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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file TransactionQueue.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#pragma once
#include <boost/thread.hpp>
#include <libdevcore/Common.h>
#include "libethcore/Common.h"
#include <libdevcore/Guards.h>
namespace dev
{
namespace eth
{
class BlockChain;
/**
* @brief A queue of Transactions, each stored as RLP.
* @threadsafe
*/
class TransactionQueue
{
public:
bool attemptImport(bytesConstRef _tx) { try { import(_tx); return true; } catch (...) { return false; } }
bool attemptImport(bytes const& _tx) { return attemptImport(&_tx); }
bool import(bytesConstRef _tx);
void drop(h256 _txHash);
std::map<h256, bytes> transactions() const { ReadGuard l(m_lock); return m_current; }
std::pair<unsigned, unsigned> items() const { ReadGuard l(m_lock); return std::make_pair(m_current.size(), m_unknown.size()); }
void setFuture(std::pair<h256, bytes> const& _t);
void noteGood(std::pair<h256, bytes> const& _t);
void clear() { WriteGuard l(m_lock); m_known.clear(); m_current.clear(); m_unknown.clear(); }
private:
mutable boost::shared_mutex m_lock; ///< General lock.
std::set<h256> m_known; ///< Hashes of transactions in both sets.
std::map<h256, bytes> m_current; ///< Map of SHA3(tx) to tx.
std::multimap<Address, std::pair<h256, bytes>> m_unknown; ///< For transactions that have a future nonce; we map their sender address to the tx stuff, and insert once the sender has a valid TX.
};
}
}