read_mempool added to MempoolStatus thread

src/MempoolStatus.cpp

@@ -4,6 +4,8 @@
 
 #include "MempoolStatus.h"
 
+#include "rpccalls.h"
+
 namespace xmreg
 {
 
@@ -12,17 +14,15 @@ using namespace std;
 
 void
 MempoolStatus::set_blockchain_variables(MicroCore *_mcore,
-                                        Blockchain *_core_storage) {
+                                        Blockchain *_core_storage)
+{
     mcore = _mcore;
     core_storage = _core_storage;
 }
 
-
-
 void
 MempoolStatus::start_mempool_status_thread()
 {
-
     if (!is_running)
     {
         m_thread = boost::thread{[]()
@@ -31,15 +31,20 @@ MempoolStatus::start_mempool_status_thread()
          {
              while (true)
              {
-
-                 cout << "mempool status: " << endl;
-
+                 if (MempoolStatus::read_mempool())
+                 {
+                     vector<mempool_tx> current_mempool_txs = get_mempool_txs();
+                     cout << "mempool status: " << current_mempool_txs.size() << endl;
+                 }
+                 else
+                 {
+                     cerr << "Cant read_mempool()" << endl;
+                 }
 
                  // when we reach top of the blockchain, update
                  // the emission amount every minute.
                  boost::this_thread::sleep_for(boost::chrono::seconds(10));
 
-
              } // while (true)
          }
          catch (boost::thread_interrupted&)
@@ -55,6 +60,82 @@ MempoolStatus::start_mempool_status_thread()
     } //  if (!is_running)
 }
 
+
+bool
+MempoolStatus::read_mempool()
+{
+    rpccalls rpc {deamon_url};
+
+    string error_msg;
+
+    // we populate this variable instead of global mempool_txs
+    // mempool_txs will be changed only when this function completes.
+    // this ensures that we don't sent out partial mempool txs to
+    // other places.
+    vector<mempool_tx> local_copy_of_mempool_txs;
+
+    // get txs in the mempool
+    std::vector<tx_info> mempool_tx_info;
+
+    if (!rpc.get_mempool(mempool_tx_info))
+    {
+        cerr << "Getting mempool failed " << endl;
+        return false;
+    }
+
+    // if dont have tx_blob member, construct tx
+    // from json obtained from the rpc call
+
+    for (size_t i = 0; i < mempool_tx_info.size(); ++i)
+    {
+        // get transaction info of the tx in the mempool
+        const tx_info& _tx_info = mempool_tx_info.at(i);
+
+        crypto::hash mem_tx_hash = null_hash;
+
+        if (epee::string_tools::hex_to_pod(_tx_info.id_hash, mem_tx_hash))
+        {
+            transaction tx;
+
+            if (!xmreg::make_tx_from_json(_tx_info.tx_json, tx))
+            {
+                cerr << "Cant make tx from _tx_info.tx_json" << endl;
+                return false;
+            }
+
+            if (_tx_info.id_hash != epee::string_tools::pod_to_hex(get_transaction_hash(tx)))
+            {
+                cerr << "Hash of reconstructed tx from json does not match "
+                        "what we should get!"
+                     << endl;
+
+                return false;
+            }
+
+            local_copy_of_mempool_txs.emplace_back(_tx_info.receive_time, tx);
+
+        } // if (hex_to_pod(_tx_info.id_hash, mem_tx_hash))
+
+    } // for (size_t i = 0; i < mempool_tx_info.size(); ++i)
+
+    std::lock_guard<std::mutex> lck (mempool_mutx);
+
+    // clear current mempool txs vector
+    // repopulate it with each execution of read_mempool()
+    // not very efficient but good enough for now.
+    mempool_txs = std::move(local_copy_of_mempool_txs);
+
+    return true;
+}
+
+vector<MempoolStatus::mempool_tx>
+MempoolStatus::get_mempool_txs()
+{
+    std::lock_guard<std::mutex> lck (mempool_mutx);
+    return mempool_txs;
+}
+
+
 bool
 MempoolStatus::is_thread_running()
 {
@@ -64,9 +145,10 @@ MempoolStatus::is_thread_running()
 bf::path MempoolStatus::blockchain_path {"/home/mwo/.bitmonero/lmdb"};
 string MempoolStatus::deamon_url {"http:://127.0.0.1:18081"};
 bool   MempoolStatus::testnet {false};
-atomic<bool>     MempoolStatus::is_running {false};
+atomic<bool>       MempoolStatus::is_running {false};
 boost::thread      MempoolStatus::m_thread;
 Blockchain*        MempoolStatus::core_storage {nullptr};
 xmreg::MicroCore*  MempoolStatus::mcore {nullptr};
-
+vector<MempoolStatus::mempool_tx> MempoolStatus::mempool_txs;
+mutex MempoolStatus::mempool_mutx;
 }

src/MempoolStatus.h

@@ -22,8 +22,12 @@ namespace xmreg
 struct MempoolStatus
 {
 
+    using mempool_tx = pair<uint64_t, transaction>;
+
     static boost::thread m_thread;
 
+    static mutex mempool_mutx;
+
     static atomic<bool> is_running;
 
     static bf::path blockchain_path;
@@ -34,6 +38,11 @@ struct MempoolStatus
     static MicroCore* mcore;
     static Blockchain* core_storage;
 
+    // vector of mempool transactions that all threads
+    // can refer to
+    //           <recieved_time, transaction>
+    static vector<mempool_tx> mempool_txs;
+
     static void
     set_blockchain_variables(MicroCore* _mcore,
                              Blockchain* _core_storage);
@@ -41,6 +50,12 @@ struct MempoolStatus
     static void
     start_mempool_status_thread();
 
+    static bool
+    read_mempool();
+
+    static vector<mempool_tx>
+    get_mempool_txs();
+
     static bool
     is_thread_running();
 };