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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 WhisperHost.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#pragma once
#include <mutex>
#include <array>
#include <set>
#include <memory>
#include <utility>
#include <libdevcore/RLP.h>
#include <libdevcore/Guards.h>
#include <libdevcrypto/SHA3.h>
#include "Common.h"
#include "Message.h"
namespace dev
{
namespace shh
{
/*struct TopicMask
{
Topic data;
Topic mask;
};*/
class Watch;
struct InstalledFilter
{
InstalledFilter(TopicFilter const& _f): filter(_f) {}
TopicFilter filter;
unsigned refCount = 1;
};
struct ClientWatch
{
ClientWatch() {}
explicit ClientWatch(h256 _id): id(_id) {}
h256 id;
h256s changes;
};
class Interface
{
public:
virtual ~Interface() {}
virtual void inject(Envelope const& _m, WhisperPeer* _from = nullptr) = 0;
unsigned installWatch(TopicMask const& _mask);
virtual unsigned installWatch(TopicFilter const& _filter) = 0;
virtual unsigned installWatchOnId(h256 _filterId) = 0;
virtual void uninstallWatch(unsigned _watchId) = 0;
virtual h256s peekWatch(unsigned _watchId) const = 0;
virtual h256s checkWatch(unsigned _watchId) = 0;
virtual h256s watchMessages(unsigned _watchId) = 0;
virtual Envelope envelope(h256 _m) const = 0;
void post(bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).seal(_topic, _ttl, _workToProve)); }
void post(Public _to, bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).sealTo(_to, _topic, _ttl, _workToProve)); }
void post(Secret _from, bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).seal(_from, _topic, _ttl, _workToProve)); }
void post(Secret _from, Public _to, bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).sealTo(_from, _to, _topic, _ttl, _workToProve)); }
};
struct WatshhChannel: public dev::LogChannel { static const char* name() { return "shh"; } static const int verbosity = 1; };
#define cwatshh dev::LogOutputStream<shh::WatshhChannel, true>()
}
}
namespace std { void swap(dev::shh::Watch& _a, dev::shh::Watch& _b); }
namespace dev
{
namespace shh
{
class Watch: public boost::noncopyable
{
friend void std::swap(Watch& _a, Watch& _b);
public:
Watch() {}
Watch(Interface& _c, TopicMask const& _f): m_c(&_c), m_id(_c.installWatch(_f)) {}
Watch(Interface& _c, TopicFilter const& _tf): m_c(&_c), m_id(_c.installWatch(_tf)) {}
~Watch() { if (m_c) m_c->uninstallWatch(m_id); }
h256s check() { return m_c ? m_c->checkWatch(m_id) : h256s(); }
h256s peek() { return m_c ? m_c->peekWatch(m_id) : h256s(); }
private:
Interface* m_c;
unsigned m_id;
};
}
}
namespace std
{
inline void swap(dev::shh::Watch& _a, dev::shh::Watch& _b)
{
swap(_a.m_c, _b.m_c);
swap(_a.m_id, _b.m_id);
}
}