Emission atomic structure added

CMakeLists.txt

@@ -113,6 +113,7 @@ set(LIBRARIES
         unbound
         curl
         crypto
+        atomic
         ssl)
 
 if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT WIN32)

main.cpp

@@ -26,7 +26,18 @@ struct jsonresponse: crow::response
 };
 }
 
+class ExitHandler
+{
+public:
+    void exit() { exitHandler(0); }
+    static void exitHandler(int) { s_shouldExit = true; }
+    bool shouldExit() const { return s_shouldExit; }
+
+private:
+    static bool s_shouldExit;
+};
 
+bool ExitHandler::s_shouldExit = false;
 
 int main(int ac, const char* av[]) {
 
@@ -60,6 +71,8 @@ int main(int ac, const char* av[]) {
     auto enable_tx_cache_opt           = opts.get_option<bool>("enable-tx-cache");
     auto enable_block_cache_opt        = opts.get_option<bool>("enable-block-cache");
     auto show_cache_times_opt          = opts.get_option<bool>("show-cache-times");
+    auto enable_emission_monitor_opt   = opts.get_option<bool>("enable-emission-monitor");
+
 
     bool testnet                      {*testnet_opt};
     bool enable_pusher                {*enable_pusher_opt};
@@ -71,6 +84,7 @@ int main(int ac, const char* av[]) {
     bool enable_json_api              {*enable_json_api_opt};
     bool enable_tx_cache              {*enable_tx_cache_opt};
     bool enable_block_cache           {*enable_block_cache_opt};
+    bool enable_emission_monitor      {*enable_emission_monitor_opt};
     bool show_cache_times             {*show_cache_times_opt};
 
 
@@ -149,24 +163,41 @@ int main(int ac, const char* av[]) {
         deamon_url = "http:://127.0.0.1:28081";
     }
 
-    xmreg::CurrentBlockchainStatus::blockchain_path
-            =  blockchain_path.string();
-    xmreg::CurrentBlockchainStatus::testnet
-            = testnet;
-    xmreg::CurrentBlockchainStatus::deamon_url
-            = deamon_url;
 
-    if (!xmreg::CurrentBlockchainStatus::init_monero_blockchain())
+    if (enable_emission_monitor == true)
     {
-        cerr << "Error accessing blockchain from CurrentBlockchainStatus." << endl;
-        return EXIT_FAILURE;
-    }
+        // This starts new thread, which aim is
+        // to calculate, store and monitor
+        // current total Monero emission amount.
+
+        // This thread stores the current emission
+        // which it has caluclated in
+        // <blockchain_path>/emission_amount.txt file,
+        // e.g., ~/.bitmonero/lmdb/emission_amount.txt.
+        // So instead of calcualting the emission
+        // from scrach whenever the explorer is started,
+        // the thread is initalized with the values
+        // found in emission_amount.txt file.
+
+        xmreg::CurrentBlockchainStatus::blockchain_path
+                = blockchain_path.string();
+        xmreg::CurrentBlockchainStatus::testnet
+                = testnet;
+        xmreg::CurrentBlockchainStatus::deamon_url
+                = deamon_url;
+
+        if (!xmreg::CurrentBlockchainStatus::init_monero_blockchain())
+        {
+            cerr << "Error accessing blockchain from CurrentBlockchainStatus." << endl;
+            return EXIT_FAILURE;
+        }
 
-    // launch the status monitoring thread so that it keeps track of blockchain
-    // info, e.g., current height. Information from this thread is used
-    // by tx searching threads that are launched for each user independently,
-    // when they log back or create new account.
-    xmreg::CurrentBlockchainStatus::start_monitor_blockchain_thread();
+        // launch the status monitoring thread so that it keeps track of blockchain
+        // info, e.g., current height. Information from this thread is used
+        // by tx searching threads that are launched for each user independently,
+        // when they log back or create new account.
+        xmreg::CurrentBlockchainStatus::start_monitor_blockchain_thread();
+    }
 
     // create instance of page class which
     // contains logic for the website

src/CmdLineOptions.cpp

@@ -45,6 +45,8 @@ namespace xmreg
                  "enable caching of block details")
                 ("enable-autorefresh-option", value<bool>()->default_value(false)->implicit_value(true),
                  "enable users to have the index page on autorefresh")
+                ("enable-emission-monitor", value<bool>()->default_value(false)->implicit_value(true),
+                 "enable Monero total emission monitoring thread")
                 ("port,p", value<string>()->default_value("8081"),
                  "default port")
                 ("testnet-url", value<string>()->default_value(""),

src/CurrentBlockchainStatus.cpp

@@ -38,6 +38,7 @@ CurrentBlockchainStatus::init_monero_blockchain()
 void
 CurrentBlockchainStatus::start_monitor_blockchain_thread()
 {
+    total_emission_atomic = Emission {0, 0, 0};
 
     string emmision_saved_file = get_output_file_path();
 
@@ -64,13 +65,15 @@ CurrentBlockchainStatus::start_monitor_blockchain_thread()
            {
                while (true)
                {
+                   Emission current_emission = total_emission_atomic;
+
                    current_height = core_storage->get_current_blockchain_height();
 
                    update_current_emission_amount();
 
                    save_current_emission_amount();
 
-                   if (searched_blk_no < current_height - blockchain_chunk_size)
+                   if (current_emission.blk_no < current_height - blockchain_chunk_size)
                    {
                        std::this_thread::sleep_for(std::chrono::seconds(1));
                    }
@@ -90,9 +93,9 @@ void
 CurrentBlockchainStatus::update_current_emission_amount()
 {
 
-    cout << "updating emission rate: " << current_height << endl;
+    Emission current_emission = total_emission_atomic;
 
-    uint64_t blk_no = searched_blk_no;
+    uint64_t blk_no = current_emission.blk_no;
 
     uint64_t end_block = blk_no + blockchain_chunk_size;
 
@@ -100,8 +103,8 @@ CurrentBlockchainStatus::update_current_emission_amount()
 
     end_block = end_block > current_blockchain_height ? current_blockchain_height : end_block;
 
-    uint64_t current_emission_amount {0};
-    uint64_t current_fee_amount {0};
+    uint64_t temp_emission_amount {0};
+    uint64_t temp_fee_amount {0};
 
     while (blk_no < end_block)
     {
@@ -124,20 +127,19 @@ CurrentBlockchainStatus::update_current_emission_amount()
             tx_fee_amount += get_tx_fee(tx);
         }
 
-        current_emission_amount += coinbase_amount - tx_fee_amount;
-        current_fee_amount += tx_fee_amount;
+        temp_emission_amount += coinbase_amount - tx_fee_amount;
+        temp_fee_amount      += tx_fee_amount;
 
         ++blk_no;
     }
 
-    searched_blk_no = blk_no;
-    total_emission_amount += current_emission_amount;
-    total_fee_amount += current_fee_amount;
+    current_emission.coinbase += temp_emission_amount;
+    current_emission.fee      += temp_fee_amount;
+    current_emission.blk_no    = blk_no;
+
+    total_emission_atomic = current_emission;
 
-    cout << "blk: " << blk_no
-         << " total_emission_amount: " << xmr_amount_to_str(uint64_t(total_emission_amount))
-         << " total_fee_amount: " << xmr_amount_to_str(uint64_t(total_fee_amount))
-         << endl;
+    cout << "total emission: " << string(current_emission) << endl;
 }
 
 
@@ -156,16 +158,9 @@ CurrentBlockchainStatus::save_current_emission_amount()
         return false;
     }
 
-    uint64_t check_sum = uint64_t(searched_blk_no)
-                         + uint64_t(total_emission_amount)
-                         + uint64_t(total_fee_amount);
-
-    string out_line = to_string(searched_blk_no)
-                      + "," + to_string(total_emission_amount)
-                      + "," + to_string(total_fee_amount)
-                      + "," + to_string(check_sum);
+    Emission current_emission = total_emission_atomic;
 
-    out << out_line << flush;
+    out << string(current_emission) << flush;
 
     return true;
 }
@@ -195,14 +190,16 @@ CurrentBlockchainStatus::load_current_emission_amount()
         return false;
     }
 
-    uint64_t read_check_sum{0};
+    Emission emission_loaded {0, 0, 0};
+
+    uint64_t read_check_sum {0};
 
     try
     {
-        searched_blk_no       = boost::lexical_cast<uint64_t>(strs.at(0));
-        total_emission_amount = boost::lexical_cast<uint64_t>(strs.at(1));
-        total_fee_amount      = boost::lexical_cast<uint64_t>(strs.at(2));
-        read_check_sum        = boost::lexical_cast<uint64_t>(strs.at(3));
+        emission_loaded.blk_no   = boost::lexical_cast<uint64_t>(strs.at(0));
+        emission_loaded.coinbase = boost::lexical_cast<uint64_t>(strs.at(1));
+        emission_loaded.fee      = boost::lexical_cast<uint64_t>(strs.at(2));
+        read_check_sum           = boost::lexical_cast<uint64_t>(strs.at(3));
     }
     catch (boost::bad_lexical_cast &e)
     {
@@ -210,19 +207,17 @@ CurrentBlockchainStatus::load_current_emission_amount()
         return false;
     }
 
-    uint64_t check_sum = uint64_t(searched_blk_no)
-                         + uint64_t(total_emission_amount)
-                         + uint64_t(total_fee_amount);
-
-    if (read_check_sum != check_sum)
+    if (read_check_sum != emission_loaded.checksum())
     {
         cerr << "read_check_sum != check_sum: "
-             << read_check_sum << " != " << check_sum
+             << read_check_sum << " != " << emission_loaded.checksum()
              << endl;
 
         return false;
     }
 
+    total_emission_atomic = emission_loaded;
+
     return true;
 
 }
@@ -236,16 +231,10 @@ CurrentBlockchainStatus::get_output_file_path()
 }
 
 
-vector<uint64_t>
-CurrentBlockchainStatus::get_emission_amount()
+CurrentBlockchainStatus::Emission
+CurrentBlockchainStatus::get_emission()
 {
-
-    uint64_t searched_block  = searched_blk_no;
-    uint64_t emission_amount = total_emission_amount;
-    uint64_t fee_amount      = total_fee_amount;
-
-    return {searched_block, emission_amount, fee_amount};
-
+    return total_emission_atomic.load();
 }
 
 bool
@@ -266,11 +255,7 @@ uint64_t  CurrentBlockchainStatus::blockchain_chunk_size {10000};
 
 atomic<uint64_t> CurrentBlockchainStatus::current_height {0};
 
-atomic<uint64_t> CurrentBlockchainStatus::total_emission_amount {0} ;
-
-atomic<uint64_t> CurrentBlockchainStatus::total_fee_amount {0} ;
-
-atomic<uint64_t> CurrentBlockchainStatus::searched_blk_no {0};
+atomic<CurrentBlockchainStatus::Emission> CurrentBlockchainStatus::total_emission_atomic;
 
 std::thread      CurrentBlockchainStatus::m_thread;
 

src/CurrentBlockchainStatus.h

@@ -23,6 +23,26 @@ using namespace std;
 struct CurrentBlockchainStatus
 {
 
+    struct Emission
+    {
+        uint64_t coinbase;
+        uint64_t fee;
+        uint64_t blk_no;
+
+        inline uint64_t
+        checksum() const
+        {
+            return coinbase + fee + blk_no;
+        }
+
+        operator
+        std::string() const
+        {
+            return to_string(blk_no) + "," + to_string(coinbase)
+                   + "," + to_string(fee) + "," + to_string(checksum());
+        }
+    };
+
     static string blockchain_path;
 
     static bool testnet;
@@ -35,11 +55,7 @@ struct CurrentBlockchainStatus
 
     static atomic<uint64_t> current_height;
 
-    static atomic<uint64_t> total_emission_amount;
-
-    static atomic<uint64_t> total_fee_amount;
-
-    static atomic<uint64_t> searched_blk_no;
+    static atomic<Emission> total_emission_atomic;
 
     static std::thread m_thread;
 
@@ -65,8 +81,8 @@ struct CurrentBlockchainStatus
     static bool
     load_current_emission_amount();
 
-    static vector<uint64_t>
-    get_emission_amount();
+    static Emission
+    get_emission();
 
     static string
     get_output_file_path();

src/page.h

@@ -761,17 +761,17 @@ namespace xmreg
 
             if (CurrentBlockchainStatus::is_thread_running())
             {
-                vector<uint64_t> emission_values
-                        = CurrentBlockchainStatus::get_emission_amount();
+                CurrentBlockchainStatus::Emission current_values
+                        = CurrentBlockchainStatus::get_emission();
 
-                string emission_blk_no     = std::to_string(emission_values.at(0) - 1);
-                string emission_amount     = xmr_amount_to_str(emission_values.at(1), "{:0.3f}");
-                string emission_fee_amount = xmr_amount_to_str(emission_values.at(2), "{:0.3f}");
+                string emission_blk_no  = std::to_string(current_values.blk_no);
+                string emission_coinbase = xmr_amount_to_str(current_values.coinbase, "{:0.3f}");
+                string emission_fee      = xmr_amount_to_str(current_values.fee, "{:0.3f}");
 
                 context["emission"] = mstch::map {
                         {"blk_no"    , emission_blk_no},
-                        {"amount"    , emission_amount},
-                        {"fee_amount", emission_fee_amount}
+                        {"amount"    , emission_coinbase},
+                        {"fee_amount", emission_fee}
                 };
             }
             else