moneroexamples
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//
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// Created by mwo on 16/05/17.
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//
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#include "CurrentBlockchainStatus.h"
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namespace xmreg
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{
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using namespace std;
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void
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CurrentBlockchainStatus::set_blockchain_variables(MicroCore* _mcore,
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Blockchain* _core_storage)
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{
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mcore = _mcore;
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core_storage =_core_storage;
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}
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void
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CurrentBlockchainStatus::start_monitor_blockchain_thread()
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{
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total_emission_atomic = Emission {0, 0, 0};
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string emmision_saved_file = get_output_file_path().string();
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// read stored emission data if possible
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if (boost::filesystem::exists(emmision_saved_file))
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{
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if (!load_current_emission_amount())
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{
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cerr << "Emission file cant be read, got corrupted or has incorrect format:\n " << emmision_saved_file
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<< "\nEmission monitoring thread is not started.\nDelete the file and"
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<< " restart the explorer or disable emission monitoring."
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<< endl;
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cerr << "Press ENTER to continue without emission monitoring or Ctr+C to exit" << endl;
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cin.get();
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return;
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}
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}
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if (!is_running)
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{
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m_thread = boost::thread{[]()
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{
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try
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{
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while (true)
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{
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Emission current_emission = total_emission_atomic;
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current_height = core_storage->get_current_blockchain_height();
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// scan 10000 blocks for emissiom or if we are at the top of
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// the blockchain, only few top blocks
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update_current_emission_amount();
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cout << "current emission: " << string(current_emission) << endl;
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save_current_emission_amount();
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if (current_emission.blk_no < current_height - blockchain_chunk_size)
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{
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// while we scan the blockchain from scrach, every 10000
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// blocks take 1 second break
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boost::this_thread::sleep_for(boost::chrono::seconds(1));
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}
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else
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{
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// when we reach top of the blockchain, update
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// the emission amount every minute.
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boost::this_thread::sleep_for(boost::chrono::seconds(60));
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}
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} // while (true)
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}
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catch (boost::thread_interrupted&)
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{
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cout << "Emission monitoring thread interrupted." << endl;
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return;
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}
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}}; // m_thread = boost::thread{[]()
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is_running = true;
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} // if (!is_running)
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}
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void
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CurrentBlockchainStatus::update_current_emission_amount()
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{
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Emission current_emission = total_emission_atomic;
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uint64_t blk_no = current_emission.blk_no;
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uint64_t end_block = blk_no + blockchain_chunk_size;
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uint64_t current_blockchain_height = current_height;
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// blockchain_chunk_gap is used so that we
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// never read and store few top blocks
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// the emission in the top few blocks will be calcalted
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// later
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end_block = end_block > current_blockchain_height
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? current_blockchain_height - blockchain_chunk_gap
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: end_block;
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Emission emission_calculated = calculate_emission_in_blocks(blk_no, end_block);
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current_emission.coinbase += emission_calculated.coinbase;
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current_emission.fee += emission_calculated.fee;
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current_emission.blk_no = emission_calculated.blk_no;
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total_emission_atomic = current_emission;
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}
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CurrentBlockchainStatus::Emission
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CurrentBlockchainStatus::calculate_emission_in_blocks(
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uint64_t start_blk, uint64_t end_blk)
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{
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Emission emission_calculated {0, 0, 0};
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while (start_blk < end_blk)
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{
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block blk;
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mcore->get_block_by_height(start_blk, blk);
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uint64_t coinbase_amount = get_outs_money_amount(blk.miner_tx);
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std::list<transaction> txs;
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std::list<crypto::hash> missed_txs;
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uint64_t tx_fee_amount = 0;
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core_storage->get_transactions(blk.tx_hashes, txs, missed_txs);
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for(const auto& tx: txs)
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{
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tx_fee_amount += get_tx_fee(tx);
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}
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(void) missed_txs;
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emission_calculated.coinbase += coinbase_amount - tx_fee_amount;
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emission_calculated.fee += tx_fee_amount;
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++start_blk;
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}
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emission_calculated.blk_no = start_blk;
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return emission_calculated;
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}
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bool
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CurrentBlockchainStatus::save_current_emission_amount()
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{
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string emmision_saved_file = get_output_file_path().string();
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ofstream out(emmision_saved_file);
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if( !out )
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{
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cerr << "Couldn't open file." << endl;
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return false;
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}
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Emission current_emission = total_emission_atomic;
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out << string(current_emission) << flush;
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return true;
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}
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bool
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CurrentBlockchainStatus::load_current_emission_amount()
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{
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string emmision_saved_file = get_output_file_path().string();
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string last_saved_emmision = xmreg::read(emmision_saved_file);
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if (last_saved_emmision.empty())
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{
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cerr << "Couldn't open file." << endl;
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return false;
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}
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last_saved_emmision.erase(last_saved_emmision.find_last_not_of(" \n\r\t")+1);
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vector<string> strs;
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boost::split(strs, last_saved_emmision, boost::is_any_of(","));
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if (strs.empty())
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{
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cerr << "Problem spliting string values form emission_amount." << endl;
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return false;
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}
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Emission emission_loaded {0, 0, 0};
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uint64_t read_check_sum {0};
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try
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{
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emission_loaded.blk_no = boost::lexical_cast<uint64_t>(strs.at(0));
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emission_loaded.coinbase = boost::lexical_cast<uint64_t>(strs.at(1));
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emission_loaded.fee = boost::lexical_cast<uint64_t>(strs.at(2));
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read_check_sum = boost::lexical_cast<uint64_t>(strs.at(3));
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}
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catch (boost::bad_lexical_cast &e)
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{
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cerr << "Cant parse to number date from string: " << last_saved_emmision << endl;
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return false;
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}
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if (read_check_sum != emission_loaded.checksum())
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{
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cerr << "read_check_sum != check_sum: "
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<< read_check_sum << " != " << emission_loaded.checksum()
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<< endl;
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return false;
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}
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total_emission_atomic = emission_loaded;
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return true;
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}
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bf::path
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CurrentBlockchainStatus::get_output_file_path()
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{
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return blockchain_path / output_file;
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}
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CurrentBlockchainStatus::Emission
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CurrentBlockchainStatus::get_emission()
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{
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// get current emission
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Emission current_emission = total_emission_atomic;
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// this emission will be few blocks behind current blockchain
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// height. By default 3 blocks. So we need to calcualate here
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// the emission from the top missing blocks, to have complete
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// emission data.
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uint64_t current_blockchain_height = current_height;
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uint64_t start_blk = current_emission.blk_no;
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// this should be at current hight or above
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// as we calculate missing blocks only for top blockchain
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// height
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uint64_t end_block = start_blk + blockchain_chunk_gap;
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if (end_block >= current_blockchain_height
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&& start_blk < current_blockchain_height)
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{
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// make sure we are not over the blockchain height
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end_block = end_block > current_blockchain_height
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? current_blockchain_height : end_block;
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// calculated emission for missing blocks
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Emission gap_emission_calculated
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= calculate_emission_in_blocks(start_blk, end_block);
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//cout << "gap_emission_calculated: " << std::string(gap_emission_calculated) << endl;
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current_emission.coinbase += gap_emission_calculated.coinbase;
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current_emission.fee += gap_emission_calculated.fee;
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current_emission.blk_no = gap_emission_calculated.blk_no > 0
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? gap_emission_calculated.blk_no
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: current_emission.blk_no;
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}
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return current_emission;
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}
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bool
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CurrentBlockchainStatus::is_thread_running()
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{
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return is_running;
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}
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bf::path CurrentBlockchainStatus::blockchain_path {"/home/mwo/.bitmonero/lmdb"};
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bool CurrentBlockchainStatus::testnet {false};
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string CurrentBlockchainStatus::output_file {"emission_amount.txt"};
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string CurrentBlockchainStatus::deamon_url {"http:://127.0.0.1:18081"};
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uint64_t CurrentBlockchainStatus::blockchain_chunk_size {10000};
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uint64_t CurrentBlockchainStatus::blockchain_chunk_gap {3};
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atomic<uint64_t> CurrentBlockchainStatus::current_height {0};
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atomic<CurrentBlockchainStatus::Emission> CurrentBlockchainStatus::total_emission_atomic;
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boost::thread CurrentBlockchainStatus::m_thread;
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atomic<bool> CurrentBlockchainStatus::is_running {false};
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Blockchain* CurrentBlockchainStatus::core_storage {nullptr};
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xmreg::MicroCore* CurrentBlockchainStatus::mcore {nullptr};
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}
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@ -0,0 +1,114 @@
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//
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// Created by mwo on 16/05/17.
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//
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#ifndef XMRBLOCKS_CURRENTBLOCKCHAINSTATUS_H
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#define XMRBLOCKS_CURRENTBLOCKCHAINSTATUS_H
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#include "MicroCore.h"
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#include <boost/algorithm/string.hpp>
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#include <iostream>
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#include <memory>
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#include <thread>
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#include <mutex>
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#include <atomic>
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namespace xmreg
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{
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using namespace std;
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namespace bf = boost::filesystem;
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struct CurrentBlockchainStatus
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{
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struct Emission
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{
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uint64_t coinbase;
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uint64_t fee;
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uint64_t blk_no;
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inline uint64_t
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checksum() const
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{
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return coinbase + fee + blk_no;
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}
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operator
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std::string() const
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{
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return to_string(blk_no) + "," + to_string(coinbase)
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+ "," + to_string(fee) + "," + to_string(checksum());
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}
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};
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static bf::path blockchain_path;
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static bool testnet;
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static string output_file;
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static string deamon_url;
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// how many blocks to read before thread goes to sleep
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static uint64_t blockchain_chunk_size;
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// gap from what we store total_emission_atomic and
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// current blockchain height. We dont want to store
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// what is on, e.g., top block, as this can get messy
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// if the block gets orphaned or blockchain reorganization
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// occurs. So the top 3 blocks (default number) will always
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// be calculated in flight and added to what we have so far.
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static uint64_t blockchain_chunk_gap;
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// current blockchain height and
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// hash of top block
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static atomic<uint64_t> current_height;
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static atomic<Emission> total_emission_atomic;
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static boost::thread m_thread;
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static atomic<bool> is_running;
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// make object for accessing the blockchain here
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static MicroCore* mcore;
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static Blockchain* core_storage;
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static void
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start_monitor_blockchain_thread();
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static void
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set_blockchain_variables(MicroCore* _mcore,
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Blockchain* _core_storage);
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static void
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update_current_emission_amount();
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static Emission
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calculate_emission_in_blocks(uint64_t start_blk, uint64_t end_blk);
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static bool
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save_current_emission_amount();
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static bool
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load_current_emission_amount();
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static Emission
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get_emission();
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static bf::path
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get_output_file_path();
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static bool
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is_thread_running();
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};
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}
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#endif //XMRBLOCKS_CURRENTBLOCKCHAINSTATUS_H
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