storage.hpp

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#pragma once
 
#include <rocksdb/db.h>
#include <rocksdb/options.h>
#include <rocksdb/slice.h>
#include <rocksdb/write_batch.h>
 
#include <filesystem>
#include <functional>
#include <regex>
 
#include "common/types.hpp"
#include "dag/dag_block.hpp"
#include "logger/logging.hpp"
#include "pbft/pbft_block.hpp"
#include "pbft/period_data.hpp"
#include "pillar_chain/pillar_block.hpp"
#include "storage/uint_comparator.hpp"
#include "transaction/receipt.hpp"
#include "transaction/transaction.hpp"
#include "vote/pillar_vote.hpp"
#include "vote_manager/verified_votes.hpp"
 
namespace taraxa {
namespace fs = std::filesystem;
struct SortitionParamsChange;
 
namespace pillar_chain {
struct PillarBlockData;
class PillarBlock;
}  // namespace pillar_chain
 
enum StatusDbField : uint8_t {
  ExecutedBlkCount = 0,
  ExecutedTrxCount,
  TrxCount,
  DagBlkCount,
  DagEdgeCount,
  DbMajorVersion,
  DbMinorVersion
};
 
enum class PbftMgrField : uint8_t { Round = 0, Step };
 
enum PbftMgrStatus : uint8_t {
  ExecutedBlock = 0,
  ExecutedInRound,
  NextVotedSoftValue,
  NextVotedNullBlockHash,
};
 
enum class DBMetaKeys { LAST_NUMBER = 1 };
 
class DbException : public std::exception {
 public:
  explicit DbException(const std::string& desc) : desc_(desc) {}
  virtual ~DbException() = default;
 
  DbException(const DbException&) = default;
  DbException(DbException&&) = default;
  DbException& operator=(const DbException&) = delete;
  DbException& operator=(DbException&&) = delete;
 
  virtual const char* what() const noexcept { return desc_.c_str(); }
 
 private:
  const std::string desc_;
};
 
using Batch = rocksdb::WriteBatch;
using Slice = rocksdb::Slice;
using OnEntry = std::function<void(Slice const&, Slice const&)>;
 
class DbStorage : public std::enable_shared_from_this<DbStorage> {
 public:
  class Column {
    std::string const name_;
 
   public:
    size_t const ordinal_;
    const rocksdb::Comparator* comparator_;
 
    Column(std::string name, size_t ordinal, const rocksdb::Comparator* comparator)
        : name_(std::move(name)), ordinal_(ordinal), comparator_(comparator) {}
 
    Column(std::string name, size_t ordinal) : name_(std::move(name)), ordinal_(ordinal), comparator_(nullptr) {}
 
    auto const& name() const { return ordinal_ ? name_ : rocksdb::kDefaultColumnFamilyName; }
  };
 
  class Columns {
    static inline std::vector<Column> all_;
 
   public:
    static inline auto const& all = all_;
 
#define COLUMN(__name__) static inline auto const __name__ = all_.emplace_back(#__name__, all_.size())
#define COLUMN_W_COMP(__name__, ...) \
  static inline auto const __name__ = all_.emplace_back(#__name__, all_.size(), __VA_ARGS__)
 
    // do not change/move
    COLUMN(default_column);
    // migrations
    COLUMN(migrations);
    // Contains full data for an executed PBFT block including PBFT block, cert votes, dag blocks and transactions
    COLUMN_W_COMP(period_data, getIntComparator<PbftPeriod>());
    COLUMN(genesis);
    COLUMN(dag_blocks);
    COLUMN_W_COMP(dag_blocks_level, getIntComparator<uint64_t>());
    COLUMN(transactions);
    COLUMN(trx_period);
    COLUMN(status);
    COLUMN(pbft_mgr_round_step);
    COLUMN(pbft_mgr_status);
    COLUMN(cert_voted_block_in_round);  // Cert voted block + round -> node voted for this block
    COLUMN(proposed_pbft_blocks);       // Proposed pbft blocks
    COLUMN(pbft_head);
    COLUMN(latest_round_own_votes);             // own votes of any type for the latest round
    COLUMN(latest_round_two_t_plus_one_votes);  // 2t+1 votes bundles of any type for the latest round
    COLUMN(extra_reward_votes);                 // extra reward votes on top of 2t+1 cert votes bundle from
                                                // latest_round_two_t_plus_one_votes
    COLUMN(pbft_block_period);
    COLUMN(dag_block_period);
    COLUMN_W_COMP(proposal_period_levels_map, getIntComparator<uint64_t>());
    COLUMN(final_chain_meta);
    COLUMN(final_chain_blk_by_number);
    COLUMN(final_chain_blk_hash_by_number);
    COLUMN(final_chain_blk_number_by_hash);
    COLUMN(final_chain_receipt_by_trx_hash);
    COLUMN(final_chain_log_blooms_index);
    COLUMN_W_COMP(sortition_params_change, getIntComparator<PbftPeriod>());
 
    COLUMN_W_COMP(block_rewards_stats, getIntComparator<uint64_t>());
 
    // Finalized pillar blocks
    COLUMN_W_COMP(pillar_block, getIntComparator<PbftPeriod>());
    // Current pillar block data - current pillar block + current vote counts
    COLUMN(current_pillar_block_data);
    // Current pillar block own pillar vote
    COLUMN(current_pillar_block_own_vote);
    // system transactions that is not a part of the block
    COLUMN(system_transaction);
    // system transactions hashes by period
    COLUMN(period_system_transactions);
    // final chain receipts by period
    COLUMN_W_COMP(final_chain_receipt_by_period, getIntComparator<PbftPeriod>());
 
#undef COLUMN
#undef COLUMN_W_COMP
  };
 
  auto handle(Column const& col) const { return handles_[col.ordinal_]; }
  rocksdb::ReadOptions read_options_;
 
  rocksdb::WriteOptions async_write_;
  rocksdb::WriteOptions sync_write_;
 
 private:
  fs::path path_;
  fs::path db_path_;
  fs::path state_db_path_;
  const std::string kDbDir = "db";
  const std::string kStateDbDir = "state_db";
  std::unique_ptr<rocksdb::DB> db_;
  std::vector<rocksdb::ColumnFamilyHandle*> handles_;
  std::mutex dag_blocks_mutex_;
  std::atomic<uint64_t> dag_blocks_count_;
  std::atomic<uint64_t> dag_edge_count_;
  const uint32_t kDbSnapshotsEachNblock = 0;
  std::atomic<bool> snapshots_enabled_ = true;
  const uint32_t kDbSnapshotsMaxCount = 0;
  std::set<PbftPeriod> snapshots_;
 
  uint32_t kMajorVersion_;
  bool major_version_changed_ = false;
  bool minor_version_changed_ = false;
 
  logger::Logger logger_;
 
 public:
  explicit DbStorage(fs::path const& base_path, uint32_t db_snapshot_each_n_pbft_block = 0, uint32_t max_open_files = 0,
                     uint32_t db_max_snapshots = 0, PbftPeriod db_revert_to_period = 0, bool rebuild = false);
  ~DbStorage();
 
  DbStorage(const DbStorage&) = delete;
  DbStorage(DbStorage&&) = delete;
  DbStorage& operator=(const DbStorage&) = delete;
  DbStorage& operator=(DbStorage&&) = delete;
 
  auto const& path() const { return path_; }
  auto dbStoragePath() const { return db_path_; }
  auto stateDbStoragePath() const { return state_db_path_; }
  static Batch createWriteBatch();
  void commitWriteBatch(Batch& write_batch, const rocksdb::WriteOptions& opts);
  void commitWriteBatch(Batch& write_batch) { commitWriteBatch(write_batch, async_write_); }
 
  void rebuildColumns(const rocksdb::Options& options);
  bool createSnapshot(PbftPeriod period);
  void deleteSnapshot(PbftPeriod period);
  void recoverToPeriod(PbftPeriod period);
  void loadSnapshots();
  void disableSnapshots();
  void enableSnapshots();
  void updateDbVersions();
  void deleteColumnData(const Column& c);
 
  void replaceColumn(const Column& to_be_replaced_col, std::unique_ptr<rocksdb::ColumnFamilyHandle>&& replacing_col);
  std::unique_ptr<rocksdb::ColumnFamilyHandle> copyColumn(rocksdb::ColumnFamilyHandle* orig_column,
                                                          const std::string& new_col_name, bool move_data = false);
 
  // For removal of LOG.old.* files in the database
  void removeTempFiles() const;
  void removeFilesWithPattern(const std::string& directory, const std::regex& pattern) const;
  void deleteTmpDirectories(const std::string& path) const;
 
  uint32_t getMajorVersion() const;
  std::unique_ptr<rocksdb::Iterator> getColumnIterator(const Column& c);
  std::unique_ptr<rocksdb::Iterator> getColumnIterator(rocksdb::ColumnFamilyHandle* c);
 
  // Genesis
  void setGenesisHash(const h256& genesis_hash);
  std::optional<h256> getGenesisHash();
 
  // Period data
  void savePeriodData(const PeriodData& period_data, Batch& write_batch);
  void clearPeriodDataHistory(PbftPeriod period, uint64_t dag_level_to_keep, PbftPeriod last_block_number);
  dev::bytes getPeriodDataRaw(PbftPeriod period) const;
  std::optional<PeriodData> getPeriodData(PbftPeriod period) const;
  std::optional<PbftBlock> getPbftBlock(PbftPeriod period) const;
  std::vector<std::shared_ptr<PbftVote>> getPeriodCertVotes(PbftPeriod period) const;
  blk_hash_t getPeriodBlockHash(PbftPeriod period) const;
  SharedTransactions transactionsFromPeriodDataRlp(PbftPeriod period, const dev::RLP& period_data_rlp) const;
  std::optional<SharedTransactions> getPeriodTransactions(PbftPeriod period) const;
  std::vector<std::shared_ptr<PillarVote>> getPeriodPillarVotes(PbftPeriod period) const;
 
  // Pillar chain
  void savePillarBlock(const std::shared_ptr<pillar_chain::PillarBlock>& pillar_block);
  std::shared_ptr<pillar_chain::PillarBlock> getPillarBlock(PbftPeriod period) const;
  std::shared_ptr<pillar_chain::PillarBlock> getLatestPillarBlock() const;
  void saveOwnPillarBlockVote(const std::shared_ptr<PillarVote>& vote);
  std::shared_ptr<PillarVote> getOwnPillarBlockVote() const;
  void saveCurrentPillarBlockData(const pillar_chain::CurrentPillarBlockDataDb& current_pillar_block_data);
  std::optional<pillar_chain::CurrentPillarBlockDataDb> getCurrentPillarBlockData() const;
 
  // DAG
  void saveDagBlock(const std::shared_ptr<DagBlock>& blk, Batch* write_batch_p = nullptr);
  std::shared_ptr<DagBlock> getDagBlock(blk_hash_t const& hash);
  bool dagBlockInDb(blk_hash_t const& hash);
  std::set<blk_hash_t> getBlocksByLevel(level_t level);
  level_t getLastBlocksLevel() const;
  std::vector<std::shared_ptr<DagBlock>> getDagBlocksAtLevel(level_t level, int number_of_levels);
  void updateDagBlockCounters(std::vector<std::shared_ptr<DagBlock>> blks);
  std::map<level_t, std::vector<std::shared_ptr<DagBlock>>> getNonfinalizedDagBlocks();
  void removeDagBlockBatch(Batch& write_batch, blk_hash_t const& hash);
  void removeDagBlock(blk_hash_t const& hash);
  // Sortition params
  void saveSortitionParamsChange(PbftPeriod period, const SortitionParamsChange& params, Batch& batch);
  std::deque<SortitionParamsChange> getLastSortitionParams(size_t count);
  std::optional<SortitionParamsChange> getParamsChangeForPeriod(PbftPeriod period);
 
  // Transaction
  std::shared_ptr<Transaction> getTransaction(trx_hash_t const& hash) const;
  std::shared_ptr<Transaction> getTransaction(PbftPeriod period, uint32_t position) const;
 
  SharedTransactions getAllNonfinalizedTransactions();
  bool transactionInDb(trx_hash_t const& hash);
  bool transactionFinalized(trx_hash_t const& hash);
  std::vector<bool> transactionsInDb(std::vector<trx_hash_t> const& trx_hashes);
  std::vector<bool> transactionsFinalized(std::vector<trx_hash_t> const& trx_hashes);
  void addTransactionToBatch(Transaction const& trx, Batch& write_batch);
  void removeTransactionToBatch(trx_hash_t const& trx, Batch& write_batch);
 
  void addTransactionLocationToBatch(Batch& write_batch, trx_hash_t const& trx, PbftPeriod period, uint32_t position,
                                     bool is_system = false);
  std::optional<TransactionLocation> getTransactionLocation(trx_hash_t const& hash) const;
  std::unordered_map<trx_hash_t, PbftPeriod> getAllTransactionPeriod();
  uint64_t getTransactionCount(PbftPeriod period) const;
  SharedTransactionReceipts getBlockReceipts(PbftPeriod period) const;
  std::optional<TransactionReceipt> getTransactionReceipt(EthBlockNumber blk_n, uint64_t position) const;
 
  SharedTransactions getFinalizedTransactions(std::vector<trx_hash_t> const& trx_hashes) const;
 
  // System transaction
  void addSystemTransactionToBatch(Batch& write_batch, SharedTransaction trx);
  std::shared_ptr<Transaction> getSystemTransaction(const trx_hash_t& hash) const;
  void addPeriodSystemTransactions(Batch& write_batch, SharedTransactions trxs, PbftPeriod period);
  std::vector<trx_hash_t> getPeriodSystemTransactionsHashes(PbftPeriod period) const;
  SharedTransactions getPeriodSystemTransactions(PbftPeriod period) const;
 
  // PBFT manager
  uint32_t getPbftMgrField(PbftMgrField field);
  void savePbftMgrField(PbftMgrField field, uint32_t value);
  void addPbftMgrFieldToBatch(PbftMgrField field, uint32_t value, Batch& write_batch);
 
  bool getPbftMgrStatus(PbftMgrStatus field);
  void savePbftMgrStatus(PbftMgrStatus field, bool const& value);
  void addPbftMgrStatusToBatch(PbftMgrStatus field, bool const& value, Batch& write_batch);
 
  void saveCertVotedBlockInRound(PbftRound round, const std::shared_ptr<PbftBlock>& block);
  std::optional<std::pair<PbftRound, std::shared_ptr<PbftBlock>>> getCertVotedBlockInRound() const;
  void removeCertVotedBlockInRound(Batch& write_batch);
 
  // pbft_blocks
  std::optional<PbftBlock> getPbftBlock(blk_hash_t const& hash);
  bool pbftBlockInDb(blk_hash_t const& hash);
 
  // Proposed pbft blocks
  void saveProposedPbftBlock(const std::shared_ptr<PbftBlock>& block);
  void removeProposedPbftBlock(const blk_hash_t& block_hash, Batch& write_batch);
  std::vector<std::shared_ptr<PbftBlock>> getProposedPbftBlocks();
 
  // pbft_blocks (head)
  std::string getPbftHead(blk_hash_t const& hash);
  void savePbftHead(blk_hash_t const& hash, std::string const& pbft_chain_head_str);
  void addPbftHeadToBatch(taraxa::blk_hash_t const& head_hash, std::string const& head_str, Batch& write_batch);
 
  // status
  uint64_t getStatusField(StatusDbField const& field);
  void saveStatusField(StatusDbField const& field, uint64_t value);
  void addStatusFieldToBatch(StatusDbField const& field, uint64_t value, Batch& write_batch);
 
  // Own votes for the latest round
  void saveOwnVerifiedVote(const std::shared_ptr<PbftVote>& vote);
  std::vector<std::shared_ptr<PbftVote>> getOwnVerifiedVotes();
  void clearOwnVerifiedVotes(Batch& write_batch, const std::vector<std::shared_ptr<PbftVote>>& own_verified_votes);
 
  // 2t+1 votes bundles for the latest round
  void replaceTwoTPlusOneVotes(TwoTPlusOneVotedBlockType type, const std::vector<std::shared_ptr<PbftVote>>& votes);
  void replaceTwoTPlusOneVotesToBatch(TwoTPlusOneVotedBlockType type,
                                      const std::vector<std::shared_ptr<PbftVote>>& votes, Batch& write_batch);
  std::vector<std::shared_ptr<PbftVote>> getAllTwoTPlusOneVotes();
 
  // Reward votes - cert votes for the latest finalized block
  void removeExtraRewardVotes(const std::vector<vote_hash_t>& votes, Batch& write_batch);
  void saveExtraRewardVote(const std::shared_ptr<PbftVote>& vote);
  std::vector<std::shared_ptr<PbftVote>> getRewardVotes();
 
  // period_pbft_block
  void addPbftBlockPeriodToBatch(PbftPeriod period, taraxa::blk_hash_t const& pbft_block_hash, Batch& write_batch);
  std::pair<bool, PbftPeriod> getPeriodFromPbftHash(taraxa::blk_hash_t const& pbft_block_hash);
  // dag_block_period
  std::shared_ptr<std::pair<PbftPeriod, uint32_t>> getDagBlockPeriod(blk_hash_t const& hash);
  void addDagBlockPeriodToBatch(blk_hash_t const& hash, PbftPeriod period, uint32_t position, Batch& write_batch);
 
  uint64_t getDagBlocksCount() const { return dag_blocks_count_.load(); }
  uint64_t getDagEdgeCount() const { return dag_edge_count_.load(); }
 
  auto getNumTransactionExecuted() { return getStatusField(StatusDbField::ExecutedTrxCount); }
  auto getNumTransactionInDag() { return getStatusField(StatusDbField::TrxCount); }
  auto getNumBlockExecuted() { return getStatusField(StatusDbField::ExecutedBlkCount); }
 
  std::vector<blk_hash_t> getFinalizedDagBlockHashesByPeriod(PbftPeriod period);
  std::vector<std::shared_ptr<DagBlock>> getFinalizedDagBlockByPeriod(PbftPeriod period);
  std::pair<blk_hash_t, std::vector<std::shared_ptr<DagBlock>>> getLastPbftBlockHashAndFinalizedDagBlockByPeriod(
      PbftPeriod period);
 
  // DPOS level to proposal period map
  std::optional<uint64_t> getProposalPeriodForDagLevel(uint64_t level);
  void saveProposalPeriodDagLevelsMap(uint64_t level, PbftPeriod period);
  void addProposalPeriodDagLevelsMapToBatch(uint64_t level, PbftPeriod period, Batch& write_batch);
 
  bool hasMinorVersionChanged() { return minor_version_changed_; }
  bool hasMajorVersionChanged() { return major_version_changed_; }
 
  void compactColumn(Column const& column) { db_->CompactRange({}, handle(column), nullptr, nullptr); }
 
  inline static bytes asBytes(std::string const& b) {
    return bytes((byte const*)b.data(), (byte const*)(b.data() + b.size()));
  }
 
  template <typename T>
  inline static Slice make_slice(T const* begin, size_t size) {
    if (!size) {
      return {};
    }
    return {reinterpret_cast<char const*>(begin), size};
  }
 
  inline static Slice toSlice(dev::bytesConstRef const& b) { return make_slice(b.data(), b.size()); }
 
  template <unsigned N>
  inline static Slice toSlice(dev::FixedHash<N> const& h) {
    return make_slice(h.data(), N);
  }
 
  inline static Slice toSlice(dev::bytes const& b) { return make_slice(b.data(), b.size()); }
 
  template <class N>
  inline static auto toSlice(N const& n) -> std::enable_if_t<std::is_integral_v<N> || std::is_enum_v<N>, Slice> {
    return make_slice(&n, sizeof(N));
  }
 
  inline static Slice toSlice(std::string const& str) { return make_slice(str.data(), str.size()); }
 
  inline static auto const& toSlice(Slice const& s) { return s; }
 
  template <typename T>
  inline static auto toSlices(std::vector<T> const& keys) {
    std::vector<Slice> ret;
    ret.reserve(keys.size());
    for (auto const& k : keys) {
      ret.emplace_back(toSlice(k));
    }
    return ret;
  }
 
  inline static auto const& toSlices(std::vector<Slice> const& ss) { return ss; }
 
  template <typename K>
  std::string lookup(K const& key, Column const& column) const {
    std::string value;
    auto status = db_->Get(read_options_, handle(column), toSlice(key), &value);
    if (status.IsNotFound()) {
      return value;
    }
    checkStatus(status);
    return value;
  }
 
  template <typename Int, typename K>
  auto lookup_int(K const& key, Column const& column) -> std::enable_if_t<std::is_integral_v<Int>, std::optional<Int>> {
    auto str = lookup(key, column);
    if (str.empty()) {
      return std::nullopt;
    }
    return *reinterpret_cast<Int*>(str.data());
  }
 
  template <typename K>
  bool exist(K const& key, Column const& column) {
    std::string value;
    // KeyMayExist can lead to a few false positives, but not false negatives.
    if (db_->KeyMayExist(read_options_, handle(column), toSlice(key), &value)) {
      auto status = db_->Get(read_options_, handle(column), toSlice(key), &value);
      if (status.IsNotFound()) {
        return false;
      }
      checkStatus(status);
      return !value.empty();
    }
    return false;
  }
 
  static void checkStatus(rocksdb::Status const& status);
 
  template <typename K, typename V>
  void insert(rocksdb::ColumnFamilyHandle* col, const K& k, const V& v) {
    checkStatus(db_->Put(async_write_, col, toSlice(k), toSlice(v)));
  }
 
  template <typename K, typename V>
  void insert(Column const& col, K const& k, V const& v) {
    checkStatus(db_->Put(async_write_, handle(col), toSlice(k), toSlice(v)));
  }
 
  template <typename K, typename V>
  void insert(Batch& batch, Column const& col, K const& k, V const& v) {
    checkStatus(batch.Put(handle(col), toSlice(k), toSlice(v)));
  }
 
  template <typename K, typename V>
  void insert(Batch& batch, rocksdb::ColumnFamilyHandle* col, K const& k, V const& v) {
    checkStatus(batch.Put(col, toSlice(k), toSlice(v)));
  }
 
  template <typename K>
  void remove(Column const& col, K const& k) {
    checkStatus(db_->Delete(async_write_, handle(col), toSlice(k)));
  }
 
  template <typename K>
  void remove(Batch& batch, Column const& col, K const& k) {
    checkStatus(batch.Delete(handle(col), toSlice(k)));
  }
 
  void forEach(Column const& col, OnEntry const& f);
};
 
}  // namespace taraxa