106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
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// Copyright (c) 2012-2015, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// Bytecoin 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#include "BlockchainMonitor.h"
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#include "Common/StringTools.h"
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#include <System/EventLock.h>
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#include <System/Timer.h>
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#include <System/InterruptedException.h>
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#include "Rpc/CoreRpcServerCommandsDefinitions.h"
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#include "Rpc/JsonRpc.h"
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#include "Rpc/HttpClient.h"
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BlockchainMonitor::BlockchainMonitor(System::Dispatcher& dispatcher, const std::string& daemonHost, uint16_t daemonPort, size_t pollingInterval, Logging::ILogger& logger):
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m_dispatcher(dispatcher),
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m_daemonHost(daemonHost),
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m_daemonPort(daemonPort),
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m_pollingInterval(pollingInterval),
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m_stopped(false),
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m_httpEvent(dispatcher),
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m_sleepingContext(dispatcher),
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m_logger(logger, "BlockchainMonitor") {
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m_httpEvent.set();
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}
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void BlockchainMonitor::waitBlockchainUpdate() {
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m_logger(Logging::DEBUGGING) << "Waiting for blockchain updates";
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m_stopped = false;
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Crypto::Hash lastBlockHash = requestLastBlockHash();
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while(!m_stopped) {
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m_sleepingContext.spawn([this] () {
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System::Timer timer(m_dispatcher);
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timer.sleep(std::chrono::seconds(m_pollingInterval));
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});
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m_sleepingContext.wait();
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if (lastBlockHash != requestLastBlockHash()) {
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m_logger(Logging::DEBUGGING) << "Blockchain has been updated";
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break;
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}
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}
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if (m_stopped) {
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m_logger(Logging::DEBUGGING) << "Blockchain monitor has been stopped";
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throw System::InterruptedException();
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}
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}
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void BlockchainMonitor::stop() {
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m_logger(Logging::DEBUGGING) << "Sending stop signal to blockchain monitor";
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m_stopped = true;
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m_sleepingContext.interrupt();
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m_sleepingContext.wait();
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}
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Crypto::Hash BlockchainMonitor::requestLastBlockHash() {
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m_logger(Logging::DEBUGGING) << "Requesting last block hash";
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try {
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CryptoNote::HttpClient client(m_dispatcher, m_daemonHost, m_daemonPort);
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CryptoNote::COMMAND_RPC_GET_LAST_BLOCK_HEADER::request request;
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CryptoNote::COMMAND_RPC_GET_LAST_BLOCK_HEADER::response response;
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System::EventLock lk(m_httpEvent);
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CryptoNote::JsonRpc::invokeJsonRpcCommand(client, "getlastblockheader", request, response);
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if (response.status != CORE_RPC_STATUS_OK) {
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throw std::runtime_error("Core responded with wrong status: " + response.status);
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}
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Crypto::Hash blockHash;
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if (!Common::podFromHex(response.block_header.hash, blockHash)) {
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throw std::runtime_error("Couldn't parse block hash: " + response.block_header.hash);
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}
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m_logger(Logging::DEBUGGING) << "Last block hash: " << Common::podToHex(blockHash);
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return blockHash;
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} catch (std::exception& e) {
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m_logger(Logging::ERROR) << "Failed to request last block hash: " << e.what();
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throw;
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}
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}
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