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// Copyright (c) 2019, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#pragma once
#include <boost/asio/io_service.hpp>
#include <boost/uuid/uuid.hpp>
#include <memory>
#include <vector>
#include "byte_slice.h"
#include "cryptonote_basic/blobdatatype.h"
#include "net/enums.h"
#include "span.h"
namespace epee
{
namespace levin
{
template<typename> class async_protocol_handler_config;
}
}
namespace nodetool
{
template<typename> struct p2p_connection_context_t;
}
namespace cryptonote
{
struct cryptonote_connection_context;
}
namespace cryptonote
{
namespace levin
{
namespace detail
{
using p2p_context = nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context>;
struct zone; //!< Internal data needed for zone notifications
} // detail
using connections = epee::levin::async_protocol_handler_config<detail::p2p_context>;
//! Provides tx notification privacy
class notify
{
std::shared_ptr<detail::zone> zone_;
public:
struct status
{
bool has_noise;
bool connections_filled;
};
//! Construct an instance that cannot notify.
notify() noexcept
: zone_(nullptr)
{}
//! Construct an instance with available notification `zones`.
explicit notify(boost::asio::io_service& service, std::shared_ptr<connections> p2p, epee::byte_slice noise);
notify(const notify&) = delete;
notify(notify&&) = default;
~notify() noexcept;
notify& operator=(const notify&) = delete;
notify& operator=(notify&&) = default;
//! \return Status information for zone selection.
status get_status() const noexcept;
//! Probe for new outbound connection - skips if not needed.
void new_out_connection();
//! Run the logic for the next epoch immediately. Only use in testing.
void run_epoch();
//! Run the logic for the next stem timeout imemdiately. Only use in testing.
void run_stems();
/*! Send txs using `cryptonote_protocol_defs.h` payload format wrapped in a
levin header. The message will be sent in a "discreet" manner if
enabled - if `!noise.empty()` then the `command`/`payload` will be
queued to send at the next available noise interval. Otherwise, a
standard Monero flood notification will be used.
\note Eventually Dandelion++ stem sending will be used here when
enabled.
\param txs The transactions that need to be serialized and relayed.
\param source The source of the notification. `is_nil()` indicates this
node is the source. Dandelion++ will use this to map a source to a
particular stem.
\param pad_txs A request to pad txs to help conceal origin via
statistical analysis. Ignored if noise was enabled during
construction.
\return True iff the notification is queued for sending. */
bool send_txs(std::vector<blobdata> txs, const boost::uuids::uuid& source, bool pad_txs);
};
} // levin
} // net
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