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89 lines
3.6 KiB
89 lines
3.6 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file TransactionQueue.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#include <functional>
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#include <libdevcore/Common.h>
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#include <libdevcore/Guards.h>
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#include <libdevcore/Log.h>
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#include <libethcore/Common.h>
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#include "Transaction.h"
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namespace dev
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{
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namespace eth
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{
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class BlockChain;
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struct TransactionQueueChannel: public LogChannel { static const char* name(); static const int verbosity = 4; };
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#define ctxq dev::LogOutputStream<dev::eth::TransactionQueueChannel, true>()
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enum class IfDropped { Ignore, Retry };
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/**
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* @brief A queue of Transactions, each stored as RLP.
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* @threadsafe
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*/
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class TransactionQueue
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{
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public:
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using ImportCallback = std::function<void(ImportResult)>;
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ImportResult import(Transaction const& _tx, ImportCallback const& _cb = ImportCallback(), IfDropped _ik = IfDropped::Ignore);
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ImportResult import(bytes const& _tx, ImportCallback const& _cb = ImportCallback(), IfDropped _ik = IfDropped::Ignore) { return import(&_tx, _cb, _ik); }
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ImportResult import(bytesConstRef _tx, ImportCallback const& _cb = ImportCallback(), IfDropped _ik = IfDropped::Ignore);
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void drop(h256 const& _txHash);
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unsigned waiting(Address const& _a) const;
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std::unordered_map<h256, Transaction> transactions() const;
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std::pair<unsigned, unsigned> items() const { ReadGuard l(m_lock); return std::make_pair(m_current.size(), m_future.size()); }
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u256 maxNonce(Address const& _a) const;
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void setFuture(std::pair<h256, Transaction> const& _t);
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void noteGood(std::pair<h256, Transaction> const& _t);
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void clear() { WriteGuard l(m_lock); m_senders.clear(); m_known.clear(); m_current.clear(); m_future.clear(); }
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template <class T> Handler onReady(T const& _t) { return m_onReady.add(_t); }
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private:
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ImportResult check_WITH_LOCK(h256 const& _h, IfDropped _ik);
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ImportResult manageImport_WITH_LOCK(h256 const& _h, Transaction const& _transaction, ImportCallback const& _cb);
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void insertCurrent_WITH_LOCK(std::pair<h256, Transaction> const& _p);
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bool remove_WITH_LOCK(h256 const& _txHash);
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u256 maxNonce_WITH_LOCK(Address const& _a) const;
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mutable SharedMutex m_lock; ///< General lock.
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h256Hash m_known; ///< Hashes of transactions in both sets.
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std::unordered_multimap<Address, h256> m_senders; ///< Mapping from the sender address to the transaction hash; useful for determining the nonce of a given sender.
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std::unordered_map<h256, Transaction> m_current; ///< Map of SHA3(tx) to tx.
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std::unordered_map<h256, Transaction> m_future; ///< For transactions that have a future nonce; we re-insert into current once the sender has a valid TX.
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std::unordered_map<h256, std::function<void(ImportResult)>> m_callbacks; ///< Called once.
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h256Hash m_dropped; ///< Transactions that have previously been dropped.
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Signal m_onReady; ///< Called when a subsequent call to import transactions will return a non-empty container. Be nice and exit fast.
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};
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}
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}
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