LogFilter.h

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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/>.
*/
#pragma once
 
#include <libdevcore/Common.h>
#include <libdevcore/RLP.h>
#include <libethcore/Common.h>
#include "TransactionReceipt.h"
 
#ifdef __INTEL_COMPILER
#pragma warning(disable:1098) //the qualifier on this friend declaration is ignored
#endif
 
namespace dev
{
 
namespace eth
{
class LogFilter;
}
 
namespace eth
{
 
std::ostream& operator<<(std::ostream& _out, dev::eth::LogFilter const& _s);
 
class State;
class Block;
 
class LogFilter
{
public:
    LogFilter(h256 _earliest = EarliestBlockHash, h256 _latest = PendingBlockHash): m_earliest(_earliest), m_latest(_latest) {}
 
    void streamRLP(RLPStream& _s) const;
    h256 sha3() const;
 
    h256 earliest() const { return m_earliest; }
 
    h256 latest() const { return m_latest; }
 
    bool isRangeFilter() const;
 
    std::vector<LogBloom> bloomPossibilities() const;
 
    bool matches(LogBloom _bloom) const;
    bool matches(Block const& _b, unsigned _i) const;
    LogEntries matches(TransactionReceipt const& _r) const;
 
    LogFilter address(Address _a) { m_addresses.insert(_a); return *this; }
    LogFilter topic(unsigned _index, h256 const& _t) { if (_index < 4) m_topics[_index].insert(_t); return *this; }
    LogFilter withEarliest(h256 _e) { m_earliest = _e; return *this; }
    LogFilter withLatest(h256 _e) { m_latest = _e; return *this; }
 
    friend std::ostream& dev::eth::operator<<(std::ostream& _out, dev::eth::LogFilter const& _s);
 
private:
    AddressHash m_addresses;
    std::array<h256Hash, 4> m_topics;
    h256 m_earliest = EarliestBlockHash;
    h256 m_latest = PendingBlockHash;
};
 
}
 
}