurs, else true + */ template<class t_ids_container, class t_blocks_container, class t_missed_container> bool get_blocks(const t_ids_container& block_ids, t_blocks_container& blocks, t_missed_container& missed_bs) const; + /** + * @brief gets transactions based on a list of transaction hashes + * + * @tparam t_ids_container a standard-iterable container + * @tparam t_tx_container a standard-iterable container + * @tparam t_missed_container a standard-iterable container + * @param txs_ids a container of hashes for which to get the corresponding transactions + * @param txs return-by-reference a container to store result transactions in + * @param missed_txs return-by-reference a container to store missed transactions in + * + * @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(const t_ids_container& txs_ids, t_tx_container& txs, t_missed_container& missed_txs) const; + //debug functions + + /** + * @brief prints data about a snippet of the blockchain + * + * if start_index is greater than the blockchain height, do nothing + * + * @param start_index height on chain to start at + * @param end_index height on chain to end at + */ void print_blockchain(uint64_t start_index, uint64_t end_index) const; + + /** + * @brief prints every block's hash + * + * WARNING: This function will absolutely crush a terminal in prints, so + * it is recommended to redirect this output to a log file (or null sink + * if a log file is already set up, as should be the default) + */ void print_blockchain_index() const; + + /** + * @brief currently does nothing, candidate for removal + * + * @param file + */ void print_blockchain_outs(const std::string& file) const; + /** + * @brief check the blockchain against a set of checkpoints + * + * If a block fails a checkpoint and enforce is enabled, the blockchain + * will be rolled back to two blocks prior to that block. If enforce + * is disabled, as is currently the default case with DNS-based checkpoints, + * an error will be printed to the user but no other action will be taken. + * + * @param points the checkpoints to check against + * @param enforce whether or not to take action on failure + */ void check_against_checkpoints(const checkpoints& points, bool enforce); + + /** + * @brief configure whether or not to enforce DNS-based checkpoints + * + * @param enforce the new enforcement setting + */ void set_enforce_dns_checkpoints(bool enforce); + + /** + * @brief loads new checkpoints from a file and optionally from DNS + * + * @param file_path the path of the file to look for and load checkpoints from + * @param check_dns whether or not to check for new DNS-based checkpoints + * + * @return false if any enforced checkpoint type fails to load, otherwise true + */ bool update_checkpoints(const std::string& file_path, bool check_dns); + // user options, must be called before calling init() + + //FIXME: parameter names don't match function definition in .cpp file + /** + * @brief sets various performance options + * + * @param block_threads max number of threads when preparing blocks for addition + * @param blocks_per_sync number of blocks to cache before syncing to database + * @param sync_mode the ::blockchain_db_sync_mode to use + * @param fast_sync sync using built-in block hashes as trusted + */ void set_user_options(uint64_t block_threads, uint64_t blocks_per_sync, blockchain_db_sync_mode sync_mode, bool fast_sync); + /** + * @brief set whether or not to show/print time statistics + * + * @param stats the new time stats setting + */ void set_show_time_stats(bool stats) { m_show_time_stats = stats; } + /** + * @brief gets the hardfork voting state object + * + * @return the HardFork object + */ HardFork::State get_hard_fork_state() const; + + /** + * @brief gets the current hardfork version in use/voted for + * + * @return the version + */ uint8_t get_current_hard_fork_version() const { return m_hardfork->get_current_version(); } + + /** + * @brief returns the newest hardfork version known to the blockchain + * + * @return the version + */ uint8_t get_ideal_hard_fork_version() const { return m_hardfork->get_ideal_version(); } + + /** + * @brief returns the newest hardfork version voted to be enabled + * as of a certain height + * + * @param height the height for which to check version info + * + * @return the version + */ uint8_t get_ideal_hard_fork_version(uint64_t height) const { return m_hardfork->get_ideal_version(height); } + /** + * @brief get information about hardfork voting for a version + * + * @param version the version in question + * @param window the size of the voting window + * @param votes the number of votes to enable <version> + * @param threshold the number of votes required to enable <version> + * @param earliest_height the earliest height at which <version> is allowed + * @param voting which version this node is voting for/using + * + * @return whether the version queried is enabled + */ bool get_hard_fork_voting_info(uint8_t version, uint32_t &window, uint32_t &votes, uint32_t &threshold, uint64_t &earliest_height, uint8_t &voting) const; + /** + * @brief remove transactions from the transaction pool (if present) + * + * @param txids a list of hashes of transactions to be removed + * + * @return false if any removals fail, otherwise true + */ bool flush_txes_from_pool(const std::list<crypto::hash> &txids); + /** + * @brief perform a check on all key images in the blockchain + * + * @param std::function the check to perform, pass/fail + * + * @return false if any key image fails the check, otherwise true + */ bool for_all_key_images(std::function<bool(const crypto::key_image&)>) const; + + /** + * @brief perform a check on all blocks in the blockchain + * + * @param std::function the check to perform, pass/fail + * + * @return false if any block fails the check, otherwise true + */ bool for_all_blocks(std::function<bool(uint64_t, const crypto::hash&, const block&)>) const; + + /** + * @brief perform a check on all transactions in the blockchain + * + * @param std::function the check to perform, pass/fail + * + * @return false if any transaction fails the check, otherwise true + */ bool for_all_transactions(std::function<bool(const crypto::hash&, const cryptonote::transaction&)>) const; + + /** + * @brief perform a check on all outputs in the blockchain + * + * @param std::function the check to perform, pass/fail + * + * @return false if any output fails the check, otherwise true + */ bool for_all_outputs(std::function<bool(uint64_t amount, const crypto::hash &tx_hash, size_t tx_idx)>) const; + /** + * @brief get a reference to the BlockchainDB in use by Blockchain + * + * @return a reference to the BlockchainDB instance + */ BlockchainDB& get_db() { return *m_db; } + /** + * @brief get a number of outputs of a specific amount + * + * @param amount the amount + * @param offsets the indices (indexed to the amount) of the outputs + * @param outputs return-by-reference the outputs collected + * @param txs unused, candidate for removal + */ void output_scan_worker(const uint64_t amount,const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs, std::unordered_map<crypto::hash, cryptonote::transaction> &txs) const; + /** + * @brief computes the "short" and "long" hashes for a set of blocks + * + * @param height the height of the first block + * @param blocks the blocks to be hashed + * @param map return-by-reference the hashes for each block + */ void block_longhash_worker(const uint64_t height, const std::vector<block> &blocks, std::unordered_map<crypto::hash, crypto::hash> &map) const; private: + + // TODO: evaluate whether or not each of these typedefs are left over from blockchain_storage typedef std::unordered_map<crypto::hash, size_t> blocks_by_id_index; + typedef std::unordered_map<crypto::hash, transaction_chain_entry> transactions_container; + typedef std::unordered_set<crypto::key_image> key_images_container; + typedef std::vector<block_extended_info> blocks_container; + typedef std::unordered_map<crypto::hash, block_extended_info> blocks_ext_by_hash; + typedef std::unordered_map<crypto::hash, block> blocks_by_hash; + typedef std::map<uint64_t, std::vector<std::pair<crypto::hash, size_t>>> outputs_container; //crypto::hash - tx hash, size_t - index of out in transaction + BlockchainDB* m_db; tx_memory_pool& m_tx_pool; + mutable epee::critical_section m_blockchain_lock; // TODO: add here reader/writer lock // main chain transactions_container m_transactions; size_t m_current_block_cumul_sz_limit; + // metadata containers std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, std::vector<output_data_t>>> m_scan_table; std::unordered_map<crypto::hash, std::pair<bool, uint64_t>> m_check_tx_inputs_table; std::unordered_map<crypto::hash, crypto::hash> m_blocks_longhash_table; @@ -243,39 +819,323 @@ namespace cryptonote bool m_testnet; + /** + * @brief collects the keys for all outputs being "spent" as an input + * + * This function makes sure that each "input" in an input (mixins) exists + * and collects the public key for each from the transaction it was included in + * via the visitor passed to it. + * + * If pmax_related_block_height is not NULL, its value is set to the height + * of the most recent block which contains an output used in the input set + * + * @tparam visitor_t a class encapsulating tx is unlocked and collect tx key + * @param tx_in_to_key a transaction input instance + * @param vis an instance of the visitor to use + * @param tx_prefix_hash the hash of the associated transaction_prefix + * @param pmax_related_block_height return-by-pointer the height of the most recent block in the input set + * + * @return false if any keys are not found or any inputs are not unlocked, otherwise true + */ template<class visitor_t> inline bool scan_outputkeys_for_indexes(const txin_to_key& tx_in_to_key, visitor_t &vis, const crypto::hash &tx_prefix_hash, uint64_t* pmax_related_block_height = NULL) const; + + /** + * @brief collect output public keys of a transaction input set + * + * This function locates all outputs associated with a given input set (mixins) + * and validates that they exist and are usable + * (unlocked, unspent is checked elsewhere). + * + * If pmax_related_block_height is not NULL, its value is set to the height + * of the most recent block which contains an output used in the input set + * + * @param txin the transaction input + * @param tx_prefix_hash the transaction prefix hash, for caching organization + * @param sig the input signature + * @param output_keys return-by-reference the public keys of the outputs in the input set + * @param pmax_related_block_height return-by-pointer the height of the most recent block in the input set + * + * @return false if any output is not yet unlocked, or is missing, otherwise true + */ bool check_tx_input(const txin_to_key& txin, const crypto::hash& tx_prefix_hash, const std::vector<crypto::signature>& sig, std::vector<crypto::public_key> &output_keys, uint64_t* pmax_related_block_height); + + /** + * @brief validate a transaction's inputs and their keys + * + * This function validates transaction inputs and their keys. Previously + * it also performed double spend checking, but that has been moved to its + * own function. + * + * If pmax_related_block_height is not NULL, its value is set to the height + * of the most recent block which contains an output used in any input set + * + * Currently this function calls ring signature validation for each + * transaction. + * + * @param tx the transaction to validate + * @param pmax_related_block_height return-by-pointer the height of the most recent block in the input set + * + * @return false if any validation step fails, otherwise true + */ bool check_tx_inputs(const transaction& tx, uint64_t* pmax_used_block_height = NULL); + /** + * @brief performs a blockchain reorganization according to the longest chain rule + * + * This function aggregates all the actions necessary to switch to a + * newly-longer chain. If any step in the reorganization process fails, + * the blockchain is reverted to its previous state. + * + * @param alt_chain the chain to switch to + * @param discard_disconnected_chain whether or not to keep the old chain as an alternate + * + * @return false if the reorganization fails, otherwise true + */ bool switch_to_alternative_blockchain(std::list<blocks_ext_by_hash::iterator>& alt_chain, bool discard_disconnected_chain); + + /** + * @brief removes the most recent block from the blockchain + * + * @return the block removed + */ block pop_block_from_blockchain(); + /** + * @brief validate and add a new block to the end of the blockchain + * + * This function is merely a convenience wrapper around the other + * of the same name. This one passes the block's hash to the other + * as well as the block and verification context. + * + * @param bl the block to be added + * @param bvc metadata concerning the block's validity + * + * @return true if the block was added successfully, otherwise false + */ bool handle_block_to_main_chain(const block& bl, block_verification_context& bvc); + + /** + * @brief validate and add a new block to the end of the blockchain + * + * When a block is given to Blockchain to be added to the blockchain, it + * is passed here if it is determined to belong at the end of the current + * chain. + * + * @param bl the block to be added + * @param id the hash of the block + * @param bvc metadata concerning the block's validity + * + * @return true if the block was added successfully, otherwise false + */ bool handle_block_to_main_chain(const block& bl, const crypto::hash& id, block_verification_context& bvc); + + /** + * @brief validate and add a new block to an alternate blockchain + * + * If a block to be added does not belong to the main chain, but there + * is an alternate chain to which it should be added, that is handled + * here. + * + * @param b the block to be added + * @param id the hash of the block + * @param bvc metadata concerning the block's validity + * + * @return true if the block was added successfully, otherwise false + */ bool handle_alternative_block(const block& b, const crypto::hash& id, block_verification_context& bvc); + + /** + * @brief gets the difficulty requirement for a new block on an alternate chain + * + * @param alt_chain the chain to be added to + * @param bei the block being added (and metadata, see ::block_extended_info) + * + * @return the difficulty requirement + */ difficulty_type get_next_difficulty_for_alternative_chain(const std::list<blocks_ext_by_hash::iterator>& alt_chain, block_extended_info& bei) const; + + /** + * @brief sanity checks a miner transaction before validating an entire block + * + * This function merely checks basic things like the structure of the miner + * transaction, the unlock time, and that the amount doesn't overflow. + * + * @param b the block containing the miner transaction + * @param height the height at which the block will be added + * + * @return false if anything is found wrong with the miner transaction, otherwise true + */ bool prevalidate_miner_transaction(const block& b, uint64_t height); + + /** + * @brief validates a miner (coinbase) transaction + * + * This function makes sure that the miner calculated his reward correctly + * and that his miner transaction totals reward + fee. + * + * @param b the block containing the miner transaction to be validated + * @param cumulative_block_size the block's size + * @param fee the total fees collected in the block + * @param base_reward return-by-reference the new block's generated coins + * @param already_generated_coins the amount of currency generated prior to this block + * @param partial_block_reward return-by-reference true if miner accepted only partial reward + * + * @return false if anything is found wrong with the miner transaction, otherwise true + */ bool validate_miner_transaction(const block& b, size_t cumulative_block_size, uint64_t fee, uint64_t& base_reward, uint64_t already_generated_coins, bool &partial_block_reward); - bool validate_transaction(const block& b, uint64_t height, const transaction& tx); + + /** + * @brief reverts the blockchain to its previous state following a failed switch + * + * If Blockchain fails to switch to an alternate chain when it means + * to do so, this function reverts the blockchain to how it was before + * the attempted switch. + * + * @param original_chain the chain to switch back to + * @param rollback_height the height to revert to before appending the original chain + * + * @return false if something goes wrong with reverting (very bad), otherwise true + */ bool rollback_blockchain_switching(std::list<block>& original_chain, uint64_t rollback_height); - bool add_transaction_from_block(const transaction& tx, const crypto::hash& tx_id, const crypto::hash& bl_id, uint64_t bl_height); - bool push_transaction_to_global_outs_index(const transaction& tx, const crypto::hash& tx_id, std::vector<uint64_t>& global_indexes); - bool pop_transaction_from_global_index(const transaction& tx, const crypto::hash& tx_id); + + /** + * @brief gets recent block sizes for median calculation + * + * get the block sizes of the last <count> blocks, and return by reference <sz>. + * + * @param sz return-by-reference the list of sizes + * @param count the number of blocks to get sizes for + */ void get_last_n_blocks_sizes(std::vector<size_t>& sz, size_t count) const; + + /** + * @brief adds the given output to the requested set of random outputs + * + * @param result_outs return-by-reference the set the output is to be added to + * @param amount the output amount + * @param i the output index (indexed to amount) + */ void add_out_to_get_random_outs(COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::outs_for_amount& result_outs, uint64_t amount, size_t i) const; + + /** + * @brief checks if a transaction is unlocked (its outputs spendable) + * + * This function checks to see if a transaction is unlocked. + * unlock_time is either a block index or a unix time. + * + * @param unlock_time the unlock parameter (height or time) + * + * @return true if spendable, otherwise false + */ bool is_tx_spendtime_unlocked(uint64_t unlock_time) const; + + /** + * @brief stores an invalid block in a separate container + * + * Storing invalid blocks allows quick dismissal of the same block + * if it is seen again. + * + * @param bl the invalid block + * @param h the block's hash + * + * @return false if the block cannot be stored for some reason, otherwise true + */ bool add_block_as_invalid(const block& bl, const crypto::hash& h); + + /** + * @brief stores an invalid block in a separate container + * + * Storing invalid blocks allows quick dismissal of the same block + * if it is seen again. + * + * @param bei the invalid block (see ::block_extended_info) + * @param h the block's hash + * + * @return false if the block cannot be stored for some reason, otherwise true + */ bool add_block_as_invalid(const block_extended_info& bei, const crypto::hash& h); + + /** + * @brief checks a block's timestamp + * + * This function grabs the timestamps from the most recent <n> blocks, + * where n = BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW. If there are not those many + * blocks in the blockchain, the timestap is assumed to be valid. If there + * are, this function returns: + * true if the block's timestamp is not less than the timestamp of the + * median of the selected blocks + * false otherwise + * + * @param b the block to be checked + * + * @return true if the block's timestamp is valid, otherwise false + */ bool check_block_timestamp(const block& b) const; + + /** + * @brief checks a block's timestamp + * + * If the block is not more recent than the median of the recent + * timestamps passed here, it is considered invalid. + * + * @param timestamps a list of the most recent timestamps to check against + * @param b the block to be checked + * + * @return true if the block's timestamp is valid, otherwise false + */ bool check_block_timestamp(std::vector<uint64_t>& timestamps, const block& b) const; + + /** + * @brief get the "adjusted time" + * + * Currently this simply returns the current time according to the + * user's machine. + * + * @return the current time + */ uint64_t get_adjusted_time() const; + + /** + * @brief finish an alternate chain's timestamp window from the main chain + * + * for an alternate chain, get the timestamps from the main chain to complete + * the needed number of timestamps for the BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW. + * + * @param start_height the alternate chain's attachment height to the main chain + * @param timestamps return-by-value the timestamps set to be populated + * + * @return true unless start_height is greater than the current blockchain height + */ bool complete_timestamps_vector(uint64_t start_height, std::vector<uint64_t>& timestamps); + + /** + * @brief calculate the block size limit for the next block to be added + * + * @return true + */ bool update_next_cumulative_size_limit(); void return_tx_to_pool(const std::vector<transaction> &txs); + /** + * @brief make sure a transaction isn't attempting a double-spend + * + * @param tx the transaction to check + * @param keys_this_block a cumulative list of spent keys for the current block + * + * @return false if a double spend was detected, otherwise true + */ bool check_for_double_spend(const transaction& tx, key_images_container& keys_this_block) const; - void get_timestamp_and_difficulty(uint64_t ×tamp, difficulty_type &difficulty, const int offset) const; + + /** + * @brief validates a transaction input's ring signature + * + * @param tx_prefix_hash the transaction prefix' hash + * @param key_image the key image generated from the true input + * @param pubkeys the public keys for each input in the ring signature + * @param sig the signature generated for each input in the ring signature + * @param result false if the ring signature is invalid, otherwise true + */ void check_ring_signature(const crypto::hash &tx_prefix_hash, const crypto::key_image &key_image, const std::vector<crypto::public_key> &pubkeys, const std::vector<crypto::signature> &sig, uint64_t &result); diff --git a/src/cryptonote_core/blockchain_storage.cpp b/src/cryptonote_core/blockchain_storage.cpp index e1b89f887..a829b7cbe 100644 --- a/src/cryptonote_core/blockchain_storage.cpp +++ b/src/cryptonote_core/blockchain_storage.cpp @@ -48,7 +48,7 @@ #include "common/boost_serialization_helper.h" #include "warnings.h" #include "crypto/hash.h" -#include "cryptonote_core/checkpoints_create.h" +#include "cryptonote_core/checkpoints.h" //#include "serialization/json_archive.h" #include "../../contrib/otshell_utils/utils.hpp" #include "../../src/p2p/data_logger.hpp" @@ -1854,7 +1854,7 @@ void blockchain_storage::check_against_checkpoints(const checkpoints& points, bo // with an existing checkpoint. bool blockchain_storage::update_checkpoints(const std::string& file_path, bool check_dns) { - if (!cryptonote::load_checkpoints_from_json(m_checkpoints, file_path)) + if (!m_checkpoints.load_checkpoints_from_json(file_path)) { return false; } @@ -1863,7 +1863,7 @@ bool blockchain_storage::update_checkpoints(const std::string& file_path, bool c // if we're not hard-enforcing dns checkpoints, handle accordingly if (m_enforce_dns_checkpoints && check_dns) { - if (!cryptonote::load_checkpoints_from_dns(m_checkpoints)) + if (!m_checkpoints.load_checkpoints_from_dns()) { return false; } @@ -1871,7 +1871,7 @@ bool blockchain_storage::update_checkpoints(const std::string& file_path, bool c else if (check_dns) { checkpoints dns_points; - cryptonote::load_checkpoints_from_dns(dns_points, m_testnet); + dns_points.load_checkpoints_from_dns(m_testnet); if (m_checkpoints.check_for_conflicts(dns_points)) { check_against_checkpoints(dns_points, false); diff --git a/src/cryptonote_core/checkpoints.cpp b/src/cryptonote_core/checkpoints.cpp index 24d066dae..c038a4802 100644 --- a/src/cryptonote_core/checkpoints.cpp +++ b/src/cryptonote_core/checkpoints.cpp @@ -1,21 +1,21 @@ // Copyright (c) 2014-2016, The Monero Project -// +// // All rights reserved. -// +// // Redistribution and use in source and binary forms, with or without modification, are // permitted provided that the following conditions are met: -// +// // 1. Redistributions of source code must retain the above copyright notice, this list of // conditions and the following disclaimer. -// +// // 2. Redistributions in binary form must reproduce the above copyright notice, this list // of conditions and the following disclaimer in the documentation and/or other // materials provided with the distribution. -// +// // 3. Neither the name of the copyright holder nor the names of its contributors may be // used to endorse or promote products derived from this software without specific // prior written permission. -// +// // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL @@ -25,14 +25,44 @@ // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// +// // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers #include "include_base_utils.h" + using namespace epee; #include "checkpoints.h" +#include "common/dns_utils.h" +#include "include_base_utils.h" +#include <sstream> +#include <random> + +namespace +{ + bool dns_records_match(const std::vector<std::string>& a, const std::vector<std::string>& b) + { + if (a.size() != b.size()) return false; + + for (const auto& record_in_a : a) + { + bool ok = false; + for (const auto& record_in_b : b) + { + if (record_in_a == record_in_b) + { + ok = true; + break; + } + } + if (!ok) return false; + } + + return true; + } +} // anonymous namespace + namespace cryptonote { //--------------------------------------------------------------------------- @@ -84,10 +114,7 @@ namespace cryptonote return check_block(height, h, ignored); } //--------------------------------------------------------------------------- - // this basically says if the blockchain is smaller than the first - // checkpoint then alternate blocks are allowed. Alternatively, if the - // last checkpoint *before* the end of the current chain is also before - // the block to be added, then this is fine. + //FIXME: is this the desired behavior? bool checkpoints::is_alternative_block_allowed(uint64_t blockchain_height, uint64_t block_height) const { if (0 == block_height) @@ -128,4 +155,206 @@ namespace cryptonote } return true; } + + bool checkpoints::init_default_checkpoints() + { + ADD_CHECKPOINT(1, "771fbcd656ec1464d3a02ead5e18644030007a0fc664c0a964d30922821a8148"); + ADD_CHECKPOINT(10, "c0e3b387e47042f72d8ccdca88071ff96bff1ac7cde09ae113dbb7ad3fe92381"); + ADD_CHECKPOINT(100, "ac3e11ca545e57c49fca2b4e8c48c03c23be047c43e471e1394528b1f9f80b2d"); + ADD_CHECKPOINT(1000, "5acfc45acffd2b2e7345caf42fa02308c5793f15ec33946e969e829f40b03876"); + ADD_CHECKPOINT(10000, "c758b7c81f928be3295d45e230646de8b852ec96a821eac3fea4daf3fcac0ca2"); + ADD_CHECKPOINT(22231, "7cb10e29d67e1c069e6e11b17d30b809724255fee2f6868dc14cfc6ed44dfb25"); + ADD_CHECKPOINT(29556, "53c484a8ed91e4da621bb2fa88106dbde426fe90d7ef07b9c1e5127fb6f3a7f6"); + ADD_CHECKPOINT(50000, "0fe8758ab06a8b9cb35b7328fd4f757af530a5d37759f9d3e421023231f7b31c"); + ADD_CHECKPOINT(80000, "a62dcd7b536f22e003ebae8726e9e7276f63d594e264b6f0cd7aab27b66e75e3"); + ADD_CHECKPOINT(202612, "bbd604d2ba11ba27935e006ed39c9bfdd99b76bf4a50654bc1e1e61217962698"); + ADD_CHECKPOINT(202613, "e2aa337e78df1f98f462b3b1e560c6b914dec47b610698b7b7d1e3e86b6197c2"); + ADD_CHECKPOINT(202614, "c29e3dc37d8da3e72e506e31a213a58771b24450144305bcba9e70fa4d6ea6fb"); + ADD_CHECKPOINT(205000, "5d3d7a26e6dc7535e34f03def711daa8c263785f73ec1fadef8a45880fde8063"); + ADD_CHECKPOINT(220000, "9613f455933c00e3e33ac315cc6b455ee8aa0c567163836858c2d9caff111553"); + ADD_CHECKPOINT(230300, "bae7a80c46859db355556e3a9204a337ae8f24309926a1312323fdecf1920e61"); + ADD_CHECKPOINT(230700, "93e631240ceac831da1aebfc5dac8f722c430463024763ebafa888796ceaeedf"); + ADD_CHECKPOINT(231350, "b5add137199b820e1ea26640e5c3e121fd85faa86a1e39cf7e6cc097bdeb1131"); + ADD_CHECKPOINT(232150, "955de8e6b6508af2c24f7334f97beeea651d78e9ade3ab18fec3763be3201aa8"); + ADD_CHECKPOINT(249380, "654fb0a81ce3e5caf7e3264a70f447d4bd07586c08fa50f6638cc54da0a52b2d"); + ADD_CHECKPOINT(460000, "75037a7aed3e765db96c75bcf908f59d690a5f3390baebb9edeafd336a1c4831"); + ADD_CHECKPOINT(500000, "2428f0dbe49796be05ed81b347f53e1f7f44aed0abf641446ec2b94cae066b02"); + ADD_CHECKPOINT(600000, "f5828ebf7d7d1cb61762c4dfe3ccf4ecab2e1aad23e8113668d981713b7a54c5"); + ADD_CHECKPOINT(700000, "12be9b3d210b93f574d2526abb9c1ab2a881b479131fd0d4f7dac93875f503cd"); + ADD_CHECKPOINT(825000, "56503f9ad766774b575be3aff73245e9d159be88132c93d1754764f28da2ff60"); + ADD_CHECKPOINT(900000, "d9958d0e7dcf91a5a7b11de225927bf7efc6eb26240315ce12372be902cc1337"); + ADD_CHECKPOINT(913193, "5292d5d56f6ba4de33a58d9a34d263e2cb3c6fee0aed2286fd4ac7f36d53c85f"); + + return true; + } + + bool checkpoints::load_checkpoints_from_json(const std::string json_hashfile_fullpath) + { + boost::system::error_code errcode; + if (! (boost::filesystem::exists(json_hashfile_fullpath, errcode))) + { + LOG_PRINT_L1("Blockchain checkpoints file not found"); + return true; + } + + LOG_PRINT_L1("Adding checkpoints from blockchain hashfile"); + + uint64_t prev_max_height = get_max_height(); + LOG_PRINT_L1("Hard-coded max checkpoint height is " << prev_max_height); + t_hash_json hashes; + epee::serialization::load_t_from_json_file(hashes, json_hashfile_fullpath); + for (std::vector<t_hashline>::const_iterator it = hashes.hashlines.begin(); it != hashes.hashlines.end(); ) + { + uint64_t height; + height = it->height; + if (height <= prev_max_height) { + LOG_PRINT_L1("ignoring checkpoint height " << height); + } else { + std::string blockhash = it->hash; + LOG_PRINT_L1("Adding checkpoint height " << height << ", hash=" << blockhash); + ADD_CHECKPOINT(height, blockhash); + } + ++it; + } + + return true; + } + + bool checkpoints::load_checkpoints_from_dns(bool testnet) + { + // All four MoneroPulse domains have DNSSEC on and valid + static const std::vector<std::string> dns_urls = { "checkpoints.moneropulse.se" + , "checkpoints.moneropulse.org" + , "checkpoints.moneropulse.net" + , "checkpoints.moneropulse.co" + }; + + static const std::vector<std::string> testnet_dns_urls = { "testpoints.moneropulse.se" + , "testpoints.moneropulse.org" + , "testpoints.moneropulse.net" + , "testpoints.moneropulse.co" + }; + + std::vector<std::vector<std::string> > records; + records.resize(dns_urls.size()); + + std::random_device rd; + std::mt19937 gen(rd()); + std::uniform_int_distribution<int> dis(0, dns_urls.size() - 1); + size_t first_index = dis(gen); + + bool avail, valid; + size_t cur_index = first_index; + do + { + std::string url; + if (testnet) + { + url = testnet_dns_urls[cur_index]; + } + else + { + url = dns_urls[cur_index]; + } + + records[cur_index] = tools::DNSResolver::instance().get_txt_record(url, avail, valid); + if (!avail) + { + records[cur_index].clear(); + LOG_PRINT_L2("DNSSEC not available for checkpoint update at URL: " << url << ", skipping."); + } + if (!valid) + { + records[cur_index].clear(); + LOG_PRINT_L2("DNSSEC validation failed for checkpoint update at URL: " << url << ", skipping."); + } + + cur_index++; + if (cur_index == dns_urls.size()) + { + cur_index = 0; + } + records[cur_index].clear(); + } while (cur_index != first_index); + + size_t num_valid_records = 0; + + for( const auto& record_set : records) + { + if (record_set.size() != 0) + { + num_valid_records++; + } + } + + if (num_valid_records < 2) + { + LOG_PRINT_L0("WARNING: no two valid MoneroPulse DNS checkpoint records were received"); + return true; + } + + int good_records_index = -1; + for (size_t i = 0; i < records.size() - 1; ++i) + { + if (records[i].size() == 0) continue; + + for (size_t j = i + 1; j < records.size(); ++j) + { + if (dns_records_match(records[i], records[j])) + { + good_records_index = i; + break; + } + } + if (good_records_index >= 0) break; + } + + if (good_records_index < 0) + { + LOG_PRINT_L0("WARNING: no two MoneroPulse DNS checkpoint records matched"); + return true; + } + + for (auto& record : records[good_records_index]) + { + auto pos = record.find(":"); + if (pos != std::string::npos) + { + uint64_t height; + crypto::hash hash; + + // parse the first part as uint64_t, + // if this fails move on to the next record + std::stringstream ss(record.substr(0, pos)); + if (!(ss >> height)) + { + continue; + } + + // parse the second part as crypto::hash, + // if this fails move on to the next record + std::string hashStr = record.substr(pos + 1); + if (!epee::string_tools::parse_tpod_from_hex_string(hashStr, hash)) + { + continue; + } + + ADD_CHECKPOINT(height, hashStr); + } + } + return true; + } + + bool checkpoints::load_new_checkpoints(const std::string json_hashfile_fullpath, bool testnet, bool dns) + { + bool result; + + result = load_checkpoints_from_json(json_hashfile_fullpath); + if (dns) + { + result &= load_checkpoints_from_dns(testnet); + } + + return result; + } } diff --git a/src/cryptonote_core/checkpoints.h b/src/cryptonote_core/checkpoints.h index 00a53ec24..71727753e 100644 --- a/src/cryptonote_core/checkpoints.h +++ b/src/cryptonote_core/checkpoints.h @@ -1,21 +1,21 @@ // Copyright (c) 2014-2016, The Monero Project -// +// // All rights reserved. -// +// // Redistribution and use in source and binary forms, with or without modification, are // permitted provided that the following conditions are met: -// +// // 1. Redistributions of source code must retain the above copyright notice, this list of // conditions and the following disclaimer. -// +// // 2. Redistributions in binary form must reproduce the above copyright notice, this list // of conditions and the following disclaimer in the documentation and/or other // materials provided with the distribution. -// +// // 3. Neither the name of the copyright holder nor the names of its contributors may be // used to endorse or promote products derived from this software without specific // prior written permission. -// +// // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL @@ -25,30 +25,193 @@ // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// +// // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers #pragma once #include <map> #include <vector> #include "cryptonote_basic_impl.h" +#include "misc_log_ex.h" +#include "storages/portable_storage_template_helper.h" // epee json include + +#define ADD_CHECKPOINT(h, hash) CHECK_AND_ASSERT(add_checkpoint(h, hash), false); +#define JSON_HASH_FILE_NAME "checkpoints.json" namespace cryptonote { + /** + * @brief A container for blockchain checkpoints + * + * A checkpoint is a pre-defined hash for the block at a given height. + * Some of these are compiled-in, while others can be loaded at runtime + * either from a json file or via DNS from a checkpoint-hosting server. + */ class checkpoints { public: + + /** + * @brief default constructor + */ checkpoints(); + + /** + * @brief adds a checkpoint to the container + * + * @param height the height of the block the checkpoint is for + * @param hash_str the hash of the block, as a string + * + * @return false if parsing the hash fails, or if the height is a duplicate + * AND the existing checkpoint hash does not match the new one, + * otherwise returns true + */ bool add_checkpoint(uint64_t height, const std::string& hash_str); + + /** + * @brief checks if there is a checkpoint in the future + * + * This function checks if the height passed is lower than the highest + * checkpoint. + * + * @param height the height to check against + * + * @return false if no checkpoints, otherwise returns whether or not + * the height passed is lower than the highest checkpoint. + */ bool is_in_checkpoint_zone(uint64_t height) const; - bool check_block(uint64_t height, const crypto::hash& h) const; + + /** + * @brief checks if the given height and hash agree with the checkpoints + * + * This function checks if the given height and hash exist in the + * checkpoints container. If so, it returns whether or not the passed + * parameters match the stored values. + * + * @param height the height to be checked + * @param h the hash to be checked + * @param is_a_checkpoint return-by-reference if there is a checkpoint at the given height + * + * @return true if there is no checkpoint at the given height, + * true if the passed parameters match the stored checkpoint, + * false otherwise + */ bool check_block(uint64_t height, const crypto::hash& h, bool& is_a_checkpoint) const; + + /** + * @overload + */ + bool check_block(uint64_t height, const crypto::hash& h) const; + + /** + * @brief checks if alternate chain blocks should be kept for a given height + * + * this basically says if the blockchain is smaller than the first + * checkpoint then alternate blocks are allowed. Alternatively, if the + * last checkpoint *before* the end of the current chain is also before + * the block to be added, then this is fine. + * + * @param blockchain_height the current blockchain height + * @param block_height the height of the block to be added as alternate + * + * @return true if alternate blocks are allowed given the parameters, + * otherwise false + */ bool is_alternative_block_allowed(uint64_t blockchain_height, uint64_t block_height) const; + + /** + * @brief gets the highest checkpoint height + * + * @return the height of the highest checkpoint + */ uint64_t get_max_height() const; + + /** + * @brief gets the checkpoints container + * + * @return a const reference to the checkpoints container + */ const std::map<uint64_t, crypto::hash>& get_points() const; + + /** + * @brief checks if our checkpoints container conflicts with another + * + * A conflict refers to a case where both checkpoint sets have a checkpoint + * for a specific height but their hashes for that height do not match. + * + * @param other the other checkpoints instance to check against + * + * @return false if any conflict is found, otherwise true + */ bool check_for_conflicts(const checkpoints& other) const; + + /** + * @brief loads the default main chain checkpoints + * + * @return true unless adding a checkpoint fails + */ + bool init_default_checkpoints(); + + /** + * @brief load new checkpoints + * + * Loads new checkpoints from the specified json file, as well as + * (optionally) from DNS. + * + * @param json_hashfile_fullpath path to the json checkpoints file + * @param testnet whether to load testnet checkpoints or mainnet + * @param dns whether or not to load DNS checkpoints + * + * @return true if loading successful and no conflicts + */ + bool load_new_checkpoints(const std::string json_hashfile_fullpath, bool testnet=false, bool dns=true); + + /** + * @brief load new checkpoints from json + * + * @param json_hashfile_fullpath path to the json checkpoints file + * + * @return true if loading successful and no conflicts + */ + bool load_checkpoints_from_json(const std::string json_hashfile_fullpath); + + /** + * @brief load new checkpoints from DNS + * + * @param testnet whether to load testnet checkpoints or mainnet + * + * @return true if loading successful and no conflicts + */ + bool load_checkpoints_from_dns(bool testnet = false); + private: - std::map<uint64_t, crypto::hash> m_points; + + + /** + * @brief struct for loading a checkpoint from json + */ + struct t_hashline + { + uint64_t height; //!< the height of the checkpoint + std::string hash; //!< the hash for the checkpoint + BEGIN_KV_SERIALIZE_MAP() + KV_SERIALIZE(height) + KV_SERIALIZE(hash) + END_KV_SERIALIZE_MAP() + }; + + /** + * @brief struct for loading many checkpoints from json + */ + struct t_hash_json { + std::vector<t_hashline> hashlines; //!< the checkpoint lines from the file + BEGIN_KV_SERIALIZE_MAP() + KV_SERIALIZE(hashlines) + END_KV_SERIALIZE_MAP() + }; + + std::map<uint64_t, crypto::hash> m_points; //!< the checkpoints container + }; } diff --git a/src/cryptonote_core/checkpoints_create.cpp b/src/cryptonote_core/checkpoints_create.cpp deleted file mode 100644 index 41f2321d5..000000000 --- a/src/cryptonote_core/checkpoints_create.cpp +++ /dev/null @@ -1,280 +0,0 @@ -// Copyright (c) 2014-2016, The Monero Project -// -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without modification, are -// permitted provided that the following conditions are met: -// -// 1. Redistributions of source code must retain the above copyright notice, this list of -// conditions and the following disclaimer. -// -// 2. Redistributions in binary form must reproduce the above copyright notice, this list -// of conditions and the following disclaimer in the documentation and/or other -// materials provided with the distribution. -// -// 3. Neither the name of the copyright holder nor the names of its contributors may be -// used to endorse or promote products derived from this software without specific -// prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY -// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL -// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF -// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// -// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers - -#include "checkpoints_create.h" -#include "common/dns_utils.h" -#include "include_base_utils.h" -#include <sstream> -#include <random> -#include "storages/portable_storage_template_helper.h" // epee json include - -namespace -{ - bool dns_records_match(const std::vector<std::string>& a, const std::vector<std::string>& b) - { - if (a.size() != b.size()) return false; - - for (const auto& record_in_a : a) - { - bool ok = false; - for (const auto& record_in_b : b) - { - if (record_in_a == record_in_b) - { - ok = true; - break; - } - } - if (!ok) return false; - } - - return true; - } -} // anonymous namespace - -namespace cryptonote -{ - -struct t_hashline -{ - uint64_t height; - std::string hash; - BEGIN_KV_SERIALIZE_MAP() - KV_SERIALIZE(height) - KV_SERIALIZE(hash) - END_KV_SERIALIZE_MAP() -}; - -struct t_hash_json { - std::vector<t_hashline> hashlines; - BEGIN_KV_SERIALIZE_MAP() - KV_SERIALIZE(hashlines) - END_KV_SERIALIZE_MAP() -}; - -bool create_checkpoints(cryptonote::checkpoints& checkpoints) -{ - ADD_CHECKPOINT(1, "771fbcd656ec1464d3a02ead5e18644030007a0fc664c0a964d30922821a8148"); - ADD_CHECKPOINT(10, "c0e3b387e47042f72d8ccdca88071ff96bff1ac7cde09ae113dbb7ad3fe92381"); - ADD_CHECKPOINT(100, "ac3e11ca545e57c49fca2b4e8c48c03c23be047c43e471e1394528b1f9f80b2d"); - ADD_CHECKPOINT(1000, "5acfc45acffd2b2e7345caf42fa02308c5793f15ec33946e969e829f40b03876"); - ADD_CHECKPOINT(10000, "c758b7c81f928be3295d45e230646de8b852ec96a821eac3fea4daf3fcac0ca2"); - ADD_CHECKPOINT(22231, "7cb10e29d67e1c069e6e11b17d30b809724255fee2f6868dc14cfc6ed44dfb25"); - ADD_CHECKPOINT(29556, "53c484a8ed91e4da621bb2fa88106dbde426fe90d7ef07b9c1e5127fb6f3a7f6"); - ADD_CHECKPOINT(50000, "0fe8758ab06a8b9cb35b7328fd4f757af530a5d37759f9d3e421023231f7b31c"); - ADD_CHECKPOINT(80000, "a62dcd7b536f22e003ebae8726e9e7276f63d594e264b6f0cd7aab27b66e75e3"); - ADD_CHECKPOINT(202612, "bbd604d2ba11ba27935e006ed39c9bfdd99b76bf4a50654bc1e1e61217962698"); - ADD_CHECKPOINT(202613, "e2aa337e78df1f98f462b3b1e560c6b914dec47b610698b7b7d1e3e86b6197c2"); - ADD_CHECKPOINT(202614, "c29e3dc37d8da3e72e506e31a213a58771b24450144305bcba9e70fa4d6ea6fb"); - ADD_CHECKPOINT(205000, "5d3d7a26e6dc7535e34f03def711daa8c263785f73ec1fadef8a45880fde8063"); - ADD_CHECKPOINT(220000, "9613f455933c00e3e33ac315cc6b455ee8aa0c567163836858c2d9caff111553"); - ADD_CHECKPOINT(230300, "bae7a80c46859db355556e3a9204a337ae8f24309926a1312323fdecf1920e61"); - ADD_CHECKPOINT(230700, "93e631240ceac831da1aebfc5dac8f722c430463024763ebafa888796ceaeedf"); - ADD_CHECKPOINT(231350, "b5add137199b820e1ea26640e5c3e121fd85faa86a1e39cf7e6cc097bdeb1131"); - ADD_CHECKPOINT(232150, "955de8e6b6508af2c24f7334f97beeea651d78e9ade3ab18fec3763be3201aa8"); - ADD_CHECKPOINT(249380, "654fb0a81ce3e5caf7e3264a70f447d4bd07586c08fa50f6638cc54da0a52b2d"); - ADD_CHECKPOINT(300000, "0c1cd46df6ccff90ec4ab493281f2583c344cd62216c427628990fe9db1bb8b6"); - ADD_CHECKPOINT(400000, "1b2b0e7a30e59691491529a3d506d1ba3d6052d0f6b52198b7330b28a6f1b6ac"); - ADD_CHECKPOINT(450000, "4d098b511ca97723e81737c448343cfd4e6dadb3d8a0e757c6e4d595e6e48357"); - ADD_CHECKPOINT(460000, "75037a7aed3e765db96c75bcf908f59d690a5f3390baebb9edeafd336a1c4831"); - ADD_CHECKPOINT(500000, "2428f0dbe49796be05ed81b347f53e1f7f44aed0abf641446ec2b94cae066b02"); - ADD_CHECKPOINT(600000, "f5828ebf7d7d1cb61762c4dfe3ccf4ecab2e1aad23e8113668d981713b7a54c5"); - ADD_CHECKPOINT(700000, "12be9b3d210b93f574d2526abb9c1ab2a881b479131fd0d4f7dac93875f503cd"); - ADD_CHECKPOINT(825000, "56503f9ad766774b575be3aff73245e9d159be88132c93d1754764f28da2ff60"); - ADD_CHECKPOINT(900000, "d9958d0e7dcf91a5a7b11de225927bf7efc6eb26240315ce12372be902cc1337"); - ADD_CHECKPOINT(913193, "5292d5d56f6ba4de33a58d9a34d263e2cb3c6fee0aed2286fd4ac7f36d53c85f"); - - return true; -} - -bool load_checkpoints_from_json(cryptonote::checkpoints& checkpoints, std::string json_hashfile_fullpath) -{ - boost::system::error_code errcode; - if (! (boost::filesystem::exists(json_hashfile_fullpath, errcode))) - { - LOG_PRINT_L1("Blockchain checkpoints file not found"); - return true; - } - - LOG_PRINT_L1("Adding checkpoints from blockchain hashfile"); - - uint64_t prev_max_height = checkpoints.get_max_height(); - LOG_PRINT_L1("Hard-coded max checkpoint height is " << prev_max_height); - t_hash_json hashes; - epee::serialization::load_t_from_json_file(hashes, json_hashfile_fullpath); - for (std::vector<t_hashline>::const_iterator it = hashes.hashlines.begin(); it != hashes.hashlines.end(); ) - { - uint64_t height; - height = it->height; - if (height <= prev_max_height) { - LOG_PRINT_L1("ignoring checkpoint height " << height); - } else { - std::string blockhash = it->hash; - LOG_PRINT_L1("Adding checkpoint height " << height << ", hash=" << blockhash); - ADD_CHECKPOINT(height, blockhash); - } - ++it; - } - - return true; -} - -bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints, bool testnet) -{ - // All four MoneroPulse domains have DNSSEC on and valid - static const std::vector<std::string> dns_urls = { "checkpoints.moneropulse.se" - , "checkpoints.moneropulse.org" - , "checkpoints.moneropulse.net" - , "checkpoints.moneropulse.co" - }; - - static const std::vector<std::string> testnet_dns_urls = { "testpoints.moneropulse.se" - , "testpoints.moneropulse.org" - , "testpoints.moneropulse.net" - , "testpoints.moneropulse.co" - }; - - std::vector<std::vector<std::string> > records; - records.resize(dns_urls.size()); - - std::random_device rd; - std::mt19937 gen(rd()); - std::uniform_int_distribution<int> dis(0, dns_urls.size() - 1); - size_t first_index = dis(gen); - - bool avail, valid; - size_t cur_index = first_index; - do - { - std::string url; - if (testnet) - { - url = testnet_dns_urls[cur_index]; - } - else - { - url = dns_urls[cur_index]; - } - - records[cur_index] = tools::DNSResolver::instance().get_txt_record(url, avail, valid); - if (!avail) - { - records[cur_index].clear(); - LOG_PRINT_L2("DNSSEC not available for checkpoint update at URL: " << url << ", skipping."); - } - if (!valid) - { - records[cur_index].clear(); - LOG_PRINT_L2("DNSSEC validation failed for checkpoint update at URL: " << url << ", skipping."); - } - - cur_index++; - if (cur_index == dns_urls.size()) - { - cur_index = 0; - } - records[cur_index].clear(); - } while (cur_index != first_index); - - size_t num_valid_records = 0; - - for( const auto& record_set : records) - { - if (record_set.size() != 0) - { - num_valid_records++; - } - } - - if (num_valid_records < 2) - { - LOG_PRINT_L0("WARNING: no two valid MoneroPulse DNS checkpoint records were received"); - return true; - } - - int good_records_index = -1; - for (size_t i = 0; i < records.size() - 1; ++i) - { - if (records[i].size() == 0) continue; - - for (size_t j = i + 1; j < records.size(); ++j) - { - if (dns_records_match(records[i], records[j])) - { - good_records_index = i; - break; - } - } - if (good_records_index >= 0) break; - } - - if (good_records_index < 0) - { - LOG_PRINT_L0("WARNING: no two MoneroPulse DNS checkpoint records matched"); - return true; - } - - for (auto& record : records[good_records_index]) - { - auto pos = record.find(":"); - if (pos != std::string::npos) - { - uint64_t height; - crypto::hash hash; - - // parse the first part as uint64_t, - // if this fails move on to the next record - std::stringstream ss(record.substr(0, pos)); - if (!(ss >> height)) - { - continue; - } - - // parse the second part as crypto::hash, - // if this fails move on to the next record - std::string hashStr = record.substr(pos + 1); - if (!epee::string_tools::parse_tpod_from_hex_string(hashStr, hash)) - { - continue; - } - - ADD_CHECKPOINT(height, hashStr); - } - } - return true; -} - -bool load_new_checkpoints(cryptonote::checkpoints& checkpoints, std::string json_hashfile_fullpath) -{ - // TODO: replace hard-coded url with const string or #define - return (load_checkpoints_from_json(checkpoints, json_hashfile_fullpath) && load_checkpoints_from_dns(checkpoints)); -} - -} // namespace cryptonote diff --git a/src/cryptonote_core/checkpoints_create.h b/src/cryptonote_core/checkpoints_create.h deleted file mode 100644 index 83830f8a2..000000000 --- a/src/cryptonote_core/checkpoints_create.h +++ /dev/null @@ -1,48 +0,0 @@ -// Copyright (c) 2014-2016, The Monero Project -// -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without modification, are -// permitted provided that the following conditions are met: -// -// 1. Redistributions of source code must retain the above copyright notice, this list of -// conditions and the following disclaimer. -// -// 2. Redistributions in binary form must reproduce the above copyright notice, this list -// of conditions and the following disclaimer in the documentation and/or other -// materials provided with the distribution. -// -// 3. Neither the name of the copyright holder nor the names of its contributors may be -// used to endorse or promote products derived from this software without specific -// prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY -// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL -// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF -// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// -// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers - -#pragma once - -#include "checkpoints.h" -#include "misc_log_ex.h" - -#define ADD_CHECKPOINT(h, hash) CHECK_AND_ASSERT(checkpoints.add_checkpoint(h, hash), false); -#define JSON_HASH_FILE_NAME "checkpoints.json" - -namespace cryptonote -{ - - bool create_checkpoints(cryptonote::checkpoints& checkpoints); - - bool load_checkpoints_from_json(cryptonote::checkpoints& checkpoints, std::string json_hashfile_fullpath); - bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints, bool testnet = false); - bool load_new_checkpoints(cryptonote::checkpoints& checkpoints, std::string json_hashfile_fullpath); - -} // namespace cryptonote diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp index 6f0fe88a4..c31be5acf 100644 --- a/src/cryptonote_core/cryptonote_core.cpp +++ b/src/cryptonote_core/cryptonote_core.cpp @@ -42,7 +42,7 @@ using namespace epee; #include "cryptonote_format_utils.h" #include "misc_language.h" #include <csignal> -#include "cryptonote_core/checkpoints_create.h" +#include "cryptonote_core/checkpoints.h" #include "blockchain_db/blockchain_db.h" #include "blockchain_db/lmdb/db_lmdb.h" #if defined(BERKELEY_DB) @@ -159,7 +159,7 @@ namespace cryptonote if (!m_testnet && !m_fakechain) { cryptonote::checkpoints checkpoints; - if (!cryptonote::create_checkpoints(checkpoints)) + if (!checkpoints.init_default_checkpoints()) { throw std::runtime_error("Failed to initialize checkpoints"); } @@ -415,7 +415,7 @@ namespace cryptonote CHECK_AND_ASSERT_MES(update_checkpoints(), false, "One or more checkpoints loaded from json or dns conflicted with existing checkpoints."); r = m_miner.init(vm, m_testnet); - CHECK_AND_ASSERT_MES(r, false, "Failed to initialize blockchain storage"); + CHECK_AND_ASSERT_MES(r, false, "Failed to initialize miner instance"); return load_state_data(); } @@ -634,11 +634,6 @@ namespace cryptonote return m_blockchain_storage.get_total_transactions(); } //----------------------------------------------------------------------------------------------- - //bool core::get_outs(uint64_t amount, std::list<crypto::public_key>& pkeys) - //{ - // return m_blockchain_storage.get_outs(amount, pkeys); - //} - //----------------------------------------------------------------------------------------------- bool core::add_new_tx(const transaction& tx, const crypto::hash& tx_hash, const crypto::hash& tx_prefix_hash, size_t blob_size, tx_verification_context& tvc, bool keeped_by_block, bool relayed) { if(m_mempool.have_tx(tx_hash)) @@ -770,10 +765,6 @@ namespace cryptonote { m_miner.on_synchronized(); } - //bool core::get_backward_blocks_sizes(uint64_t from_height, std::vector<size_t>& sizes, size_t count) - //{ - // return m_blockchain_storage.get_backward_blocks_sizes(from_height, sizes, count); - //} //----------------------------------------------------------------------------------------------- bool core::add_new_block(const block& b, block_verification_context& bvc) { @@ -894,10 +885,6 @@ namespace cryptonote return m_blockchain_storage.get_block_by_hash(h, blk); } //----------------------------------------------------------------------------------------------- - //void core::get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid) { - // m_blockchain_storage.get_all_known_block_ids(main, alt, invalid); - //} - //----------------------------------------------------------------------------------------------- std::string core::print_pool(bool short_format) const { return m_mempool.print_pool(short_format); diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h index 32f0b2ad4..30384209f 100644 --- a/src/cryptonote_core/cryptonote_core.h +++ b/src/cryptonote_core/cryptonote_core.h @@ -63,157 +63,739 @@ namespace cryptonote /************************************************************************/ /* */ /************************************************************************/ + + /** + * @brief handles core cryptonote functionality + * + * This class coordinates cryptonote functionality including, but not + * limited to, communication among the Blockchain, the transaction pool, + * any miners, and the network. + */ class core: public i_miner_handler { public: + + /** + * @brief constructor + * + * sets member variables into a usable state + * + * @param pprotocol pre-constructed protocol object to store and use + */ core(i_cryptonote_protocol* pprotocol); + + /** + * @copydoc Blockchain::handle_get_objects + * + * @note see Blockchain::handle_get_objects() + * @param context connection context associated with the request + */ bool handle_get_objects(NOTIFY_REQUEST_GET_OBJECTS::request& arg, NOTIFY_RESPONSE_GET_OBJECTS::request& rsp, cryptonote_connection_context& context); + + /** + * @brief calls various idle routines + * + * @note see miner::on_idle and tx_memory_pool::on_idle + * + * @return true + */ bool on_idle(); + + /** + * @brief handles an incoming transaction + * + * Parses an incoming transaction and, if nothing is obviously wrong, + * passes it along to the transaction pool + * + * @param tx_blob the tx to handle + * @param tvc metadata about the transaction's validity + * @param keeped_by_block if the transaction has been in a block + * @param relayed whether or not the transaction was relayed to us + * + * @return true if the transaction made it to the transaction pool, otherwise false + */ bool handle_incoming_tx(const blobdata& tx_blob, tx_verification_context& tvc, bool keeped_by_block, bool relayed); + + /** + * @brief handles an incoming block + * + * periodic update to checkpoints is triggered here + * Attempts to add the block to the Blockchain and, on success, + * optionally updates the miner's block template. + * + * @param block_blob the block to be added + * @param bvc return-by-reference metadata context about the block's validity + * @param update_miner_blocktemplate whether or not to update the miner's block template + * + * @return false if loading new checkpoints fails, or the block is not + * added, otherwise true + */ bool handle_incoming_block(const blobdata& block_blob, block_verification_context& bvc, bool update_miner_blocktemplate = true); + + /** + * @copydoc Blockchain::prepare_handle_incoming_blocks + * + * @note see Blockchain::prepare_handle_incoming_blocks + */ bool prepare_handle_incoming_blocks(const std::list<block_complete_entry> &blocks); - bool cleanup_handle_incoming_blocks(bool force_sync = false); + /** + * @copydoc Blockchain::cleanup_handle_incoming_blocks + * + * @note see Blockchain::cleanup_handle_incoming_blocks + */ + bool cleanup_handle_incoming_blocks(bool force_sync = false); + + /** + * @brief check the size of a block against the current maximum + * + * @param block_blob the block to check + * + * @return whether or not the block is too big + */ bool check_incoming_block_size(const blobdata& block_blob) const; + + /** + * @brief get the cryptonote protocol instance + * + * @return the instance + */ i_cryptonote_protocol* get_protocol(){return m_pprotocol;} //-------------------- i_miner_handler ----------------------- + + /** + * @brief stores and relays a block found by a miner + * + * Updates the miner's target block, attempts to store the found + * block in Blockchain, and -- on success -- relays that block to + * the network. + * + * @param b the block found + * + * @return true if the block was added to the main chain, otherwise false + */ virtual bool handle_block_found( block& b); + + /** + * @copydoc Blockchain::create_block_template + * + * @note see Blockchain::create_block_template + */ virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, const blobdata& ex_nonce); + /** + * @brief gets the miner instance + * + * @return a reference to the miner instance + */ miner& get_miner(){return m_miner;} + + /** + * @brief gets the miner instance (const) + * + * @return a const reference to the miner instance + */ const miner& get_miner()const{return m_miner;} + + /** + * @brief adds command line options to the given options set + * + * As of now, there are no command line options specific to core, + * so this function simply returns. + * + * @param desc return-by-reference the command line options set to add to + */ static void init_options(boost::program_options::options_description& desc); + + /** + * @brief initializes the core as needed + * + * This function initializes the transaction pool, the Blockchain, and + * a miner instance with parameters given on the command line (or defaults) + * + * @param vm command line parameters + * @param test_options configuration options for testing + * + * @return false if one of the init steps fails, otherwise true + */ bool init(const boost::program_options::variables_map& vm, const test_options *test_options = NULL); + + /** + * @copydoc Blockchain::reset_and_set_genesis_block + * + * @note see Blockchain::reset_and_set_genesis_block + */ bool set_genesis_block(const block& b); + + /** + * @brief performs safe shutdown steps for core and core components + * + * Uninitializes the miner instance, transaction pool, and Blockchain + * + * if m_fast_exit is set, the call to Blockchain::deinit() is not made. + * + * @return true + */ bool deinit(); + + /** + * @brief sets fast exit flag + * + * @note see deinit() + */ static void set_fast_exit(); + + /** + * @brief gets the current state of the fast exit flag + * + * @return the fast exit flag + * + * @note see deinit() + */ static bool get_fast_exit(); + + /** + * @brief sets to drop blocks downloaded (for testing) + */ void test_drop_download(); + + /** + * @brief sets to drop blocks downloaded below a certain height + * + * @param height height below which to drop blocks + */ void test_drop_download_height(uint64_t height); + + /** + * @brief gets whether or not to drop blocks (for testing) + * + * @return whether or not to drop blocks + */ bool get_test_drop_download() const; + + /** + * @brief gets whether or not to drop blocks + * + * If the current blockchain height <= our block drop threshold + * and test drop blocks is set, return true + * + * @return see above + */ bool get_test_drop_download_height() const; + + /** + * @copydoc Blockchain::get_current_blockchain_height + * + * @note see Blockchain::get_current_blockchain_height() + */ uint64_t get_current_blockchain_height() const; - bool get_blockchain_top(uint64_t& heeight, crypto::hash& top_id) const; + + /** + * @brief get the hash and height of the most recent block + * + * @param height return-by-reference height of the block + * @param top_id return-by-reference hash of the block + * + * @return true + */ + 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 + * + * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<block>&, std::list<transaction>&) const + */ bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks, std::list<transaction>& txs) const; + + /** + * @copydoc Blockchain::get_blocks(uint64_t, size_t, std::list<block>&) const + * + * @note see Blockchain::get_blocks(uint64_t, size_t, std::list<block>&) const + */ bool get_blocks(uint64_t start_offset, size_t count, std::list<block>& blocks) const; + + /** + * @copydoc Blockchain::get_blocks(const t_ids_container&, t_blocks_container&, t_missed_container&) const + * + * @note see Blockchain::get_blocks(const t_ids_container&, t_blocks_container&, t_missed_container&) const + */ template<class t_ids_container, class t_blocks_container, class t_missed_container> bool get_blocks(const t_ids_container& block_ids, t_blocks_container& blocks, t_missed_container& missed_bs) const { return m_blockchain_storage.get_blocks(block_ids, blocks, missed_bs); } + + /** + * @copydoc Blockchain::get_block_id_by_height + * + * @note see Blockchain::get_block_id_by_height + */ 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<transaction>& txs, std::list<crypto::hash>& missed_txs) const; + + /** + * @copydoc Blockchain::get_block_by_hash + * + * @note see Blockchain::get_block_by_hash + */ bool get_block_by_hash(const crypto::hash &h, block &blk) const; - //void get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid); + /** + * @copydoc Blockchain::get_alternative_blocks + * + * @note see Blockchain::get_alternative_blocks(std::list<block>&) const + */ bool get_alternative_blocks(std::list<block>& blocks) const; + + /** + * @copydoc Blockchain::get_alternative_blocks_count + * + * @note see Blockchain::get_alternative_blocks_count() const + */ size_t get_alternative_blocks_count() const; + /** + * @brief set the pointer to the cryptonote protocol object to use + * + * @param pprotocol the pointer to set ours as + */ void set_cryptonote_protocol(i_cryptonote_protocol* pprotocol); + + /** + * @copydoc Blockchain::set_checkpoints + * + * @note see Blockchain::set_checkpoints() + */ void set_checkpoints(checkpoints&& chk_pts); + + /** + * @brief set the file path to read from when loading checkpoints + * + * @param path the path to set ours as + */ void set_checkpoints_file_path(const std::string& path); + + /** + * @brief set whether or not we enforce DNS checkpoints + * + * @param enforce_dns enforce DNS checkpoints or not + */ void set_enforce_dns_checkpoints(bool enforce_dns); + /** + * @copydoc tx_memory_pool::get_transactions + * + * @note see tx_memory_pool::get_transactions + */ bool get_pool_transactions(std::list<transaction>& txs) const; + + /** + * @copydoc tx_memory_pool::get_pool_transactions_and_spent_keys_info + * + * @note see tx_memory_pool::get_pool_transactions_and_spent_keys_info + */ bool get_pool_transactions_and_spent_keys_info(std::vector<tx_info>& tx_infos, std::vector<spent_key_image_info>& key_image_infos) const; + + /** + * @copydoc tx_memory_pool::get_transactions_count + * + * @note see tx_memory_pool::get_transactions_count + */ size_t get_pool_transactions_count() const; + + /** + * @copydoc Blockchain::get_total_transactions + * + * @note see Blockchain::get_total_transactions + */ size_t get_blockchain_total_transactions() const; - //bool get_outs(uint64_t amount, std::list<crypto::public_key>& pkeys); + + /** + * @copydoc Blockchain::have_block + * + * @note see Blockchain::have_block + */ bool have_block(const crypto::hash& id) const; + + /** + * @copydoc Blockchain::get_short_chain_history + * + * @note see Blockchain::get_short_chain_history + */ bool get_short_chain_history(std::list<crypto::hash>& ids) const; + + /** + * @copydoc Blockchain::find_blockchain_supplement(const std::list<crypto::hash>&, NOTIFY_RESPONSE_CHAIN_ENTRY::request&) const + * + * @note see Blockchain::find_blockchain_supplement(const std::list<crypto::hash>&, NOTIFY_RESPONSE_CHAIN_ENTRY::request&) const + */ 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 + * + * @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 + */ 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; + + /** + * @brief gets some stats about the daemon + * + * @param st_inf return-by-reference container for the stats requested + * + * @return true + */ bool get_stat_info(core_stat_info& st_inf) const; - //bool get_backward_blocks_sizes(uint64_t from_height, std::vector<size_t>& sizes, size_t count); + + /** + * @copydoc Blockchain::get_tx_outputs_gindexs + * + * @note see Blockchain::get_tx_outputs_gindexs + */ bool get_tx_outputs_gindexs(const crypto::hash& tx_id, std::vector<uint64_t>& indexs) const; + + /** + * @copydoc Blockchain::get_tail_id + * + * @note see Blockchain::get_tail_id + */ crypto::hash get_tail_id() const; + + /** + * @copydoc Blockchain::get_random_outs_for_amounts + * + * @note see Blockchain::get_random_outs_for_amounts + */ bool get_random_outs_for_amounts(const COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request& req, COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response& res) const; + + + /** + * @copydoc miner::pause + * + * @note see miner::pause + */ void pause_mine(); + + /** + * @copydoc miner::resume + * + * @note see miner::resume + */ void resume_mine(); + #if BLOCKCHAIN_DB == DB_LMDB + /** + * @brief gets the Blockchain instance + * + * @return a reference to the Blockchain instance + */ Blockchain& get_blockchain_storage(){return m_blockchain_storage;} + + /** + * @brief gets the Blockchain instance (const) + * + * @return a const reference to the Blockchain instance + */ const Blockchain& get_blockchain_storage()const{return m_blockchain_storage;} #else blockchain_storage& get_blockchain_storage(){return m_blockchain_storage;} const blockchain_storage& get_blockchain_storage()const{return m_blockchain_storage;} #endif - //debug functions + + /** + * @copydoc Blockchain::print_blockchain + * + * @note see Blockchain::print_blockchain + */ void print_blockchain(uint64_t start_index, uint64_t end_index) const; + + /** + * @copydoc Blockchain::print_blockchain_index + * + * @note see Blockchain::print_blockchain_index + */ void print_blockchain_index() const; + + /** + * @copydoc tx_memory_pool::print_pool + * + * @note see tx_memory_pool::print_pool + */ std::string print_pool(bool short_format) const; + + /** + * @copydoc Blockchain::print_blockchain_outs + * + * @note see Blockchain::print_blockchain_outs + */ void print_blockchain_outs(const std::string& file); + + /** + * @copydoc miner::on_synchronized + * + * @note see miner::on_synchronized + */ void on_synchronized(); + /** + * @brief sets the target blockchain height + * + * @param target_blockchain_height the height to set + */ void set_target_blockchain_height(uint64_t target_blockchain_height); + + /** + * @brief gets the target blockchain height + * + * @param target_blockchain_height the target height + */ uint64_t get_target_blockchain_height() const; + /** + * @brief tells the Blockchain to update its checkpoints + * + * This function will check if enough time has passed since the last + * time checkpoints were updated and tell the Blockchain to update + * its checkpoints if it is time. If updating checkpoints fails, + * the daemon is told to shut down. + * + * @note see Blockchain::update_checkpoints() + */ bool update_checkpoints(); + /** + * @brief tells the daemon to wind down operations and stop running + * + * Currently this function raises SIGTERM, allowing the installed signal + * handlers to do the actual stopping. + */ + void graceful_exit(); + + /** + * @brief stops the daemon running + * + * @note see graceful_exit() + */ void stop(); + /** + * @copydoc Blockchain::have_tx_keyimg_as_spent + * + * @note see Blockchain::have_tx_keyimg_as_spent + */ bool is_key_image_spent(const crypto::key_image& key_im) const; + + /** + * @brief check if multiple key images are spent + * + * plural version of is_key_image_spent() + * + * @param key_im list of key images to check + * @param spent return-by-reference result for each image checked + * + * @return true + */ bool are_key_images_spent(const std::vector<crypto::key_image>& key_im, std::vector<bool> &spent) const; private: + + /** + * @copydoc add_new_tx(const transaction&, tx_verification_context&, bool) + * + * @param tx_hash the transaction's hash + * @param tx_prefix_hash the transaction prefix' hash + * @param blob_size the size of the transaction + * @param relayed whether or not the transaction was relayed to us + * + */ bool add_new_tx(const transaction& tx, const crypto::hash& tx_hash, const crypto::hash& tx_prefix_hash, size_t blob_size, tx_verification_context& tvc, bool keeped_by_block, bool relayed); + + /** + * @brief add a new transaction to the transaction pool + * + * Adds a new transaction to the transaction pool. + * + * @param tx the transaction to add + * @param tvc return-by-reference metadata about the transaction's verification process + * @param keeped_by_block whether or not the transaction has been in a block + * @param relayed whether or not the transaction was relayed to us + * + * @return true if the transaction is already in the transaction pool, + * is already in a block on the Blockchain, or is successfully added + * to the transaction pool + */ bool add_new_tx(const transaction& tx, tx_verification_context& tvc, bool keeped_by_block, bool relayed); + + /** + * @copydoc Blockchain::add_new_block + * + * @note see Blockchain::add_new_block + */ bool add_new_block(const block& b, block_verification_context& bvc); + + /** + * @brief load any core state stored on disk + * + * currently does nothing, but may have state to load in the future. + * + * @return true + */ bool load_state_data(); + + /** + * @copydoc parse_tx_from_blob(transaction&, crypto::hash&, crypto::hash&, const blobdata&) const + * + * @note see parse_tx_from_blob(transaction&, crypto::hash&, crypto::hash&, const blobdata&) const + */ bool parse_tx_from_blob(transaction& tx, crypto::hash& tx_hash, crypto::hash& tx_prefix_hash, const blobdata& blob) const; + /** + * @brief check a transaction's syntax + * + * For now this does nothing, but it may check something about the tx + * in the future. + * + * @param tx the transaction to check + * + * @return true + */ bool check_tx_syntax(const transaction& tx) const; - //check correct values, amounts and all lightweight checks not related with database + + /** + * @brief validates some simple properties of a transaction + * + * Currently checks: tx has inputs, + * tx inputs all of supported type(s), + * tx outputs valid (type, key, amount), + * input and output total amounts don't overflow, + * output amount <= input amount, + * tx not too large, + * each input has a different key image. + * + * @param tx the transaction to check + * @param keeped_by_block if the transaction has been in a block + * + * @return true if all the checks pass, otherwise false + */ bool check_tx_semantic(const transaction& tx, bool keeped_by_block) const; - //check if tx already in memory pool or in main blockchain - bool check_tx_ring_signature(const txin_to_key& tx, const crypto::hash& tx_prefix_hash, const std::vector<crypto::signature>& sig) const; - bool is_tx_spendtime_unlocked(uint64_t unlock_time) const; + /** + * @copydoc miner::on_block_chain_update + * + * @note see miner::on_block_chain_update + * + * @return true + */ bool update_miner_block_template(); + + /** + * @brief act on a set of command line options given + * + * @param vm the command line options + * + * @return true + */ bool handle_command_line(const boost::program_options::variables_map& vm); - bool on_update_blocktemplate_interval(); + + /** + * @brief verify that each input key image in a transaction is unique + * + * @param tx the transaction to check + * + * @return false if any key image is repeated, otherwise true + */ bool check_tx_inputs_keyimages_diff(const transaction& tx) const; - void graceful_exit(); + + /** + * @brief checks HardFork status and prints messages about it + * + * Checks the status of HardFork and logs/prints if an update to + * the daemon is necessary. + * + * @note see Blockchain::get_hard_fork_state and HardFork::State + * + * @return true + */ bool check_fork_time(); + + /** + * @brief attempts to relay any transactions in the mempool which need it + * + * @return true + */ bool relay_txpool_transactions(); + + /** + * @brief locks a file in the BlockchainDB directory + * + * @param path the directory in which to place the file + * + * @return true if lock acquired successfully, otherwise false + */ bool lock_db_directory(const boost::filesystem::path &path); + + /** + * @brief unlocks the db directory + * + * @note see lock_db_directory() + * + * @return true + */ bool unlock_db_directory(); - static std::atomic<bool> m_fast_exit; - bool m_test_drop_download = true; - uint64_t m_test_drop_download_height = 0; + static std::atomic<bool> m_fast_exit; //!< whether or not to deinit Blockchain on exit + + bool m_test_drop_download = true; //!< whether or not to drop incoming blocks (for testing) - tx_memory_pool m_mempool; + 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 #if BLOCKCHAIN_DB == DB_LMDB - Blockchain m_blockchain_storage; + Blockchain m_blockchain_storage; //!< Blockchain instance #else blockchain_storage m_blockchain_storage; #endif - i_cryptonote_protocol* m_pprotocol; - epee::critical_section m_incoming_tx_lock; + + i_cryptonote_protocol* m_pprotocol; //!< cryptonote protocol instance + + epee::critical_section m_incoming_tx_lock; //!< incoming transaction lock + //m_miner and m_miner_addres are probably temporary here - miner m_miner; - account_public_address m_miner_address; - std::string m_config_folder; - cryptonote_protocol_stub m_protocol_stub; - epee::math_helper::once_a_time_seconds<60*60*12, false> m_store_blockchain_interval; - epee::math_helper::once_a_time_seconds<60*60*2, true> m_fork_moaner; + miner m_miner; //!< miner instance + account_public_address m_miner_address; //!< address to mine to (for miner instance) + + std::string m_config_folder; //!< folder to look in for configs and other files + + cryptonote_protocol_stub m_protocol_stub; //!< cryptonote protocol stub instance + + epee::math_helper::once_a_time_seconds<60*60*12, false> m_store_blockchain_interval; //!< interval for manual storing of Blockchain, if enabled + epee::math_helper::once_a_time_seconds<60*60*2, false> m_fork_moaner; //!< interval for checking HardFork status epee::math_helper::once_a_time_seconds<60*2, false> m_txpool_auto_relayer; //!< interval for checking re-relaying txpool transactions + friend class tx_validate_inputs; - std::atomic<bool> m_starter_message_showed; + std::atomic<bool> m_starter_message_showed; //!< has the "daemon will sync now" message been shown? + + uint64_t m_target_blockchain_height; //!< blockchain height target + + bool m_testnet; //!< are we on testnet? - uint64_t m_target_blockchain_height; + bool m_fakechain; //!< are we using a fake chain (for testing purposes)? - bool m_testnet; - bool m_fakechain; - std::string m_checkpoints_path; - time_t m_last_dns_checkpoints_update; - time_t m_last_json_checkpoints_update; + std::string m_checkpoints_path; //!< path to json checkpoints file + time_t m_last_dns_checkpoints_update; //!< time when dns checkpoints were last updated + time_t m_last_json_checkpoints_update; //!< time when json checkpoints were last updated - std::atomic_flag m_checkpoints_updating; + std::atomic_flag m_checkpoints_updating; //!< set if checkpoints are currently updating to avoid multiple threads attempting to update at once - boost::interprocess::file_lock db_lock; + boost::interprocess::file_lock db_lock; //!< a lock object for a file lock in the db directory }; } diff --git a/src/cryptonote_core/difficulty.cpp b/src/cryptonote_core/difficulty.cpp index 236e84481..54da77392 100644 --- a/src/cryptonote_core/difficulty.cpp +++ b/src/cryptonote_core/difficulty.cpp @@ -116,8 +116,8 @@ namespace cryptonote { return !carry; } - difficulty_type next_difficulty(vector<uint64_t> timestamps, vector<difficulty_type> cumulative_difficulties, size_t target_seconds) { - //cutoff DIFFICULTY_LAG + difficulty_type next_difficulty(std::vector<std::uint64_t> timestamps, std::vector<difficulty_type> cumulative_difficulties, size_t target_seconds) { + if(timestamps.size() > DIFFICULTY_WINDOW) { timestamps.resize(DIFFICULTY_WINDOW); @@ -151,6 +151,8 @@ namespace cryptonote { assert(total_work > 0); uint64_t low, high; mul(total_work, target_seconds, low, high); + // blockchain errors "difficulty overhead" if this function returns zero. + // TODO: consider throwing an exception instead if (high != 0 || low + time_span - 1 < low) { return 0; } diff --git a/src/cryptonote_core/difficulty.h b/src/cryptonote_core/difficulty.h index d49c2f3b8..910f97035 100644 --- a/src/cryptonote_core/difficulty.h +++ b/src/cryptonote_core/difficulty.h @@ -39,6 +39,18 @@ namespace cryptonote { typedef std::uint64_t difficulty_type; + /** + * @brief checks if a hash fits the given difficulty + * + * The hash passes if (hash * difficulty) < 2^192. + * Phrased differently, if (hash * difficulty) fits without overflow into + * the least significant 192 bits of the 256 bit multiplication result. + * + * @param hash the hash to check + * @param difficulty the difficulty to check against + * + * @return true if valid, else false + */ bool check_hash(const crypto::hash &hash, difficulty_type difficulty); difficulty_type next_difficulty(std::vector<std::uint64_t> timestamps, std::vector<difficulty_type> cumulative_difficulties, size_t target_seconds); } diff --git a/src/daemon/core.h b/src/daemon/core.h index 2208ef25a..2b7f0d177 100644 --- a/src/daemon/core.h +++ b/src/daemon/core.h @@ -28,7 +28,6 @@ #pragma once -#include "cryptonote_core/checkpoints_create.h" #include "cryptonote_core/cryptonote_core.h" #include "cryptonote_protocol/cryptonote_protocol_handler.h" #include "misc_log_ex.h" |