134 lines
4.3 KiB
C++
134 lines
4.3 KiB
C++
// Copyright (c) 2011-2016 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#pragma once
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#include "INode.h"
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#include "SynchronizationState.h"
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#include "IBlockchainSynchronizer.h"
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#include "IObservableImpl.h"
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#include "IStreamSerializable.h"
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#include <condition_variable>
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#include <mutex>
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#include <atomic>
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#include <future>
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namespace CryptoNote {
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class BlockchainSynchronizer :
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public IObservableImpl<IBlockchainSynchronizerObserver, IBlockchainSynchronizer>,
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public INodeObserver {
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public:
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BlockchainSynchronizer(INode& node, const Crypto::Hash& genesisBlockHash);
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~BlockchainSynchronizer();
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// IBlockchainSynchronizer
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virtual void addConsumer(IBlockchainConsumer* consumer) override;
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virtual bool removeConsumer(IBlockchainConsumer* consumer) override;
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virtual IStreamSerializable* getConsumerState(IBlockchainConsumer* consumer) const override;
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virtual std::vector<Crypto::Hash> getConsumerKnownBlocks(IBlockchainConsumer& consumer) const override;
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virtual std::future<std::error_code> addUnconfirmedTransaction(const ITransactionReader& transaction) override;
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virtual std::future<void> removeUnconfirmedTransaction(const Crypto::Hash& transactionHash) override;
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virtual void start() override;
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virtual void stop() override;
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// IStreamSerializable
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virtual void save(std::ostream& os) override;
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virtual void load(std::istream& in) override;
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// INodeObserver
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virtual void localBlockchainUpdated(uint32_t height) override;
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virtual void lastKnownBlockHeightUpdated(uint32_t height) override;
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virtual void poolChanged() override;
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private:
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struct GetBlocksResponse {
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uint32_t startHeight;
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std::vector<BlockShortEntry> newBlocks;
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};
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struct GetBlocksRequest {
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GetBlocksRequest() {
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syncStart.timestamp = 0;
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syncStart.height = 0;
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}
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SynchronizationStart syncStart;
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std::vector<Crypto::Hash> knownBlocks;
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};
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struct GetPoolResponse {
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bool isLastKnownBlockActual;
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std::vector<std::unique_ptr<ITransactionReader>> newTxs;
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std::vector<Crypto::Hash> deletedTxIds;
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};
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struct GetPoolRequest {
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std::vector<Crypto::Hash> knownTxIds;
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Crypto::Hash lastKnownBlock;
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};
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enum class State { //prioritized finite states
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idle = 0, //DO
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poolSync = 1, //NOT
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blockchainSync = 2, //REORDER
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stopped = 3 //!!!
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};
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enum class UpdateConsumersResult {
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nothingChanged = 0,
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addedNewBlocks = 1,
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errorOccurred = 2
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};
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//void startSync();
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void startPoolSync();
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void startBlockchainSync();
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void processBlocks(GetBlocksResponse& response);
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UpdateConsumersResult updateConsumers(const BlockchainInterval& interval, const std::vector<CompleteBlock>& blocks);
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std::error_code processPoolTxs(GetPoolResponse& response);
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std::error_code getPoolSymmetricDifferenceSync(GetPoolRequest&& request, GetPoolResponse& response);
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std::error_code doAddUnconfirmedTransaction(const ITransactionReader& transaction);
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void doRemoveUnconfirmedTransaction(const Crypto::Hash& transactionHash);
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///second parameter is used only in case of errors returned into callback from INode, such as aborted or connection lost
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bool setFutureState(State s);
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bool setFutureStateIf(State s, std::function<bool(void)>&& pred);
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void actualizeFutureState();
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bool checkIfShouldStop() const;
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bool checkIfStopped() const;
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void workingProcedure();
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GetBlocksRequest getCommonHistory();
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void getPoolUnionAndIntersection(std::unordered_set<Crypto::Hash>& poolUnion, std::unordered_set<Crypto::Hash>& poolIntersection) const;
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SynchronizationState* getConsumerSynchronizationState(IBlockchainConsumer* consumer) const ;
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typedef std::map<IBlockchainConsumer*, std::shared_ptr<SynchronizationState>> ConsumersMap;
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ConsumersMap m_consumers;
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INode& m_node;
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const Crypto::Hash m_genesisBlockHash;
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Crypto::Hash lastBlockId;
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State m_currentState;
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State m_futureState;
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std::unique_ptr<std::thread> workingThread;
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std::list<std::pair<const ITransactionReader*, std::promise<std::error_code>>> m_addTransactionTasks;
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std::list<std::pair<const Crypto::Hash*, std::promise<void>>> m_removeTransactionTasks;
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mutable std::mutex m_consumersMutex;
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mutable std::mutex m_stateMutex;
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std::condition_variable m_hasWork;
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};
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}
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