diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b095f54..86edd95c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,7 +168,7 @@ else()
     endif()
 endif()
 
-add_definitions(-DXMRIG_MINER_PROJECT)
+add_definitions(-DXMRIG_MINER_PROJECT -DXMRIG_JSON_SINGLE_LINE_ARRAY)
 add_definitions(-D__STDC_FORMAT_MACROS -DUNICODE)
 
 find_package(UV REQUIRED)
diff --git a/cmake/randomx.cmake b/cmake/randomx.cmake
index 99de2632..9b6f76bc 100644
--- a/cmake/randomx.cmake
+++ b/cmake/randomx.cmake
@@ -108,6 +108,13 @@ if (WITH_RANDOMX)
         remove_definitions(/DXMRIG_FIX_RYZEN)
         message("-- WITH_MSR=OFF")
     endif()
+
+    if (WITH_PROFILING)
+        add_definitions(/DXMRIG_FEATURE_PROFILING)
+
+        list(APPEND HEADERS_CRYPTO src/crypto/rx/Profiler.h)
+        list(APPEND SOURCES_CRYPTO src/crypto/rx/Profiler.cpp)
+    endif()
 else()
     remove_definitions(/DXMRIG_ALGO_RANDOMX)
 endif()
diff --git a/src/App.cpp b/src/App.cpp
index 1d1ec3e9..39ec0d62 100644
--- a/src/App.cpp
+++ b/src/App.cpp
@@ -43,17 +43,13 @@
 
 xmrig::App::App(Process *process)
 {
-    m_controller = new Controller(process);
+    m_controller = std::make_shared<Controller>(process);
 }
 
 
 xmrig::App::~App()
 {
     Cpu::release();
-
-    delete m_signals;
-    delete m_console;
-    delete m_controller;
 }
 
 
@@ -65,7 +61,7 @@ int xmrig::App::exec()
         return 2;
     }
 
-    m_signals = new Signals(this);
+    m_signals = std::make_shared<Signals>(this);
 
     int rc = 0;
     if (background(rc)) {
@@ -78,10 +74,10 @@ int xmrig::App::exec()
     }
 
     if (!m_controller->isBackground()) {
-        m_console = new Console(this);
+        m_console = std::make_shared<Console>(this);
     }
 
-    Summary::print(m_controller);
+    Summary::print(m_controller.get());
 
     if (m_controller->config()->isDryRun()) {
         LOG_NOTICE("%s " WHITE_BOLD("OK"), Tags::config());
@@ -115,32 +111,20 @@ void xmrig::App::onSignal(int signum)
     switch (signum)
     {
     case SIGHUP:
-        LOG_WARN("%s " YELLOW("SIGHUP received, exiting"), Tags::signal());
-        break;
-
     case SIGTERM:
-        LOG_WARN("%s " YELLOW("SIGTERM received, exiting"), Tags::signal());
-        break;
-
     case SIGINT:
-        LOG_WARN("%s " YELLOW("SIGINT received, exiting"), Tags::signal());
-        break;
+        return close();
 
     default:
-        return;
+        break;
     }
-
-    close();
 }
 
 
 void xmrig::App::close()
 {
-    m_signals->stop();
-
-    if (m_console) {
-        m_console->stop();
-    }
+    m_signals.reset();
+    m_console.reset();
 
     m_controller->stop();
 
diff --git a/src/App.h b/src/App.h
index 122e8fb6..962baead 100644
--- a/src/App.h
+++ b/src/App.h
@@ -32,6 +32,9 @@
 #include "base/tools/Object.h"
 
 
+#include <memory>
+
+
 namespace xmrig {
 
 
@@ -60,9 +63,9 @@ private:
     bool background(int &rc);
     void close();
 
-    Console *m_console          = nullptr;
-    Controller *m_controller    = nullptr;
-    Signals *m_signals          = nullptr;
+    std::shared_ptr<Console> m_console;
+    std::shared_ptr<Controller> m_controller;
+    std::shared_ptr<Signals> m_signals;
 };
 
 
diff --git a/src/App_unix.cpp b/src/App_unix.cpp
index ae2905db..b0b80079 100644
--- a/src/App_unix.cpp
+++ b/src/App_unix.cpp
@@ -5,8 +5,8 @@
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
  * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -36,8 +36,6 @@
 
 bool xmrig::App::background(int &rc)
 {
-    signal(SIGPIPE, SIG_IGN);
-
     if (!m_controller->isBackground()) {
         return false;
     }
diff --git a/src/Summary.cpp b/src/Summary.cpp
index a026c938..e96a222d 100644
--- a/src/Summary.cpp
+++ b/src/Summary.cpp
@@ -160,11 +160,11 @@ static void print_threads(Config *config)
 static void print_commands(Config *)
 {
     if (Log::isColors()) {
-        Log::print(GREEN_BOLD(" * ") WHITE_BOLD("COMMANDS     ") MAGENTA_BG(WHITE_BOLD_S "h") WHITE_BOLD("ashrate, ")
-                                                                 MAGENTA_BG(WHITE_BOLD_S "p") WHITE_BOLD("ause, ")
-                                                                 MAGENTA_BG(WHITE_BOLD_S "r") WHITE_BOLD("esume, ")
+        Log::print(GREEN_BOLD(" * ") WHITE_BOLD("COMMANDS     ") MAGENTA_BG_BOLD("h") WHITE_BOLD("ashrate, ")
+                                                                 MAGENTA_BG_BOLD("p") WHITE_BOLD("ause, ")
+                                                                 MAGENTA_BG_BOLD("r") WHITE_BOLD("esume, ")
                                                                  WHITE_BOLD("re") MAGENTA_BG(WHITE_BOLD_S "s") WHITE_BOLD("ults, ")
-                                                                 MAGENTA_BG(WHITE_BOLD_S "c") WHITE_BOLD("onnection")
+                                                                 MAGENTA_BG_BOLD("c") WHITE_BOLD("onnection")
                    );
     }
     else {
diff --git a/src/backend/common/GpuWorker.cpp b/src/backend/common/GpuWorker.cpp
new file mode 100644
index 00000000..5a9c3d13
--- /dev/null
+++ b/src/backend/common/GpuWorker.cpp
@@ -0,0 +1,52 @@
+/* XMRig
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "backend/common/GpuWorker.h"
+#include "base/tools/Chrono.h"
+
+
+xmrig::GpuWorker::GpuWorker(size_t id, int64_t affinity, int priority, uint32_t deviceIndex) : Worker(id, affinity, priority),
+    m_deviceIndex(deviceIndex)
+{
+}
+
+
+void xmrig::GpuWorker::storeStats()
+{
+    // Get index which is unused now
+    const uint32_t index = m_index.load(std::memory_order_relaxed) ^ 1;
+
+    // Fill in the data for that index
+    m_hashCount[index] = m_count;
+    m_timestamp[index] = Chrono::steadyMSecs();
+
+    // Switch to that index
+    // All data will be in memory by the time it completes thanks to std::memory_order_seq_cst
+    m_index.fetch_xor(1, std::memory_order_seq_cst);
+}
+
+
+void xmrig::GpuWorker::hashrateData(uint64_t &hashCount, uint64_t &timeStamp, uint64_t &rawHashes) const
+{
+    const uint32_t index = m_index.load(std::memory_order_relaxed);
+
+    rawHashes = m_hashrateData.interpolate(timeStamp);
+    hashCount = m_hashCount[index];
+    timeStamp = m_timestamp[index];
+}
diff --git a/src/backend/common/GpuWorker.h b/src/backend/common/GpuWorker.h
new file mode 100644
index 00000000..3c828e52
--- /dev/null
+++ b/src/backend/common/GpuWorker.h
@@ -0,0 +1,58 @@
+/* XMRig
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef XMRIG_GPUWORKER_H
+#define XMRIG_GPUWORKER_H
+
+
+#include <atomic>
+
+
+#include "backend/common/HashrateInterpolator.h"
+#include "backend/common/Worker.h"
+
+
+namespace xmrig {
+
+
+class GpuWorker : public Worker
+{
+public:
+    GpuWorker(size_t id, int64_t affinity, int priority, uint32_t m_deviceIndex);
+
+protected:
+    inline const VirtualMemory *memory() const override     { return nullptr; }
+    inline uint32_t deviceIndex() const                     { return m_deviceIndex; }
+
+    void hashrateData(uint64_t &hashCount, uint64_t &timeStamp, uint64_t &rawHashes) const override;
+
+protected:
+    void storeStats();
+
+    const uint32_t m_deviceIndex;
+    HashrateInterpolator m_hashrateData;
+    std::atomic<uint32_t> m_index   = {};
+    uint64_t m_hashCount[2]         = {};
+    uint64_t m_timestamp[2]         = {};
+};
+
+
+} // namespace xmrig
+
+
+#endif /* XMRIG_GPUWORKER_H */
diff --git a/src/backend/common/Hashrate.cpp b/src/backend/common/Hashrate.cpp
index aa4d80c7..4038e34b 100644
--- a/src/backend/common/Hashrate.cpp
+++ b/src/backend/common/Hashrate.cpp
@@ -1,12 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,7 +19,6 @@
 
 
 #include <cassert>
-#include <cmath>
 #include <memory.h>
 #include <cstdio>
 
@@ -75,72 +69,6 @@ xmrig::Hashrate::~Hashrate()
 }
 
 
-double xmrig::Hashrate::calc(size_t ms) const
-{
-    const double data = calc(0, ms);
-    return std::isnormal(data) ? data : 0.0;
-}
-
-
-double xmrig::Hashrate::calc(size_t threadId, size_t ms) const
-{
-    assert(threadId < m_threads);
-    if (threadId >= m_threads) {
-        return nan("");
-    }
-
-    uint64_t earliestHashCount = 0;
-    uint64_t earliestStamp     = 0;
-    bool haveFullSet           = false;
-
-    const uint64_t timeStampLimit = xmrig::Chrono::steadyMSecs() - ms;
-    uint64_t* timestamps = m_timestamps[threadId];
-    uint64_t* counts = m_counts[threadId];
-
-    const size_t idx_start = (m_top[threadId] - 1) & kBucketMask;
-    size_t idx = idx_start;
-
-    uint64_t lastestStamp = timestamps[idx];
-    uint64_t lastestHashCnt = counts[idx];
-
-    do {
-        if (timestamps[idx] < timeStampLimit) {
-            haveFullSet = (timestamps[idx] != 0);
-            if (idx != idx_start) {
-                idx = (idx + 1) & kBucketMask;
-                earliestStamp = timestamps[idx];
-                earliestHashCount = counts[idx];
-            }
-            break;
-        }
-        idx = (idx - 1) & kBucketMask;
-    } while (idx != idx_start);
-
-    if (!haveFullSet || earliestStamp == 0 || lastestStamp == 0) {
-        return nan("");
-    }
-
-    if (lastestStamp - earliestStamp == 0) {
-        return nan("");
-    }
-
-    const auto hashes = static_cast<double>(lastestHashCnt - earliestHashCount);
-    const auto time   = static_cast<double>(lastestStamp - earliestStamp) / 1000.0;
-
-    return hashes / time;
-}
-
-
-void xmrig::Hashrate::add(size_t threadId, uint64_t count, uint64_t timestamp)
-{
-    const size_t top = m_top[threadId];
-    m_counts[threadId][top]     = count;
-    m_timestamps[threadId][top] = timestamp;
-
-    m_top[threadId] = (top + 1) & kBucketMask;
-}
-
-
 const char *xmrig::Hashrate::format(double h, char *buf, size_t size)
 {
     return ::format(h, buf, size);
@@ -174,10 +102,69 @@ rapidjson::Value xmrig::Hashrate::toJSON(size_t threadId, rapidjson::Document &d
     auto &allocator = doc.GetAllocator();
 
     Value out(kArrayType);
-    out.PushBack(normalize(calc(threadId + 1, ShortInterval)),  allocator);
-    out.PushBack(normalize(calc(threadId + 1, MediumInterval)), allocator);
-    out.PushBack(normalize(calc(threadId + 1, LargeInterval)),  allocator);
+    out.PushBack(normalize(calc(threadId, ShortInterval)),  allocator);
+    out.PushBack(normalize(calc(threadId, MediumInterval)), allocator);
+    out.PushBack(normalize(calc(threadId, LargeInterval)),  allocator);
 
     return out;
 }
 #endif
+
+
+double xmrig::Hashrate::hashrate(size_t index, size_t ms) const
+{
+    assert(index < m_threads);
+    if (index >= m_threads) {
+        return nan("");
+    }
+
+    uint64_t earliestHashCount = 0;
+    uint64_t earliestStamp     = 0;
+    bool haveFullSet           = false;
+
+    const uint64_t timeStampLimit = xmrig::Chrono::steadyMSecs() - ms;
+    uint64_t* timestamps          = m_timestamps[index];
+    uint64_t* counts              = m_counts[index];
+
+    const size_t idx_start  = (m_top[index] - 1) & kBucketMask;
+    size_t idx              = idx_start;
+
+    uint64_t lastestStamp   = timestamps[idx];
+    uint64_t lastestHashCnt = counts[idx];
+
+    do {
+        if (timestamps[idx] < timeStampLimit) {
+            haveFullSet = (timestamps[idx] != 0);
+            if (idx != idx_start) {
+                idx = (idx + 1) & kBucketMask;
+                earliestStamp = timestamps[idx];
+                earliestHashCount = counts[idx];
+            }
+            break;
+        }
+        idx = (idx - 1) & kBucketMask;
+    } while (idx != idx_start);
+
+    if (!haveFullSet || earliestStamp == 0 || lastestStamp == 0) {
+        return nan("");
+    }
+
+    if (lastestStamp - earliestStamp == 0) {
+        return nan("");
+    }
+
+    const auto hashes = static_cast<double>(lastestHashCnt - earliestHashCount);
+    const auto time   = static_cast<double>(lastestStamp - earliestStamp) / 1000.0;
+
+    return hashes / time;
+}
+
+
+void xmrig::Hashrate::addData(size_t index, uint64_t count, uint64_t timestamp)
+{
+    const size_t top         = m_top[index];
+    m_counts[index][top]     = count;
+    m_timestamps[index][top] = timestamp;
+
+    m_top[index] = (top + 1) & kBucketMask;
+}
diff --git a/src/backend/common/Hashrate.h b/src/backend/common/Hashrate.h
index 59e1afe1..ad278cfa 100644
--- a/src/backend/common/Hashrate.h
+++ b/src/backend/common/Hashrate.h
@@ -1,12 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,6 +21,7 @@
 #define XMRIG_HASHRATE_H
 
 
+#include <cmath>
 #include <cstddef>
 #include <cstdint>
 
@@ -42,7 +38,7 @@ class Hashrate
 public:
     XMRIG_DISABLE_COPY_MOVE_DEFAULT(Hashrate)
 
-    enum Intervals {
+    enum Intervals : size_t {
         ShortInterval  = 10000,
         MediumInterval = 60000,
         LargeInterval  = 900000
@@ -50,11 +46,12 @@ public:
 
     Hashrate(size_t threads);
     ~Hashrate();
-    double calc(size_t ms) const;
-    double calc(size_t threadId, size_t ms) const;
-    void add(size_t threadId, uint64_t count, uint64_t timestamp);
 
-    inline size_t threads() const { return m_threads; }
+    inline double calc(size_t ms) const                                     { const double data = hashrate(0U, ms); return std::isnormal(data) ? data : 0.0; }
+    inline double calc(size_t threadId, size_t ms) const                    { return hashrate(threadId + 1, ms); }
+    inline size_t threads() const                                           { return m_threads > 0U ? m_threads - 1U : 0U; }
+    inline void add(size_t threadId, uint64_t count, uint64_t timestamp)    { addData(threadId + 1U, count, timestamp); }
+    inline void add(uint64_t count, uint64_t timestamp)                     { addData(0U, count, timestamp); }
 
     static const char *format(double h, char *buf, size_t size);
     static rapidjson::Value normalize(double d);
@@ -65,6 +62,9 @@ public:
 #   endif
 
 private:
+    double hashrate(size_t index, size_t ms) const;
+    void addData(size_t index, uint64_t count, uint64_t timestamp);
+
     constexpr static size_t kBucketSize = 2 << 11;
     constexpr static size_t kBucketMask = kBucketSize - 1;
 
diff --git a/src/backend/common/HashrateInterpolator.cpp b/src/backend/common/HashrateInterpolator.cpp
index 2edda6a6..0ac11514 100644
--- a/src/backend/common/HashrateInterpolator.cpp
+++ b/src/backend/common/HashrateInterpolator.cpp
@@ -1,10 +1,4 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
  * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
  * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
diff --git a/src/backend/common/HashrateInterpolator.h b/src/backend/common/HashrateInterpolator.h
index b4c7b8c7..65e62443 100644
--- a/src/backend/common/HashrateInterpolator.h
+++ b/src/backend/common/HashrateInterpolator.h
@@ -1,10 +1,4 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
  * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
  * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
@@ -47,7 +41,7 @@ public:
 private:
     // Buffer of hashrate counters, used for linear interpolation of past data
     mutable std::mutex m_lock;
-    std::deque<std::pair<uint64_t, uint64_t>> m_data;
+    std::deque<std::pair<uint64_t, uint64_t> > m_data;
 };
 
 
diff --git a/src/backend/common/Worker.cpp b/src/backend/common/Worker.cpp
index cf244ab3..b24ac280 100644
--- a/src/backend/common/Worker.cpp
+++ b/src/backend/common/Worker.cpp
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,7 +19,6 @@
 
 #include "backend/common/Worker.h"
 #include "base/kernel/Platform.h"
-#include "base/tools/Chrono.h"
 #include "crypto/common/VirtualMemory.h"
 
 
@@ -39,27 +31,3 @@ xmrig::Worker::Worker(size_t id, int64_t affinity, int priority) :
     Platform::trySetThreadAffinity(affinity);
     Platform::setThreadPriority(priority);
 }
-
-
-void xmrig::Worker::storeStats()
-{
-    // Get index which is unused now
-    const uint32_t index = m_index.load(std::memory_order_relaxed) ^ 1;
-
-    // Fill in the data for that index
-    m_hashCount[index] = m_count;
-    m_timestamp[index] = Chrono::steadyMSecs();
-
-    // Switch to that index
-    // All data will be in memory by the time it completes thanks to std::memory_order_seq_cst
-    m_index.fetch_xor(1, std::memory_order_seq_cst);
-}
-
-
-void xmrig::Worker::getHashrateData(uint64_t& hashCount, uint64_t& timeStamp) const
-{
-    const uint32_t index = m_index.load(std::memory_order_relaxed);
-
-    hashCount = m_hashCount[index];
-    timeStamp = m_timestamp[index];
-}
diff --git a/src/backend/common/Worker.h b/src/backend/common/Worker.h
index 23c592b9..f4c12ea5 100644
--- a/src/backend/common/Worker.h
+++ b/src/backend/common/Worker.h
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -27,9 +20,6 @@
 #define XMRIG_WORKER_H
 
 
-#include <atomic>
-
-
 #include "backend/common/interfaces/IWorker.h"
 
 
@@ -41,23 +31,17 @@ class Worker : public IWorker
 public:
     Worker(size_t id, int64_t affinity, int priority);
 
-    inline const VirtualMemory *memory() const override   { return nullptr; }
-    inline size_t id() const override                     { return m_id; }
-    inline uint64_t rawHashes() const override            { return m_count; }
-    inline void jobEarlyNotification(const Job&) override {}
-
-    void getHashrateData(uint64_t& hashCount, uint64_t& timeStamp) const override;
-
 protected:
-    void storeStats();
+    inline int64_t affinity() const                         { return m_affinity; }
+    inline size_t id() const override                       { return m_id; }
+    inline uint32_t node() const                            { return m_node; }
 
+    uint64_t m_count                = 0;
+
+private:
     const int64_t m_affinity;
     const size_t m_id;
-    std::atomic<uint32_t> m_index   = {};
     uint32_t m_node                 = 0;
-    uint64_t m_count                = 0;
-    uint64_t m_hashCount[2]         = {};
-    uint64_t m_timestamp[2]         = {};
 };
 
 
diff --git a/src/backend/common/Workers.cpp b/src/backend/common/Workers.cpp
index 16265b0a..f015b5f7 100644
--- a/src/backend/common/Workers.cpp
+++ b/src/backend/common/Workers.cpp
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,16 +17,13 @@
  */
 
 
+#include "backend/common/Workers.h"
 #include "backend/common/Hashrate.h"
 #include "backend/common/interfaces/IBackend.h"
-#include "backend/common/Workers.h"
 #include "backend/cpu/CpuWorker.h"
 #include "base/io/log/Log.h"
 #include "base/io/log/Tags.h"
-#include "base/net/stratum/Pool.h"
 #include "base/tools/Chrono.h"
-#include "base/tools/Object.h"
-#include "core/Miner.h"
 
 
 #ifdef XMRIG_FEATURE_OPENCL
@@ -59,7 +49,6 @@ class WorkersPrivate
 public:
     XMRIG_DISABLE_COPY_MOVE(WorkersPrivate)
 
-
     WorkersPrivate()    = default;
     ~WorkersPrivate()   = default;
 
@@ -87,20 +76,6 @@ xmrig::Workers<T>::~Workers()
 }
 
 
-template<class T>
-static void getHashrateData(xmrig::IWorker* worker, uint64_t& hashCount, uint64_t& timeStamp)
-{
-    worker->getHashrateData(hashCount, timeStamp);
-}
-
-
-template<>
-void getHashrateData<xmrig::CpuLaunchData>(xmrig::IWorker* worker, uint64_t& hashCount, uint64_t&)
-{
-    hashCount = worker->rawHashes();
-}
-
-
 template<class T>
 bool xmrig::Workers<T>::tick(uint64_t)
 {
@@ -111,33 +86,32 @@ bool xmrig::Workers<T>::tick(uint64_t)
     uint64_t ts             = Chrono::steadyMSecs();
     bool totalAvailable     = true;
     uint64_t totalHashCount = 0;
+    uint64_t hashCount      = 0;
+    uint64_t rawHashes      = 0;
 
     for (Thread<T> *handle : m_workers) {
         IWorker *worker = handle->worker();
         if (worker) {
-            uint64_t hashCount;
-            getHashrateData<T>(worker, hashCount, ts);
-            d_ptr->hashrate->add(handle->id() + 1, hashCount, ts);
+            worker->hashrateData(hashCount, ts, rawHashes);
+            d_ptr->hashrate->add(handle->id(), hashCount, ts);
 
-            const uint64_t n = worker->rawHashes();
-            if (n == 0) {
+            if (rawHashes == 0) {
                 totalAvailable = false;
             }
-            totalHashCount += n;
+
+            totalHashCount += rawHashes;
         }
     }
 
     if (totalAvailable) {
-        d_ptr->hashrate->add(0, totalHashCount, Chrono::steadyMSecs());
+        d_ptr->hashrate->add(totalHashCount, Chrono::steadyMSecs());
     }
 
 #   ifdef XMRIG_FEATURE_BENCHMARK
-    if (d_ptr->benchmark && d_ptr->benchmark->finish(totalHashCount)) {
-        return false;
-    }
-#   endif
-
+    return !d_ptr->benchmark || !d_ptr->benchmark->finish(totalHashCount);
+#   else
     return true;
+#   endif
 }
 
 
@@ -158,14 +132,19 @@ void xmrig::Workers<T>::setBackend(IBackend *backend)
 template<class T>
 void xmrig::Workers<T>::stop()
 {
+#   ifdef XMRIG_MINER_PROJECT
     Nonce::stop(T::backend());
+#   endif
 
     for (Thread<T> *worker : m_workers) {
         delete worker;
     }
 
     m_workers.clear();
+
+#   ifdef XMRIG_MINER_PROJECT
     Nonce::touch(T::backend());
+#   endif
 
     d_ptr->hashrate.reset();
 }
@@ -226,7 +205,10 @@ void xmrig::Workers<T>::start(const std::vector<T> &data, bool sleep)
     }
 
     d_ptr->hashrate = std::make_shared<Hashrate>(m_workers.size());
+
+#   ifdef XMRIG_MINER_PROJECT
     Nonce::touch(T::backend());
+#   endif
 
     for (auto worker : m_workers) {
         worker->start(Workers<T>::onReady);
@@ -247,6 +229,7 @@ namespace xmrig {
 template<>
 xmrig::IWorker *xmrig::Workers<CpuLaunchData>::create(Thread<CpuLaunchData> *handle)
 {
+#   ifdef XMRIG_MINER_PROJECT
     switch (handle->config().intensity) {
     case 1:
         return new CpuWorker<1>(handle->id(), handle->config());
@@ -265,6 +248,11 @@ xmrig::IWorker *xmrig::Workers<CpuLaunchData>::create(Thread<CpuLaunchData> *han
     }
 
     return nullptr;
+#   else
+    assert(handle->config().intensity == 1);
+
+    return new CpuWorker<1>(handle->id(), handle->config());
+#   endif
 }
 
 
diff --git a/src/backend/common/Workers.h b/src/backend/common/Workers.h
index 5cdc78a2..1313384c 100644
--- a/src/backend/common/Workers.h
+++ b/src/backend/common/Workers.h
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -44,10 +37,9 @@
 namespace xmrig {
 
 
+class Benchmark;
 class Hashrate;
 class WorkersPrivate;
-class Job;
-class Benchmark;
 
 
 template<class T>
@@ -63,7 +55,7 @@ public:
 
     bool tick(uint64_t ticks);
     const Hashrate *hashrate() const;
-    void jobEarlyNotification(const Job&);
+    void jobEarlyNotification(const Job &job);
     void setBackend(IBackend *backend);
     void stop();
 
@@ -83,7 +75,7 @@ private:
 
 
 template<class T>
-void xmrig::Workers<T>::jobEarlyNotification(const Job& job)
+void xmrig::Workers<T>::jobEarlyNotification(const Job &job)
 {
     for (Thread<T>* t : m_workers) {
         if (t->worker()) {
diff --git a/src/backend/common/common.cmake b/src/backend/common/common.cmake
index 95c72440..52a5ee6f 100644
--- a/src/backend/common/common.cmake
+++ b/src/backend/common/common.cmake
@@ -1,6 +1,5 @@
 set(HEADERS_BACKEND_COMMON
     src/backend/common/Hashrate.h
-    src/backend/common/HashrateInterpolator.h
     src/backend/common/Tags.h
     src/backend/common/interfaces/IBackend.h
     src/backend/common/interfaces/IRxListener.h
@@ -16,7 +15,6 @@ set(HEADERS_BACKEND_COMMON
 
 set(SOURCES_BACKEND_COMMON
     src/backend/common/Hashrate.cpp
-    src/backend/common/HashrateInterpolator.cpp
     src/backend/common/Threads.cpp
     src/backend/common/Worker.cpp
     src/backend/common/Workers.cpp
@@ -35,3 +33,16 @@ if (WITH_RANDOMX AND WITH_BENCHMARK)
         src/backend/common/benchmark/BenchState.cpp
         )
 endif()
+
+
+if (WITH_OPENCL OR WITH_CUDA)
+    list(APPEND HEADERS_BACKEND_COMMON
+        src/backend/common/HashrateInterpolator.h
+        src/backend/common/GpuWorker.h
+        )
+
+    list(APPEND SOURCES_BACKEND_COMMON
+        src/backend/common/HashrateInterpolator.cpp
+        src/backend/common/GpuWorker.cpp
+        )
+endif()
diff --git a/src/backend/common/interfaces/IBackend.h b/src/backend/common/interfaces/IBackend.h
index c07ee49a..53e8e0f1 100644
--- a/src/backend/common/interfaces/IBackend.h
+++ b/src/backend/common/interfaces/IBackend.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,10 +20,11 @@
 #define XMRIG_IBACKEND_H
 
 
-#include <cstdint>
-
-
 #include "3rdparty/rapidjson/fwd.h"
+#include "base/tools/Object.h"
+
+
+#include <cstdint>
 
 
 namespace xmrig {
@@ -47,10 +42,14 @@ class String;
 class IBackend
 {
 public:
+    XMRIG_DISABLE_COPY_MOVE(IBackend)
+
+    IBackend()          = default;
     virtual ~IBackend() = default;
 
     virtual bool isEnabled() const                                      = 0;
     virtual bool isEnabled(const Algorithm &algorithm) const            = 0;
+    virtual bool tick(uint64_t ticks)                                   = 0;
     virtual const Hashrate *hashrate() const                            = 0;
     virtual const String &profileName() const                           = 0;
     virtual const String &type() const                                  = 0;
@@ -61,7 +60,6 @@ public:
     virtual void setJob(const Job &job)                                 = 0;
     virtual void start(IWorker *worker, bool ready)                     = 0;
     virtual void stop()                                                 = 0;
-    virtual bool tick(uint64_t ticks)                                   = 0;
 
 #   ifdef XMRIG_FEATURE_API
     virtual rapidjson::Value toJSON(rapidjson::Document &doc) const     = 0;
diff --git a/src/backend/common/interfaces/IMemoryPool.h b/src/backend/common/interfaces/IMemoryPool.h
index 44ff2495..10d27b50 100644
--- a/src/backend/common/interfaces/IMemoryPool.h
+++ b/src/backend/common/interfaces/IMemoryPool.h
@@ -1,14 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -28,6 +20,9 @@
 #define XMRIG_IMEMORYPOOL_H
 
 
+#include "base/tools/Object.h"
+
+
 #include <cstddef>
 #include <cstdint>
 
@@ -38,7 +33,10 @@ namespace xmrig {
 class IMemoryPool
 {
 public:
-    virtual ~IMemoryPool() = default;
+    XMRIG_DISABLE_COPY_MOVE(IMemoryPool)
+
+    IMemoryPool()           = default;
+    virtual ~IMemoryPool()  = default;
 
     virtual bool isHugePages(uint32_t node) const       = 0;
     virtual uint8_t *get(size_t size, uint32_t node)    = 0;
diff --git a/src/backend/common/interfaces/IRxListener.h b/src/backend/common/interfaces/IRxListener.h
index b4dde9e5..11adb0d4 100644
--- a/src/backend/common/interfaces/IRxListener.h
+++ b/src/backend/common/interfaces/IRxListener.h
@@ -1,10 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2016-2018 XMRig       <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,13 +21,19 @@
 #define XMRIG_IRXLISTENER_H
 
 
+#include "base/tools/Object.h"
+
+
 namespace xmrig {
 
 
 class IRxListener
 {
 public:
-    virtual ~IRxListener() = default;
+    XMRIG_DISABLE_COPY_MOVE(IRxListener)
+
+    IRxListener()           = default;
+    virtual ~IRxListener()  = default;
 
 #   ifdef XMRIG_ALGO_RANDOMX
     virtual void onDatasetReady() = 0;
diff --git a/src/backend/common/interfaces/IRxStorage.h b/src/backend/common/interfaces/IRxStorage.h
index ff447044..ab287a76 100644
--- a/src/backend/common/interfaces/IRxStorage.h
+++ b/src/backend/common/interfaces/IRxStorage.h
@@ -1,10 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2016-2018 XMRig       <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,8 +21,9 @@
 #define XMRIG_IRXSTORAGE_H
 
 
-#include "crypto/rx/RxConfig.h"
+#include "base/tools/Object.h"
 #include "crypto/common/HugePagesInfo.h"
+#include "crypto/rx/RxConfig.h"
 
 
 #include <cstdint>
@@ -43,7 +41,10 @@ class RxSeed;
 class IRxStorage
 {
 public:
-    virtual ~IRxStorage() = default;
+    XMRIG_DISABLE_COPY_MOVE(IRxStorage)
+
+    IRxStorage()            = default;
+    virtual ~IRxStorage()   = default;
 
     virtual bool isAllocated() const                                                                                            = 0;
     virtual HugePagesInfo hugePages() const                                                                                     = 0;
diff --git a/src/backend/common/interfaces/IWorker.h b/src/backend/common/interfaces/IWorker.h
index f528469a..7ed6ff00 100644
--- a/src/backend/common/interfaces/IWorker.h
+++ b/src/backend/common/interfaces/IWorker.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -36,8 +30,8 @@
 namespace xmrig {
 
 
-class VirtualMemory;
 class Job;
+class VirtualMemory;
 
 
 class IWorker
@@ -48,14 +42,13 @@ public:
     IWorker()           = default;
     virtual ~IWorker()  = default;
 
-    virtual bool selfTest()                                   = 0;
-    virtual const VirtualMemory *memory() const               = 0;
-    virtual size_t id() const                                 = 0;
-    virtual size_t intensity() const                          = 0;
-    virtual uint64_t rawHashes() const                        = 0;
-    virtual void getHashrateData(uint64_t&, uint64_t&) const  = 0;
-    virtual void start()                                      = 0;
-    virtual void jobEarlyNotification(const Job&)             = 0;
+    virtual bool selfTest()                                                                         = 0;
+    virtual const VirtualMemory *memory() const                                                     = 0;
+    virtual size_t id() const                                                                       = 0;
+    virtual size_t intensity() const                                                                = 0;
+    virtual void hashrateData(uint64_t &hashCount, uint64_t &timeStamp, uint64_t &rawHashes) const  = 0;
+    virtual void jobEarlyNotification(const Job &job)                                               = 0;
+    virtual void start()                                                                            = 0;
 };
 
 
diff --git a/src/backend/cpu/CpuBackend.cpp b/src/backend/cpu/CpuBackend.cpp
index fc6b7e74..1e47a6c5 100644
--- a/src/backend/cpu/CpuBackend.cpp
+++ b/src/backend/cpu/CpuBackend.cpp
@@ -266,6 +266,12 @@ bool xmrig::CpuBackend::isEnabled(const Algorithm &algorithm) const
 }
 
 
+bool xmrig::CpuBackend::tick(uint64_t ticks)
+{
+    return d_ptr->workers.tick(ticks);
+}
+
+
 const xmrig::Hashrate *xmrig::CpuBackend::hashrate() const
 {
     return d_ptr->workers.hashrate();
@@ -316,9 +322,9 @@ void xmrig::CpuBackend::printHashrate(bool details)
          Log::print("| %8zu | %8" PRId64 " | %7s | %7s | %7s |",
                     i,
                     data.affinity,
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::ShortInterval),  num,         sizeof num / 3),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::MediumInterval), num + 8,     sizeof num / 3),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::LargeInterval),  num + 8 * 2, sizeof num / 3)
+                    Hashrate::format(hashrate()->calc(i, Hashrate::ShortInterval),  num,         sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::MediumInterval), num + 8,     sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::LargeInterval),  num + 8 * 2, sizeof num / 3)
                     );
 
          i++;
@@ -405,12 +411,6 @@ void xmrig::CpuBackend::stop()
 }
 
 
-bool xmrig::CpuBackend::tick(uint64_t ticks)
-{
-    return d_ptr->workers.tick(ticks);
-}
-
-
 #ifdef XMRIG_FEATURE_API
 rapidjson::Value xmrig::CpuBackend::toJSON(rapidjson::Document &doc) const
 {
diff --git a/src/backend/cpu/CpuBackend.h b/src/backend/cpu/CpuBackend.h
index 5be933c3..2f697b8b 100644
--- a/src/backend/cpu/CpuBackend.h
+++ b/src/backend/cpu/CpuBackend.h
@@ -54,6 +54,7 @@ protected:
 
     bool isEnabled() const override;
     bool isEnabled(const Algorithm &algorithm) const override;
+    bool tick(uint64_t ticks) override;
     const Hashrate *hashrate() const override;
     const String &profileName() const override;
     const String &type() const override;
@@ -63,7 +64,6 @@ protected:
     void setJob(const Job &job) override;
     void start(IWorker *worker, bool ready) override;
     void stop() override;
-    bool tick(uint64_t ticks) override;
 
 #   ifdef XMRIG_FEATURE_API
     rapidjson::Value toJSON(rapidjson::Document &doc) const override;
diff --git a/src/backend/cpu/CpuWorker.cpp b/src/backend/cpu/CpuWorker.cpp
index 778f8e46..f55d153c 100644
--- a/src/backend/cpu/CpuWorker.cpp
+++ b/src/backend/cpu/CpuWorker.cpp
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -80,7 +73,7 @@ xmrig::CpuWorker<N>::CpuWorker(size_t id, const CpuLaunchData &data) :
     m_threads(data.threads),
     m_ctx()
 {
-    m_memory = new VirtualMemory(m_algorithm.l3() * N, data.hugePages, false, true, m_node);
+    m_memory = new VirtualMemory(m_algorithm.l3() * N, data.hugePages, false, true, node());
 }
 
 
@@ -100,7 +93,7 @@ xmrig::CpuWorker<N>::~CpuWorker()
 template<size_t N>
 void xmrig::CpuWorker<N>::allocateRandomX_VM()
 {
-    RxDataset *dataset = Rx::dataset(m_job.currentJob(), m_node);
+    RxDataset *dataset = Rx::dataset(m_job.currentJob(), node());
 
     while (dataset == nullptr) {
         std::this_thread::sleep_for(std::chrono::milliseconds(200));
@@ -109,13 +102,13 @@ void xmrig::CpuWorker<N>::allocateRandomX_VM()
             return;
         }
 
-        dataset = Rx::dataset(m_job.currentJob(), m_node);
+        dataset = Rx::dataset(m_job.currentJob(), node());
     }
 
     if (!m_vm) {
         // Try to allocate scratchpad from dataset's 1 GB huge pages, if normal huge pages are not available
         uint8_t* scratchpad = m_memory->isHugePages() ? m_memory->scratchpad() : dataset->tryAllocateScrathpad();
-        m_vm = RxVm::create(dataset, scratchpad ? scratchpad : m_memory->scratchpad(), !m_hwAES, m_assembly, m_node);
+        m_vm = RxVm::create(dataset, scratchpad ? scratchpad : m_memory->scratchpad(), !m_hwAES, m_assembly, node());
     }
 }
 #endif
@@ -189,6 +182,14 @@ bool xmrig::CpuWorker<N>::selfTest()
 }
 
 
+template<size_t N>
+void xmrig::CpuWorker<N>::hashrateData(uint64_t &hashCount, uint64_t &, uint64_t &rawHashes) const
+{
+    hashCount = m_count;
+    rawHashes = m_count;
+}
+
+
 template<size_t N>
 void xmrig::CpuWorker<N>::start()
 {
diff --git a/src/backend/cpu/CpuWorker.h b/src/backend/cpu/CpuWorker.h
index 06c92fa4..785763af 100644
--- a/src/backend/cpu/CpuWorker.h
+++ b/src/backend/cpu/CpuWorker.h
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -56,10 +49,12 @@ public:
 
 protected:
     bool selfTest() override;
+    void hashrateData(uint64_t &hashCount, uint64_t &timeStamp, uint64_t &rawHashes) const override;
     void start() override;
 
-    inline const VirtualMemory *memory() const override { return m_memory; }
-    inline size_t intensity() const override            { return N; }
+    inline const VirtualMemory *memory() const override     { return m_memory; }
+    inline size_t intensity() const override                { return N; }
+    inline void jobEarlyNotification(const Job&) override   {}
 
 private:
     inline cn_hash_fun fn(const Algorithm &algorithm) const { return CnHash::fn(algorithm, m_av, m_assembly); }
diff --git a/src/backend/cpu/interfaces/ICpuInfo.h b/src/backend/cpu/interfaces/ICpuInfo.h
index 9270ca09..7464781a 100644
--- a/src/backend/cpu/interfaces/ICpuInfo.h
+++ b/src/backend/cpu/interfaces/ICpuInfo.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/backend/cpu/platform/HwlocCpuInfo.cpp b/src/backend/cpu/platform/HwlocCpuInfo.cpp
index 0d587332..6f6cb4b7 100644
--- a/src/backend/cpu/platform/HwlocCpuInfo.cpp
+++ b/src/backend/cpu/platform/HwlocCpuInfo.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/backend/cpu/platform/HwlocCpuInfo.h b/src/backend/cpu/platform/HwlocCpuInfo.h
index eed3ae8b..1a24f425 100644
--- a/src/backend/cpu/platform/HwlocCpuInfo.h
+++ b/src/backend/cpu/platform/HwlocCpuInfo.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/backend/cuda/CudaBackend.cpp b/src/backend/cuda/CudaBackend.cpp
index ab5b22e5..59eaab1f 100644
--- a/src/backend/cuda/CudaBackend.cpp
+++ b/src/backend/cuda/CudaBackend.cpp
@@ -409,9 +409,9 @@ void xmrig::CudaBackend::printHashrate(bool details)
          Log::print("| %8zu | %8" PRId64 " | %8s | %8s | %8s |" CYAN_BOLD(" #%u") YELLOW(" %s") GREEN(" %s"),
                     i,
                     data.thread.affinity(),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::ShortInterval)  * scale, num,          sizeof num / 3),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::MediumInterval) * scale, num + 16,      sizeof num / 3),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::LargeInterval)  * scale, num + 16 * 2, sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::ShortInterval)  * scale, num,          sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::MediumInterval) * scale, num + 16,      sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::LargeInterval)  * scale, num + 16 * 2, sizeof num / 3),
                     data.device.index(),
                     data.device.topology().toString().data(),
                     data.device.name().data()
diff --git a/src/backend/cuda/CudaWorker.cpp b/src/backend/cuda/CudaWorker.cpp
index 7bb8844c..3585308f 100644
--- a/src/backend/cuda/CudaWorker.cpp
+++ b/src/backend/cuda/CudaWorker.cpp
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -61,7 +54,7 @@ static constexpr uint32_t kReserveCount = 32768;
 std::atomic<bool> CudaWorker::ready;
 
 
-static inline bool isReady()                         { return !Nonce::isPaused() && CudaWorker::ready; }
+static inline bool isReady()    { return !Nonce::isPaused() && CudaWorker::ready; }
 
 
 } // namespace xmrig
@@ -69,10 +62,9 @@ static inline bool isReady()                         { return !Nonce::isPaused()
 
 
 xmrig::CudaWorker::CudaWorker(size_t id, const CudaLaunchData &data) :
-    Worker(id, data.thread.affinity(), -1),
+    GpuWorker(id, data.thread.affinity(), -1, data.device.index()),
     m_algorithm(data.algorithm),
-    m_miner(data.miner),
-    m_deviceIndex(data.device.index())
+    m_miner(data.miner)
 {
     switch (m_algorithm.family()) {
     case Algorithm::RANDOM_X:
@@ -119,13 +111,7 @@ xmrig::CudaWorker::~CudaWorker()
 }
 
 
-uint64_t xmrig::CudaWorker::rawHashes() const
-{
-    return m_hashrateData.interpolate(Chrono::steadyMSecs());
-}
-
-
-void xmrig::CudaWorker::jobEarlyNotification(const Job& job)
+void xmrig::CudaWorker::jobEarlyNotification(const Job &job)
 {
     if (m_runner) {
         m_runner->jobEarlyNotification(job);
@@ -213,5 +199,5 @@ void xmrig::CudaWorker::storeStats()
     const uint64_t timeStamp = Chrono::steadyMSecs();
     m_hashrateData.addDataPoint(m_count, timeStamp);
 
-    Worker::storeStats();
+    GpuWorker::storeStats();
 }
diff --git a/src/backend/cuda/CudaWorker.h b/src/backend/cuda/CudaWorker.h
index e82e3425..24cf1e65 100644
--- a/src/backend/cuda/CudaWorker.h
+++ b/src/backend/cuda/CudaWorker.h
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -27,8 +20,7 @@
 #define XMRIG_CUDAWORKER_H
 
 
-#include "backend/common/HashrateInterpolator.h"
-#include "backend/common/Worker.h"
+#include "backend/common/GpuWorker.h"
 #include "backend/common/WorkerJob.h"
 #include "backend/cuda/CudaLaunchData.h"
 #include "base/tools/Object.h"
@@ -41,7 +33,7 @@ namespace xmrig {
 class ICudaRunner;
 
 
-class CudaWorker : public Worker
+class CudaWorker : public GpuWorker
 {
 public:
     XMRIG_DISABLE_COPY_MOVE_DEFAULT(CudaWorker)
@@ -50,8 +42,7 @@ public:
 
     ~CudaWorker() override;
 
-    uint64_t rawHashes() const override;
-    void jobEarlyNotification(const Job&) override;
+    void jobEarlyNotification(const Job &job) override;
 
     static std::atomic<bool> ready;
 
@@ -68,9 +59,6 @@ private:
     const Miner *m_miner;
     ICudaRunner *m_runner = nullptr;
     WorkerJob<1> m_job;
-    uint32_t m_deviceIndex;
-
-    HashrateInterpolator m_hashrateData;
 };
 
 
diff --git a/src/backend/opencl/OclBackend.cpp b/src/backend/opencl/OclBackend.cpp
index 7b99700b..d0d04f37 100644
--- a/src/backend/opencl/OclBackend.cpp
+++ b/src/backend/opencl/OclBackend.cpp
@@ -385,9 +385,9 @@ void xmrig::OclBackend::printHashrate(bool details)
          Log::print("| %8zu | %8" PRId64 " | %8s | %8s | %8s |" CYAN_BOLD(" #%u") YELLOW(" %s") " %s",
                     i,
                     data.affinity,
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::ShortInterval)  * scale, num,          sizeof num / 3),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::MediumInterval) * scale, num + 16,     sizeof num / 3),
-                    Hashrate::format(hashrate()->calc(i + 1, Hashrate::LargeInterval)  * scale, num + 16 * 2, sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::ShortInterval)  * scale, num,          sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::MediumInterval) * scale, num + 16,     sizeof num / 3),
+                    Hashrate::format(hashrate()->calc(i, Hashrate::LargeInterval)  * scale, num + 16 * 2, sizeof num / 3),
                     data.device.index(),
                     data.device.topology().toString().data(),
                     data.device.printableName().data()
diff --git a/src/backend/opencl/OclWorker.cpp b/src/backend/opencl/OclWorker.cpp
index ac493ab5..ee5c4a04 100644
--- a/src/backend/opencl/OclWorker.cpp
+++ b/src/backend/opencl/OclWorker.cpp
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -59,7 +52,7 @@ namespace xmrig {
 std::atomic<bool> OclWorker::ready;
 
 
-static inline bool isReady()                         { return !Nonce::isPaused() && OclWorker::ready; }
+static inline bool isReady()    { return !Nonce::isPaused() && OclWorker::ready; }
 
 
 static inline void printError(size_t id, const char *error)
@@ -73,11 +66,10 @@ static inline void printError(size_t id, const char *error)
 
 
 xmrig::OclWorker::OclWorker(size_t id, const OclLaunchData &data) :
-    Worker(id, data.affinity, -1),
+    GpuWorker(id, data.affinity, -1, data.device.index()),
     m_algorithm(data.algorithm),
     m_miner(data.miner),
-    m_sharedData(OclSharedState::get(data.device.index())),
-    m_deviceIndex(data.device.index())
+    m_sharedData(OclSharedState::get(data.device.index()))
 {
     switch (m_algorithm.family()) {
     case Algorithm::RANDOM_X:
@@ -137,13 +129,7 @@ xmrig::OclWorker::~OclWorker()
 }
 
 
-uint64_t xmrig::OclWorker::rawHashes() const
-{
-    return m_hashrateData.interpolate(Chrono::steadyMSecs());
-}
-
-
-void xmrig::OclWorker::jobEarlyNotification(const Job& job)
+void xmrig::OclWorker::jobEarlyNotification(const Job &job)
 {
     if (m_runner) {
         m_runner->jobEarlyNotification(job);
@@ -180,7 +166,7 @@ void xmrig::OclWorker::start()
                 break;
             }
 
-            m_sharedData.resumeDelay(m_id);
+            m_sharedData.resumeDelay(id());
 
             if (!consumeJob()) {
                 return;
@@ -188,7 +174,7 @@ void xmrig::OclWorker::start()
         }
 
         while (!Nonce::isOutdated(Nonce::OPENCL, m_job.sequence())) {
-            m_sharedData.adjustDelay(m_id);
+            m_sharedData.adjustDelay(id());
 
             const uint64_t t = Chrono::steadyMSecs();
 
@@ -254,5 +240,5 @@ void xmrig::OclWorker::storeStats(uint64_t t)
 
     m_sharedData.setRunTime(timeStamp - t);
 
-    Worker::storeStats();
+    GpuWorker::storeStats();
 }
diff --git a/src/backend/opencl/OclWorker.h b/src/backend/opencl/OclWorker.h
index 403a0765..4dfe2a77 100644
--- a/src/backend/opencl/OclWorker.h
+++ b/src/backend/opencl/OclWorker.h
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -27,8 +20,7 @@
 #define XMRIG_OCLWORKER_H
 
 
-#include "backend/common/HashrateInterpolator.h"
-#include "backend/common/Worker.h"
+#include "backend/common/GpuWorker.h"
 #include "backend/common/WorkerJob.h"
 #include "backend/opencl/OclLaunchData.h"
 #include "base/tools/Object.h"
@@ -42,7 +34,7 @@ class IOclRunner;
 class Job;
 
 
-class OclWorker : public Worker
+class OclWorker : public GpuWorker
 {
 public:
     XMRIG_DISABLE_COPY_MOVE_DEFAULT(OclWorker)
@@ -51,8 +43,7 @@ public:
 
     ~OclWorker() override;
 
-    uint64_t rawHashes() const override;
-    void jobEarlyNotification(const Job&) override;
+    void jobEarlyNotification(const Job &job) override;
 
     static std::atomic<bool> ready;
 
@@ -70,9 +61,6 @@ private:
     IOclRunner *m_runner = nullptr;
     OclSharedData &m_sharedData;
     WorkerJob<1> m_job;
-    uint32_t m_deviceIndex;
-
-    HashrateInterpolator m_hashrateData;
 };
 
 
diff --git a/src/base/api/Api.cpp b/src/base/api/Api.cpp
index 85c9dd60..4baebbf3 100644
--- a/src/base/api/Api.cpp
+++ b/src/base/api/Api.cpp
@@ -34,8 +34,8 @@
 #include "base/io/Env.h"
 #include "base/io/json/Json.h"
 #include "base/kernel/Base.h"
-#include "base/tools/Buffer.h"
 #include "base/tools/Chrono.h"
+#include "base/tools/Cvt.h"
 #include "core/config/Config.h"
 #include "core/Controller.h"
 #include "version.h"
@@ -222,13 +222,13 @@ void xmrig::Api::genId(const String &id)
             const size_t inSize   = (sizeof(APP_KIND) - 1) + addrSize + sizeof(uint16_t);
             const auto port       = static_cast<uint16_t>(m_base->config()->http().port());
 
-            auto*input = new uint8_t[inSize]();
+            auto *input = new uint8_t[inSize]();
             memcpy(input, &port, sizeof(uint16_t));
             memcpy(input + sizeof(uint16_t), interfaces[i].phys_addr, addrSize);
             memcpy(input + sizeof(uint16_t) + addrSize, APP_KIND, (sizeof(APP_KIND) - 1));
 
             keccak(input, inSize, hash);
-            Buffer::toHex(hash, 8, m_id);
+            Cvt::toHex(m_id, sizeof(m_id), hash, 8);
 
             delete [] input;
             break;
diff --git a/src/base/base.cmake b/src/base/base.cmake
index 04506927..cd6ee88b 100644
--- a/src/base/base.cmake
+++ b/src/base/base.cmake
@@ -22,6 +22,7 @@ set(HEADERS_BASE
     src/base/kernel/config/BaseConfig.h
     src/base/kernel/config/BaseTransform.h
     src/base/kernel/config/Title.h
+    src/base/kernel/constants.h
     src/base/kernel/Entry.h
     src/base/kernel/interfaces/IAsyncListener.h
     src/base/kernel/interfaces/IBaseListener.h
@@ -66,6 +67,7 @@ set(HEADERS_BASE
     src/base/tools/Baton.h
     src/base/tools/Buffer.h
     src/base/tools/Chrono.h
+    src/base/tools/Cvt.h
     src/base/tools/Handle.h
     src/base/tools/String.h
     src/base/tools/Timer.h
@@ -113,7 +115,7 @@ set(SOURCES_BASE
     src/base/net/tools/LineReader.cpp
     src/base/net/tools/NetBuffer.cpp
     src/base/tools/Arguments.cpp
-    src/base/tools/Buffer.cpp
+    src/base/tools/Cvt.cpp
     src/base/tools/String.cpp
     src/base/tools/Timer.cpp
    )
@@ -230,13 +232,6 @@ if (WITH_KAWPOW)
         )
 endif()
 
-if (WITH_PROFILING)
-    add_definitions(/DXMRIG_FEATURE_PROFILING)
-
-    list(APPEND HEADERS_BASE src/base/tools/Profiler.h)
-    list(APPEND SOURCES_BASE src/base/tools/Profiler.cpp)
-endif()
-
 
 if (WITH_RANDOMX AND WITH_BENCHMARK)
     add_definitions(/DXMRIG_FEATURE_BENCHMARK)
diff --git a/src/base/io/Console.cpp b/src/base/io/Console.cpp
index bba73035..5af7e4a4 100644
--- a/src/base/io/Console.cpp
+++ b/src/base/io/Console.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -50,20 +44,9 @@ xmrig::Console::Console(IConsoleListener *listener)
 
 xmrig::Console::~Console()
 {
-    stop();
-}
-
-
-void xmrig::Console::stop()
-{
-    if (!m_tty) {
-        return;
-    }
-
     uv_tty_reset_mode();
 
     Handle::close(m_tty);
-    m_tty = nullptr;
 }
 
 
diff --git a/src/base/io/Console.h b/src/base/io/Console.h
index 0a075348..65523b94 100644
--- a/src/base/io/Console.h
+++ b/src/base/io/Console.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,7 +23,16 @@
 #include "base/tools/Object.h"
 
 
-#include <uv.h>
+using uv_buf_t      = struct uv_buf_t;
+using uv_handle_t   = struct uv_handle_s;
+using uv_stream_t   = struct uv_stream_s;
+using uv_tty_t      = struct uv_tty_s;
+
+#ifdef XMRIG_OS_WIN
+using ssize_t = intptr_t;
+#else
+#   include <sys/types.h>
+#endif
 
 
 namespace xmrig {
@@ -46,8 +49,6 @@ public:
     Console(IConsoleListener *listener);
     ~Console();
 
-    void stop();
-
 private:
     bool isSupported() const;
 
diff --git a/src/base/io/Signals.cpp b/src/base/io/Signals.cpp
index 00ec8c17..dfe4a89b 100644
--- a/src/base/io/Signals.cpp
+++ b/src/base/io/Signals.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -23,23 +17,30 @@
  */
 
 
-#include <uv.h>
-
-
-#include "base/io/Signals.h"
 #include "base/kernel/interfaces/ISignalListener.h"
+#include "base/io/log/Log.h"
+#include "base/io/log/Tags.h"
+#include "base/io/Signals.h"
 #include "base/tools/Handle.h"
 
 
+#ifdef SIGUSR1
+static const int signums[xmrig::Signals::kSignalsCount] = { SIGHUP, SIGINT, SIGTERM, SIGUSR1 };
+#else
 static const int signums[xmrig::Signals::kSignalsCount] = { SIGHUP, SIGINT, SIGTERM };
+#endif
 
 
 xmrig::Signals::Signals(ISignalListener *listener)
     : m_listener(listener)
 {
+#   ifndef XMRIG_OS_WIN
+    signal(SIGPIPE, SIG_IGN);
+#   endif
+
     for (size_t i = 0; i < kSignalsCount; ++i) {
-        uv_signal_t *signal = new uv_signal_t;
-        signal->data        = this;
+        auto signal  = new uv_signal_t;
+        signal->data = this;
 
         m_signals[i] = signal;
 
@@ -51,24 +52,37 @@ xmrig::Signals::Signals(ISignalListener *listener)
 
 xmrig::Signals::~Signals()
 {
-    stop();
-}
-
-
-void xmrig::Signals::stop()
-{
-    if (!m_signals[0]) {
-        return;
-    }
-
-    for (size_t i = 0; i < kSignalsCount; ++i) {
-        Handle::close(m_signals[i]);
-        m_signals[i] = nullptr;
+    for (auto signal : m_signals) {
+        Handle::close(signal);
     }
 }
 
 
 void xmrig::Signals::onSignal(uv_signal_t *handle, int signum)
 {
+    switch (signum)
+    {
+    case SIGHUP:
+        LOG_WARN("%s " YELLOW("SIGHUP received, exiting"), Tags::signal());
+        break;
+
+    case SIGTERM:
+        LOG_WARN("%s " YELLOW("SIGTERM received, exiting"), Tags::signal());
+        break;
+
+    case SIGINT:
+        LOG_WARN("%s " YELLOW("SIGINT received, exiting"), Tags::signal());
+        break;
+
+#   ifdef SIGUSR1
+    case SIGUSR1:
+        LOG_V5("%s " WHITE_BOLD("SIGUSR1 received"), Tags::signal());
+        break;
+#   endif
+
+    default:
+        break;
+    }
+
     static_cast<Signals *>(handle->data)->m_listener->onSignal(signum);
 }
diff --git a/src/base/io/Signals.h b/src/base/io/Signals.h
index 9b4a870a..56be5889 100644
--- a/src/base/io/Signals.h
+++ b/src/base/io/Signals.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,10 +20,14 @@
 #define XMRIG_SIGNALS_H
 
 
-#include <stddef.h>
+#include "base/tools/Object.h"
 
 
-typedef struct uv_signal_s uv_signal_t;
+#include <csignal>
+#include <cstddef>
+
+
+using uv_signal_t = struct uv_signal_s;
 
 
 namespace xmrig {
@@ -41,20 +39,24 @@ class ISignalListener;
 class Signals
 {
 public:
+    XMRIG_DISABLE_COPY_MOVE_DEFAULT(Signals)
+
+#   ifdef SIGUSR1
+    constexpr static const size_t kSignalsCount = 4;
+#   else
     constexpr static const size_t kSignalsCount = 3;
+#   endif
 
     Signals(ISignalListener *listener);
     ~Signals();
 
-    void stop();
-
 private:
     void close(int signum);
 
     static void onSignal(uv_signal_t *handle, int signum);
 
     ISignalListener *m_listener;
-    uv_signal_t *m_signals[kSignalsCount];
+    uv_signal_t *m_signals[kSignalsCount]{};
 };
 
 
diff --git a/src/base/io/json/Json.cpp b/src/base/io/json/Json.cpp
index a9be7dc3..99a087e9 100644
--- a/src/base/io/json/Json.cpp
+++ b/src/base/io/json/Json.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,6 +23,7 @@
 
 #include <cassert>
 #include <cmath>
+#include <istream>
 
 
 namespace xmrig {
@@ -119,6 +114,21 @@ const rapidjson::Value &xmrig::Json::getValue(const rapidjson::Value &obj, const
 }
 
 
+double xmrig::Json::getDouble(const rapidjson::Value &obj, const char *key, double defaultValue)
+{
+    if (isEmpty(obj)) {
+        return defaultValue;
+    }
+
+    auto i = obj.FindMember(key);
+    if (i != obj.MemberEnd() && (i->value.IsDouble() || i->value.IsLosslessDouble())) {
+        return i->value.GetDouble();
+    }
+
+    return defaultValue;
+}
+
+
 int xmrig::Json::getInt(const rapidjson::Value &obj, const char *key, int defaultValue)
 {
     if (isEmpty(obj)) {
@@ -149,6 +159,25 @@ int64_t xmrig::Json::getInt64(const rapidjson::Value &obj, const char *key, int6
 }
 
 
+xmrig::String xmrig::Json::getString(const rapidjson::Value &obj, const char *key, size_t maxSize)
+{
+    if (isEmpty(obj)) {
+        return {};
+    }
+
+    auto i = obj.FindMember(key);
+    if (i == obj.MemberEnd() || !i->value.IsString()) {
+        return {};
+    }
+
+    if (maxSize == 0 || i->value.GetStringLength() <= maxSize) {
+        return i->value.GetString();
+    }
+
+    return { i->value.GetString(), maxSize };
+}
+
+
 uint64_t xmrig::Json::getUint64(const rapidjson::Value &obj, const char *key, uint64_t defaultValue)
 {
     if (isEmpty(obj)) {
@@ -222,6 +251,11 @@ bool xmrig::Json::convertOffset(std::istream &ifs, size_t offset, size_t &line,
 }
 
 
+xmrig::JsonReader::JsonReader() :
+    m_obj(kNullValue)
+{}
+
+
 bool xmrig::JsonReader::isEmpty() const
 {
     return Json::isEmpty(m_obj);
diff --git a/src/base/io/json/Json.h b/src/base/io/json/Json.h
index 683eb308..e5d0fcc6 100644
--- a/src/base/io/json/Json.h
+++ b/src/base/io/json/Json.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,13 +20,10 @@
 #define XMRIG_JSON_H
 
 
-#include "3rdparty/rapidjson/fwd.h"
 #include "base/kernel/interfaces/IJsonReader.h"
 
 
 #include <string>
-#include <vector>
-#include <fstream>
 
 
 namespace xmrig {
@@ -47,8 +38,10 @@ public:
     static const rapidjson::Value &getArray(const rapidjson::Value &obj, const char *key);
     static const rapidjson::Value &getObject(const rapidjson::Value &obj, const char *key);
     static const rapidjson::Value &getValue(const rapidjson::Value &obj, const char *key);
+    static double getDouble(const rapidjson::Value &obj, const char *key, double defaultValue = 0);
     static int getInt(const rapidjson::Value &obj, const char *key, int defaultValue = 0);
     static int64_t getInt64(const rapidjson::Value &obj, const char *key, int64_t defaultValue = 0);
+    static String getString(const rapidjson::Value &obj, const char *key, size_t maxSize);
     static uint64_t getUint64(const rapidjson::Value &obj, const char *key, uint64_t defaultValue = 0);
     static unsigned getUint(const rapidjson::Value &obj, const char *key, unsigned defaultValue = 0);
 
@@ -66,6 +59,7 @@ private:
 class JsonReader : public IJsonReader
 {
 public:
+    JsonReader();
     inline JsonReader(const rapidjson::Value &obj) : m_obj(obj) {}
 
     inline bool getBool(const char *key, bool defaultValue = false) const override                   { return Json::getBool(m_obj, key, defaultValue); }
@@ -73,8 +67,11 @@ public:
     inline const rapidjson::Value &getArray(const char *key) const override                          { return Json::getArray(m_obj, key); }
     inline const rapidjson::Value &getObject(const char *key) const override                         { return Json::getObject(m_obj, key); }
     inline const rapidjson::Value &getValue(const char *key) const override                          { return Json::getValue(m_obj, key); }
+    inline const rapidjson::Value &object() const override                                           { return m_obj; }
+    inline double getDouble(const char *key, double defaultValue = 0) const override                 { return Json::getDouble(m_obj, key, defaultValue); }
     inline int getInt(const char *key, int defaultValue = 0) const override                          { return Json::getInt(m_obj, key, defaultValue); }
     inline int64_t getInt64(const char *key, int64_t defaultValue = 0) const override                { return Json::getInt64(m_obj, key, defaultValue); }
+    inline String getString(const char *key, size_t maxSize) const override                          { return Json::getString(m_obj, key, maxSize); }
     inline uint64_t getUint64(const char *key, uint64_t defaultValue = 0) const override             { return Json::getUint64(m_obj, key, defaultValue); }
     inline unsigned getUint(const char *key, unsigned defaultValue = 0) const override               { return Json::getUint(m_obj, key, defaultValue); }
 
diff --git a/src/base/io/json/JsonChain.cpp b/src/base/io/json/JsonChain.cpp
index dff619e8..0a4a1857 100644
--- a/src/base/io/json/JsonChain.cpp
+++ b/src/base/io/json/JsonChain.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -181,6 +175,28 @@ const rapidjson::Value &xmrig::JsonChain::getValue(const char *key) const
 }
 
 
+
+const rapidjson::Value &xmrig::JsonChain::object() const
+{
+    assert(false);
+
+    return m_chain.back();
+}
+
+
+double xmrig::JsonChain::getDouble(const char *key, double defaultValue) const
+{
+    for (auto it = m_chain.rbegin(); it != m_chain.rend(); ++it) {
+        auto i = it->FindMember(key);
+        if (i != it->MemberEnd() && (i->value.IsDouble() || i->value.IsLosslessDouble())) {
+            return i->value.GetDouble();
+        }
+    }
+
+    return defaultValue;
+}
+
+
 int xmrig::JsonChain::getInt(const char *key, int defaultValue) const
 {
     for (auto it = m_chain.rbegin(); it != m_chain.rend(); ++it) {
@@ -207,6 +223,24 @@ int64_t xmrig::JsonChain::getInt64(const char *key, int64_t defaultValue) const
 }
 
 
+
+xmrig::String xmrig::JsonChain::getString(const char *key, size_t maxSize) const
+{
+    for (auto it = m_chain.rbegin(); it != m_chain.rend(); ++it) {
+        auto i = it->FindMember(key);
+        if (i != it->MemberEnd() && i->value.IsString()) {
+            if (maxSize == 0 || i->value.GetStringLength() <= maxSize) {
+                return i->value.GetString();
+            }
+
+            return { i->value.GetString(), maxSize };
+        }
+    }
+
+    return {};
+}
+
+
 uint64_t xmrig::JsonChain::getUint64(const char *key, uint64_t defaultValue) const
 {
     for (auto it = m_chain.rbegin(); it != m_chain.rend(); ++it) {
diff --git a/src/base/io/json/JsonChain.h b/src/base/io/json/JsonChain.h
index 90f30742..d7fc2f05 100644
--- a/src/base/io/json/JsonChain.h
+++ b/src/base/io/json/JsonChain.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -59,8 +53,11 @@ protected:
     const rapidjson::Value &getArray(const char *key) const override;
     const rapidjson::Value &getObject(const char *key) const override;
     const rapidjson::Value &getValue(const char *key) const override;
+    const rapidjson::Value &object() const override;
+    double getDouble(const char *key, double defaultValue = 0) const override;
     int getInt(const char *key, int defaultValue = 0) const override;
     int64_t getInt64(const char *key, int64_t defaultValue = 0) const override;
+    String getString(const char *key, size_t maxSize) const override;
     uint64_t getUint64(const char *key, uint64_t defaultValue = 0) const override;
     unsigned getUint(const char *key, unsigned defaultValue = 0) const override;
 
diff --git a/src/base/io/json/JsonRequest.cpp b/src/base/io/json/JsonRequest.cpp
index cacbdc80..2bfdda00 100644
--- a/src/base/io/json/JsonRequest.cpp
+++ b/src/base/io/json/JsonRequest.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -30,16 +24,33 @@
 namespace xmrig {
 
 
-static const char *k2_0             = "2.0";
-static const char *kId              = "id";
-static const char *kJsonRPC         = "jsonrpc";
-static const char *kMethod          = "method";
-const char *JsonRequest::kParams    = "params";
+const char *JsonRequest::k2_0               = "2.0";
+const char *JsonRequest::kId                = "id";
+const char *JsonRequest::kJsonRPC           = "jsonrpc";
+const char *JsonRequest::kMethod            = "method";
+const char *JsonRequest::kOK                = "OK";
+const char *JsonRequest::kParams            = "params";
+const char *JsonRequest::kResult            = "result";
+const char *JsonRequest::kStatus            = "status";
+
+const char *JsonRequest::kParseError        = "parse error";
+const char *JsonRequest::kInvalidRequest    = "invalid request";
+const char *JsonRequest::kMethodNotFound    = "method not found";
+const char *JsonRequest::kInvalidParams     = "invalid params";
+const char *JsonRequest::kInternalError     = "internal error";
+
+static uint64_t nextId                      = 0;
 
 
 } // namespace xmrig
 
 
+rapidjson::Document xmrig::JsonRequest::create(const char *method)
+{
+    return create(++nextId, method);
+}
+
+
 rapidjson::Document xmrig::JsonRequest::create(int64_t id, const char *method)
 {
     using namespace rapidjson;
@@ -54,7 +65,13 @@ rapidjson::Document xmrig::JsonRequest::create(int64_t id, const char *method)
 }
 
 
-void xmrig::JsonRequest::create(rapidjson::Document &doc, int64_t id, const char *method, rapidjson::Value &params)
+uint64_t xmrig::JsonRequest::create(rapidjson::Document &doc, const char *method, rapidjson::Value &params)
+{
+    return create(doc, ++nextId, method, params);
+}
+
+
+uint64_t xmrig::JsonRequest::create(rapidjson::Document &doc, int64_t id, const char *method, rapidjson::Value &params)
 {
     using namespace rapidjson;
     auto &allocator = doc.GetAllocator();
@@ -63,4 +80,6 @@ void xmrig::JsonRequest::create(rapidjson::Document &doc, int64_t id, const char
     doc.AddMember(StringRef(kJsonRPC), StringRef(k2_0), allocator);
     doc.AddMember(StringRef(kMethod),  StringRef(method), allocator);
     doc.AddMember(StringRef(kParams),  params, allocator);
+
+    return id;
 }
diff --git a/src/base/io/json/JsonRequest.h b/src/base/io/json/JsonRequest.h
index 88dbbad6..21451a43 100644
--- a/src/base/io/json/JsonRequest.h
+++ b/src/base/io/json/JsonRequest.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -35,10 +29,31 @@ namespace xmrig {
 class JsonRequest
 {
 public:
+    static const char *k2_0;
+    static const char *kId;
+    static const char *kJsonRPC;
+    static const char *kMethod;
+    static const char *kOK;
     static const char *kParams;
+    static const char *kResult;
+    static const char *kStatus;
 
+    static const char *kParseError;
+    static const char *kInvalidRequest;
+    static const char *kMethodNotFound;
+    static const char *kInvalidParams;
+    static const char *kInternalError;
+
+    constexpr static int kParseErrorCode        = -32700;
+    constexpr static int kInvalidRequestCode    = -32600;
+    constexpr static int kMethodNotFoundCode    = -32601;
+    constexpr static int kInvalidParamsCode     = -32602;
+    constexpr static int kInternalErrorCode     = -32603;
+
+    static rapidjson::Document create(const char *method);
     static rapidjson::Document create(int64_t id, const char *method);
-    static void create(rapidjson::Document &doc, int64_t id, const char *method, rapidjson::Value &params);
+    static uint64_t create(rapidjson::Document &doc, const char *method, rapidjson::Value &params);
+    static uint64_t create(rapidjson::Document &doc, int64_t id, const char *method, rapidjson::Value &params);
 };
 
 
diff --git a/src/base/io/json/Json_unix.cpp b/src/base/io/json/Json_unix.cpp
index 328dda34..d2a2f351 100644
--- a/src/base/io/json/Json_unix.cpp
+++ b/src/base/io/json/Json_unix.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -43,7 +37,7 @@ bool xmrig::Json::get(const char *fileName, rapidjson::Document &doc)
     rapidjson::IStreamWrapper isw(ifs);
     doc.ParseStream<rapidjson::kParseCommentsFlag | rapidjson::kParseTrailingCommasFlag>(isw);
 
-    return !doc.HasParseError() && doc.IsObject();
+    return !doc.HasParseError() && (doc.IsObject() || doc.IsArray());
 }
 
 
@@ -56,7 +50,10 @@ bool xmrig::Json::save(const char *fileName, const rapidjson::Document &doc)
 
     rapidjson::OStreamWrapper osw(ofs);
     rapidjson::PrettyWriter<rapidjson::OStreamWrapper> writer(osw);
+
+#   ifdef XMRIG_JSON_SINGLE_LINE_ARRAY
     writer.SetFormatOptions(rapidjson::kFormatSingleLineArray);
+#   endif
 
     doc.Accept(writer);
 
diff --git a/src/base/io/json/Json_win.cpp b/src/base/io/json/Json_win.cpp
index 87c79c24..cd7cf584 100644
--- a/src/base/io/json/Json_win.cpp
+++ b/src/base/io/json/Json_win.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -96,7 +90,7 @@ bool xmrig::Json::get(const char *fileName, rapidjson::Document &doc)
     IStreamWrapper isw(ifs);
     doc.ParseStream<kParseCommentsFlag | kParseTrailingCommasFlag>(isw);
 
-    return !doc.HasParseError() && doc.IsObject();
+    return !doc.HasParseError() && (doc.IsObject() || doc.IsArray());
 }
 
 
@@ -127,7 +121,10 @@ bool xmrig::Json::save(const char *fileName, const rapidjson::Document &doc)
 
     OStreamWrapper osw(ofs);
     PrettyWriter<OStreamWrapper> writer(osw);
+
+#   ifdef XMRIG_JSON_SINGLE_LINE_ARRAY
     writer.SetFormatOptions(kFormatSingleLineArray);
+#   endif
 
     doc.Accept(writer);
 
diff --git a/src/base/io/log/Log.cpp b/src/base/io/log/Log.cpp
index 2c2b2d14..e144858a 100644
--- a/src/base/io/log/Log.cpp
+++ b/src/base/io/log/Log.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -31,6 +25,7 @@
 
 
 #include <algorithm>
+#include <cassert>
 #include <cstring>
 #include <ctime>
 #include <mutex>
@@ -76,7 +71,7 @@ public:
 
     inline ~LogPrivate()
     {
-        for (ILogBackend *backend : m_backends) {
+        for (auto backend : m_backends) {
             delete backend;
         }
     }
@@ -96,7 +91,7 @@ public:
             return;
         }
 
-        timestamp(level, size, offset);
+        const uint64_t ts = timestamp(level, size, offset);
         color(level, size);
 
         const int rc = vsnprintf(m_buf + size, sizeof (m_buf) - offset - 32, fmt, args);
@@ -114,9 +109,9 @@ public:
         }
 
         if (!m_backends.empty()) {
-            for (ILogBackend *backend : m_backends) {
-                backend->print(level, m_buf, offset, size, true);
-                backend->print(level, txt.c_str(), offset ? (offset - 11) : 0, txt.size(), false);
+            for (auto backend : m_backends) {
+                backend->print(ts, level, m_buf, offset, size, true);
+                backend->print(ts, level, txt.c_str(), offset ? (offset - 11) : 0, txt.size(), false);
             }
         }
         else {
@@ -127,14 +122,15 @@ public:
 
 
 private:
-    inline void timestamp(Log::Level level, size_t &size, size_t &offset)
+    inline uint64_t timestamp(Log::Level level, size_t &size, size_t &offset)
     {
+        const uint64_t ms = Chrono::currentMSecsSinceEpoch();
+
         if (level == Log::NONE) {
-            return;
+            return ms;
         }
 
-        const uint64_t ms = Chrono::currentMSecsSinceEpoch();
-        time_t now        = ms / 1000;
+        time_t now = ms / 1000;
         tm stime{};
 
 #       ifdef _WIN32
@@ -156,6 +152,8 @@ private:
         if (rc > 0) {
             size = offset = static_cast<size_t>(rc);
         }
+
+        return ms;
     }
 
 
@@ -195,10 +193,10 @@ private:
 };
 
 
-bool Log::m_background    = false;
-bool Log::m_colors        = true;
-LogPrivate *Log::d      = new LogPrivate();
-uint32_t Log::m_verbose   = 0;
+bool Log::m_background      = false;
+bool Log::m_colors          = true;
+LogPrivate *Log::d          = nullptr;
+uint32_t Log::m_verbose     = 0;
 
 
 } /* namespace xmrig */
@@ -207,6 +205,8 @@ uint32_t Log::m_verbose   = 0;
 
 void xmrig::Log::add(ILogBackend *backend)
 {
+    assert(d != nullptr);
+
     if (d) {
         d->add(backend);
     }
@@ -220,6 +220,12 @@ void xmrig::Log::destroy()
 }
 
 
+void xmrig::Log::init()
+{
+    d = new LogPrivate();
+}
+
+
 void xmrig::Log::print(const char *fmt, ...)
 {
     if (!d) {
diff --git a/src/base/io/log/Log.h b/src/base/io/log/Log.h
index 73d4e53f..6da2e892 100644
--- a/src/base/io/log/Log.h
+++ b/src/base/io/log/Log.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -57,6 +51,7 @@ public:
 
     static void add(ILogBackend *backend);
     static void destroy();
+    static void init();
     static void print(const char *fmt, ...);
     static void print(Level level, const char *fmt, ...);
 
@@ -71,9 +66,8 @@ public:
 private:
     static bool m_background;
     static bool m_colors;
-    static uint32_t m_verbose;
-
     static LogPrivate *d;
+    static uint32_t m_verbose;
 };
 
 
diff --git a/src/base/io/log/backends/ConsoleLog.cpp b/src/base/io/log/backends/ConsoleLog.cpp
index 29103a54..cc3081fd 100644
--- a/src/base/io/log/backends/ConsoleLog.cpp
+++ b/src/base/io/log/backends/ConsoleLog.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,14 +18,13 @@
  */
 
 
-#include <cstdio>
-
-
 #include "base/io/log/backends/ConsoleLog.h"
 #include "base/io/log/Log.h"
 #include "base/kernel/config/Title.h"
 #include "base/tools/Handle.h"
-#include "version.h"
+
+
+#include <cstdio>
 
 
 xmrig::ConsoleLog::ConsoleLog(const Title &title)
@@ -75,7 +68,7 @@ xmrig::ConsoleLog::~ConsoleLog()
 }
 
 
-void xmrig::ConsoleLog::print(int, const char *line, size_t, size_t size, bool colors)
+void xmrig::ConsoleLog::print(uint64_t, int, const char *line, size_t, size_t size, bool colors)
 {
     if (!m_tty || Log::isColors() != colors) {
         return;
diff --git a/src/base/io/log/backends/ConsoleLog.h b/src/base/io/log/backends/ConsoleLog.h
index 7f365a15..01917763 100644
--- a/src/base/io/log/backends/ConsoleLog.h
+++ b/src/base/io/log/backends/ConsoleLog.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -50,7 +44,7 @@ public:
     ~ConsoleLog() override;
 
 protected:
-    void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
+    void print(uint64_t timestamp, int level, const char *line, size_t offset, size_t size, bool colors) override;
 
 private:
     bool isSupported() const;
diff --git a/src/base/io/log/backends/FileLog.cpp b/src/base/io/log/backends/FileLog.cpp
index 2d52d812..51e5b1f7 100644
--- a/src/base/io/log/backends/FileLog.cpp
+++ b/src/base/io/log/backends/FileLog.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -37,7 +31,7 @@ xmrig::FileLog::FileLog(const char *fileName) :
 }
 
 
-void xmrig::FileLog::print(int, const char *line, size_t, size_t size, bool colors)
+void xmrig::FileLog::print(uint64_t, int, const char *line, size_t, size_t size, bool colors)
 {
     if (!m_writer.isOpen() || colors) {
         return;
diff --git a/src/base/io/log/backends/FileLog.h b/src/base/io/log/backends/FileLog.h
index 95e9881a..c52cefd9 100644
--- a/src/base/io/log/backends/FileLog.h
+++ b/src/base/io/log/backends/FileLog.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -40,7 +34,7 @@ public:
     FileLog(const char *fileName);
 
 protected:
-    void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
+    void print(uint64_t timestamp, int level, const char *line, size_t offset, size_t size, bool colors) override;
 
 private:
     FileLogWriter m_writer;
diff --git a/src/base/io/log/backends/SysLog.cpp b/src/base/io/log/backends/SysLog.cpp
index e66f2e35..bd333908 100644
--- a/src/base/io/log/backends/SysLog.cpp
+++ b/src/base/io/log/backends/SysLog.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -43,7 +37,7 @@ xmrig::SysLog::~SysLog()
 }
 
 
-void xmrig::SysLog::print(int level, const char *line, size_t offset, size_t, bool colors)
+void xmrig::SysLog::print(uint64_t, int level, const char *line, size_t offset, size_t, bool colors)
 {
     if (colors) {
         return;
diff --git a/src/base/io/log/backends/SysLog.h b/src/base/io/log/backends/SysLog.h
index d131784b..447ad006 100644
--- a/src/base/io/log/backends/SysLog.h
+++ b/src/base/io/log/backends/SysLog.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2019      Spudz76     <https://github.com/Spudz76>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -36,11 +30,13 @@ namespace xmrig {
 class SysLog : public ILogBackend
 {
 public:
+    XMRIG_DISABLE_COPY_MOVE(SysLog)
+
     SysLog();
     ~SysLog() override;
 
 protected:
-    void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
+    void print(uint64_t timestamp, int level, const char *line, size_t offset, size_t size, bool colors) override;
 };
 
 
diff --git a/src/base/kernel/Base.cpp b/src/base/kernel/Base.cpp
index 1e5019ca..24736193 100644
--- a/src/base/kernel/Base.cpp
+++ b/src/base/kernel/Base.cpp
@@ -166,6 +166,7 @@ private:
 xmrig::Base::Base(Process *process)
     : d_ptr(new BasePrivate(process))
 {
+    Log::init();
 }
 
 
diff --git a/src/base/kernel/config/Title.cpp b/src/base/kernel/config/Title.cpp
index 1e9c3ce4..030aa727 100644
--- a/src/base/kernel/config/Title.cpp
+++ b/src/base/kernel/config/Title.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/kernel/config/Title.h b/src/base/kernel/config/Title.h
index 8cf73f28..452869dc 100644
--- a/src/base/kernel/config/Title.h
+++ b/src/base/kernel/config/Title.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/kernel/constants.h b/src/base/kernel/constants.h
new file mode 100644
index 00000000..a76cee9a
--- /dev/null
+++ b/src/base/kernel/constants.h
@@ -0,0 +1,31 @@
+/* XMRig
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef XMRIG_CONSTANTS_H
+#define XMRIG_CONSTANTS_H
+
+
+#include <cstddef>
+#include <cstdint>
+
+
+constexpr size_t      XMRIG_NET_BUFFER_CHUNK_SIZE           = 64 * 1024;
+constexpr size_t      XMRIG_NET_BUFFER_INIT_CHUNKS          = 4;
+
+
+#endif /* XMRIG_CONSTANTS_H */
diff --git a/src/base/kernel/interfaces/IJsonReader.h b/src/base/kernel/interfaces/IJsonReader.h
index b545514d..044a291c 100644
--- a/src/base/kernel/interfaces/IJsonReader.h
+++ b/src/base/kernel/interfaces/IJsonReader.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -27,6 +21,8 @@
 
 
 #include "3rdparty/rapidjson/fwd.h"
+#include "base/tools/Object.h"
+#include "base/tools/String.h"
 
 
 namespace xmrig {
@@ -35,7 +31,10 @@ namespace xmrig {
 class IJsonReader
 {
 public:
-    virtual ~IJsonReader() = default;
+    XMRIG_DISABLE_COPY_MOVE(IJsonReader)
+
+    IJsonReader()           = default;
+    virtual ~IJsonReader()  = default;
 
     virtual bool getBool(const char *key, bool defaultValue = false) const                       = 0;
     virtual bool isEmpty() const                                                                 = 0;
@@ -43,8 +42,11 @@ public:
     virtual const rapidjson::Value &getArray(const char *key) const                              = 0;
     virtual const rapidjson::Value &getObject(const char *key) const                             = 0;
     virtual const rapidjson::Value &getValue(const char *key) const                              = 0;
+    virtual const rapidjson::Value &object() const                                               = 0;
+    virtual double getDouble(const char *key, double defaultValue = 0) const                     = 0;
     virtual int getInt(const char *key, int defaultValue = 0) const                              = 0;
     virtual int64_t getInt64(const char *key, int64_t defaultValue = 0) const                    = 0;
+    virtual String getString(const char *key, size_t maxSize) const                              = 0;
     virtual uint64_t getUint64(const char *key, uint64_t defaultValue = 0) const                 = 0;
     virtual unsigned getUint(const char *key, unsigned defaultValue = 0) const                   = 0;
 };
diff --git a/src/base/kernel/interfaces/ILogBackend.h b/src/base/kernel/interfaces/ILogBackend.h
index ef18da88..88137fd1 100644
--- a/src/base/kernel/interfaces/ILogBackend.h
+++ b/src/base/kernel/interfaces/ILogBackend.h
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2019      Spudz76     <https://github.com/Spudz76>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -27,8 +20,11 @@
 #define XMRIG_ILOGBACKEND_H
 
 
-#include <stdarg.h>
-#include <stddef.h>
+#include "base/tools/Object.h"
+
+
+#include <cstdarg>
+#include <cstddef>
 
 
 namespace xmrig {
@@ -37,9 +33,12 @@ namespace xmrig {
 class ILogBackend
 {
 public:
-    virtual ~ILogBackend() = default;
+    XMRIG_DISABLE_COPY_MOVE(ILogBackend)
 
-    virtual void print(int level, const char *line, size_t offset, size_t size, bool colors) = 0;
+    ILogBackend()           = default;
+    virtual ~ILogBackend()  = default;
+
+    virtual void print(uint64_t timestamp, int level, const char *line, size_t offset, size_t size, bool colors) = 0;
 };
 
 
diff --git a/src/base/net/dns/Dns.cpp b/src/base/net/dns/Dns.cpp
index 6246421c..ef50b20d 100644
--- a/src/base/net/dns/Dns.cpp
+++ b/src/base/net/dns/Dns.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/net/dns/Dns.h b/src/base/net/dns/Dns.h
index 068ab80f..86f90145 100644
--- a/src/base/net/dns/Dns.h
+++ b/src/base/net/dns/Dns.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/net/dns/DnsRecord.cpp b/src/base/net/dns/DnsRecord.cpp
index e722ad6a..1667c715 100644
--- a/src/base/net/dns/DnsRecord.cpp
+++ b/src/base/net/dns/DnsRecord.cpp
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/net/dns/DnsRecord.h b/src/base/net/dns/DnsRecord.h
index 0b572df8..cf6c2598 100644
--- a/src/base/net/dns/DnsRecord.h
+++ b/src/base/net/dns/DnsRecord.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/net/http/Fetch.cpp b/src/base/net/http/Fetch.cpp
index 4d18b71d..84ff715c 100644
--- a/src/base/net/http/Fetch.cpp
+++ b/src/base/net/http/Fetch.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -95,7 +95,7 @@ void xmrig::FetchRequest::setBody(const rapidjson::Value &value)
 }
 
 
-void xmrig::fetch(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener, int type)
+void xmrig::fetch(const char *tag, FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener, int type, uint64_t rpcId)
 {
 #   ifdef APP_DEBUG
     LOG_DEBUG(CYAN("http%s://%s:%u ") MAGENTA_BOLD("\"%s %s\"") BLACK_BOLD(" body: ") CYAN_BOLD("%zu") BLACK_BOLD(" bytes"),
@@ -109,14 +109,15 @@ void xmrig::fetch(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listen
     HttpClient *client;
 #   ifdef XMRIG_FEATURE_TLS
     if (req.tls) {
-        client = new HttpsClient(std::move(req), listener);
+        client = new HttpsClient(tag, std::move(req), listener);
     }
     else
 #   endif
     {
-        client = new HttpClient(std::move(req), listener);
+        client = new HttpClient(tag, std::move(req), listener);
     }
 
     client->userType = type;
+    client->rpcId    = rpcId;
     client->connect();
 }
diff --git a/src/base/net/http/Fetch.h b/src/base/net/http/Fetch.h
index b6fbf487..bdab46ba 100644
--- a/src/base/net/http/Fetch.h
+++ b/src/base/net/http/Fetch.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -58,10 +58,11 @@ public:
     String host;
     String path;
     uint16_t port       = 0;
+    uint64_t timeout    = 0;
 };
 
 
-void fetch(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener, int type = 0);
+void fetch(const char *tag, FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener, int type = 0, uint64_t rpcId = 0);
 
 
 } // namespace xmrig
diff --git a/src/base/net/http/HttpClient.cpp b/src/base/net/http/HttpClient.cpp
index 92ca6fac..320f8ee4 100644
--- a/src/base/net/http/HttpClient.cpp
+++ b/src/base/net/http/HttpClient.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -30,6 +24,7 @@
 #include "base/kernel/Platform.h"
 #include "base/net/dns/Dns.h"
 #include "base/net/tools/NetBuffer.h"
+#include "base/tools/Timer.h"
 
 
 #include <sstream>
@@ -44,21 +39,20 @@ static const char *kCRLF = "\r\n";
 } // namespace xmrig
 
 
-xmrig::HttpClient::HttpClient(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener) :
+xmrig::HttpClient::HttpClient(const char *tag, FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener) :
     HttpContext(HTTP_RESPONSE, listener),
+    m_tag(tag),
     m_req(std::move(req))
 {
     method  = m_req.method;
     url     = std::move(m_req.path);
     body    = std::move(m_req.body);
     headers = std::move(m_req.headers);
-    m_dns   = new Dns(this);
-}
+    m_dns   = std::make_shared<Dns>(this);
 
-
-xmrig::HttpClient::~HttpClient()
-{
-    delete m_dns;
+    if (m_req.timeout) {
+        m_timer = std::make_shared<Timer>(this, m_req.timeout, 0);
+    }
 }
 
 
@@ -74,7 +68,7 @@ void xmrig::HttpClient::onResolved(const Dns &dns, int status)
 
     if (status < 0 && dns.isEmpty()) {
         if (!isQuiet()) {
-            LOG_ERR("[%s:%d] DNS error: \"%s\"", dns.host().data(), port(), uv_strerror(status));
+            LOG_ERR("%s " RED("DNS error: ") RED_BOLD("\"%s\""), tag(), uv_strerror(status));
         }
 
         return;
@@ -91,6 +85,12 @@ void xmrig::HttpClient::onResolved(const Dns &dns, int status)
 }
 
 
+void xmrig::HttpClient::onTimer(const Timer *)
+{
+    close(UV_ETIMEDOUT);
+}
+
+
 void xmrig::HttpClient::handshake()
 {
     headers.insert({ "Host",       host() });
@@ -135,8 +135,12 @@ void xmrig::HttpClient::onConnect(uv_connect_t *req, int status)
     }
 
     if (status < 0) {
+        if (status == UV_ECANCELED) {
+            status = UV_ETIMEDOUT;
+        }
+
         if (!client->isQuiet()) {
-            LOG_ERR("[%s:%d] connect error: \"%s\"", client->m_dns->host().data(), client->port(), uv_strerror(status));
+            LOG_ERR("%s " RED("connect error: ") RED_BOLD("\"%s\""), client->tag(), uv_strerror(status));
         }
 
         return client->close(status);
@@ -151,7 +155,7 @@ void xmrig::HttpClient::onConnect(uv_connect_t *req, int status)
                 client->read(buf->base, static_cast<size_t>(nread));
             } else {
                 if (!client->isQuiet() && nread != UV_EOF) {
-                    LOG_ERR("[%s:%d] read error: \"%s\"", client->m_dns->host().data(), client->port(), uv_strerror(static_cast<int>(nread)));
+                    LOG_ERR("%s " RED("read error: ") RED_BOLD("\"%s\""), client->tag(), uv_strerror(static_cast<int>(nread)));
                 }
 
                 client->close(static_cast<int>(nread));
diff --git a/src/base/net/http/HttpClient.h b/src/base/net/http/HttpClient.h
index acfe15e2..2b9a314d 100644
--- a/src/base/net/http/HttpClient.h
+++ b/src/base/net/http/HttpClient.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,6 +23,7 @@
 
 
 #include "base/kernel/interfaces/IDnsListener.h"
+#include "base/kernel/interfaces/ITimerListener.h"
 #include "base/net/http/Fetch.h"
 #include "base/net/http/HttpContext.h"
 #include "base/tools/Object.h"
@@ -40,22 +35,24 @@ namespace xmrig {
 class String;
 
 
-class HttpClient : public HttpContext, public IDnsListener
+class HttpClient : public HttpContext, public IDnsListener, public ITimerListener
 {
 public:
     XMRIG_DISABLE_COPY_MOVE_DEFAULT(HttpClient);
 
-    HttpClient(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener);
-    ~HttpClient() override;
+    HttpClient(const char *tag, FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener);
+    ~HttpClient() override = default;
 
     inline bool isQuiet() const                 { return m_req.quiet; }
     inline const char *host() const override    { return m_req.host; }
+    inline const char *tag() const              { return m_tag; }
     inline uint16_t port() const override       { return m_req.port; }
 
     bool connect();
 
 protected:
     void onResolved(const Dns &dns, int status) override;
+    void onTimer(const Timer *timer) override;
 
     virtual void handshake();
     virtual void read(const char *data, size_t size);
@@ -66,8 +63,10 @@ protected:
 private:
     static void onConnect(uv_connect_t *req, int status);
 
-    Dns *m_dns;
+    const char *m_tag;
     FetchRequest m_req;
+    std::shared_ptr<Dns> m_dns;
+    std::shared_ptr<Timer> m_timer;
 };
 
 
diff --git a/src/base/net/http/HttpContext.cpp b/src/base/net/http/HttpContext.cpp
index b348d7e4..52739e4d 100644
--- a/src/base/net/http/HttpContext.cpp
+++ b/src/base/net/http/HttpContext.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -160,6 +154,10 @@ uint64_t xmrig::HttpContext::elapsed() const
 
 void xmrig::HttpContext::close(int status)
 {
+    if (!get(id())) {
+        return;
+    }
+
     auto listener = httpListener();
 
     if (status < 0 && listener) {
@@ -262,7 +260,7 @@ void xmrig::HttpContext::attach(http_parser_settings *settings)
 
     settings->on_body = [](http_parser *parser, const char *at, size_t len) -> int
     {
-        static_cast<HttpContext*>(parser->data)->body += std::string(at, len);
+        static_cast<HttpContext*>(parser->data)->body.append(at, len);
 
         return 0;
     };
diff --git a/src/base/net/http/HttpContext.h b/src/base/net/http/HttpContext.h
index a7554679..4202bfaf 100644
--- a/src/base/net/http/HttpContext.h
+++ b/src/base/net/http/HttpContext.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/net/http/HttpListener.cpp b/src/base/net/http/HttpListener.cpp
index 077184fc..ba9130ed 100644
--- a/src/base/net/http/HttpListener.cpp
+++ b/src/base/net/http/HttpListener.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/base/net/http/HttpListener.h b/src/base/net/http/HttpListener.h
index 4f982c4d..0e726421 100644
--- a/src/base/net/http/HttpListener.h
+++ b/src/base/net/http/HttpListener.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,20 +29,13 @@ namespace xmrig {
 class HttpListener : public IHttpListener
 {
 public:
-    inline HttpListener(IHttpListener *listener, const char *tag = nullptr) :
-#       ifdef APP_DEBUG
-        m_tag(tag),
-#       endif
-        m_listener(listener)
-    {}
+    inline HttpListener(IHttpListener *listener, const char *tag = nullptr) : m_tag(tag), m_listener(listener) {}
 
 protected:
     void onHttpData(const HttpData &data) override;
 
 private:
-#   ifdef APP_DEBUG
     const char *m_tag;
-#   endif
     IHttpListener *m_listener;
 };
 
diff --git a/src/base/net/https/HttpsClient.cpp b/src/base/net/https/HttpsClient.cpp
index 28b5a5ef..8b414917 100644
--- a/src/base/net/https/HttpsClient.cpp
+++ b/src/base/net/https/HttpsClient.cpp
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -31,7 +25,7 @@
 
 #include "base/net/https/HttpsClient.h"
 #include "base/io/log/Log.h"
-#include "base/tools/Buffer.h"
+#include "base/tools/Cvt.h"
 
 
 #ifdef _MSC_VER
@@ -39,8 +33,8 @@
 #endif
 
 
-xmrig::HttpsClient::HttpsClient(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener) :
-    HttpClient(std::move(req), listener)
+xmrig::HttpsClient::HttpsClient(const char *tag, FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener) :
+    HttpClient(tag, std::move(req), listener)
 {
     m_ctx = SSL_CTX_new(SSLv23_method());
     assert(m_ctx != nullptr);
@@ -182,7 +176,7 @@ bool xmrig::HttpsClient::verifyFingerprint(X509 *cert)
         return false;
     }
 
-    Buffer::toHex(md, 32, m_fingerprint);
+    Cvt::toHex(m_fingerprint, sizeof(m_fingerprint), md, 32);
 
     return req().fingerprint.isNull() || strncasecmp(m_fingerprint, req().fingerprint.data(), 64) == 0;
 }
diff --git a/src/base/net/https/HttpsClient.h b/src/base/net/https/HttpsClient.h
index eeeec747..bd0c65ff 100644
--- a/src/base/net/https/HttpsClient.h
+++ b/src/base/net/https/HttpsClient.h
@@ -1,13 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2014-2019 heapwolf    <https://github.com/heapwolf>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2014-2019 heapwolf    <https://github.com/heapwolf>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -46,7 +40,7 @@ class HttpsClient : public HttpClient
 public:
     XMRIG_DISABLE_COPY_MOVE_DEFAULT(HttpsClient)
 
-    HttpsClient(FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener);
+    HttpsClient(const char *tag, FetchRequest &&req, const std::weak_ptr<IHttpListener> &listener);
     ~HttpsClient() override;
 
     const char *tlsFingerprint() const override;
diff --git a/src/base/net/stratum/Client.cpp b/src/base/net/stratum/Client.cpp
index 018f7a66..5327867e 100644
--- a/src/base/net/stratum/Client.cpp
+++ b/src/base/net/stratum/Client.cpp
@@ -50,7 +50,7 @@
 #include "base/net/dns/Dns.h"
 #include "base/net/stratum/Socks5.h"
 #include "base/net/tools/NetBuffer.h"
-#include "base/tools/Buffer.h"
+#include "base/tools/Cvt.h"
 #include "base/tools/Chrono.h"
 #include "net/JobResult.h"
 
@@ -202,11 +202,8 @@ int64_t xmrig::Client::submit(const JobResult &result)
     char *nonce = m_sendBuf.data();
     char *data  = m_sendBuf.data() + 16;
 
-    Buffer::toHex(reinterpret_cast<const char*>(&result.nonce), 4, nonce);
-    nonce[8] = '\0';
-
-    Buffer::toHex(result.result(), 32, data);
-    data[64] = '\0';
+    Cvt::toHex(nonce, sizeof(uint32_t) * 2 + 1, reinterpret_cast<const uint8_t *>(&result.nonce), sizeof(uint32_t));
+    Cvt::toHex(data, 65, result.result(), 32);
 #   endif
 
     Document doc(kObjectType);
diff --git a/src/base/net/stratum/DaemonClient.cpp b/src/base/net/stratum/DaemonClient.cpp
index a8986747..8b4d0fb6 100644
--- a/src/base/net/stratum/DaemonClient.cpp
+++ b/src/base/net/stratum/DaemonClient.cpp
@@ -36,7 +36,7 @@
 #include "base/net/http/HttpData.h"
 #include "base/net/http/HttpListener.h"
 #include "base/net/stratum/SubmitResult.h"
-#include "base/tools/Buffer.h"
+#include "base/tools/Cvt.h"
 #include "base/tools/Timer.h"
 #include "net/JobResult.h"
 
@@ -54,7 +54,7 @@ static const char *kHash                    = "hash";
 static const char *kHeight                  = "height";
 static const char *kJsonRPC                 = "/json_rpc";
 
-static const size_t BlobReserveSize         = 8;
+static constexpr size_t kBlobReserveSize    = 8;
 
 }
 
@@ -104,7 +104,7 @@ int64_t xmrig::DaemonClient::submit(const JobResult &result)
 #   ifdef XMRIG_PROXY_PROJECT
     memcpy(data + 78, result.nonce, 8);
 #   else
-    Buffer::toHex(reinterpret_cast<const uint8_t *>(&result.nonce), 4, data + 78);
+    Cvt::toHex(data + 78, 9, reinterpret_cast<const uint8_t *>(&result.nonce), 4);
 #   endif
 
     using namespace rapidjson;
@@ -227,7 +227,7 @@ bool xmrig::DaemonClient::parseJob(const rapidjson::Value &params, int *code)
     m_blockhashingblob = Json::getString(params, "blockhashing_blob");
     if (m_apiVersion == API_DERO) {
         const uint64_t offset = Json::getUint64(params, "reserved_offset");
-        Buffer::toHex(Buffer::randomBytes(BlobReserveSize).data(), BlobReserveSize, m_blockhashingblob.data() + offset * 2);
+        Cvt::toHex(m_blockhashingblob.data() + offset * 2, kBlobReserveSize * 2 + 1, Cvt::randomBytes(kBlobReserveSize).data(), kBlobReserveSize);
     }
 
     if (blocktemplate.isNull() || !job.setBlob(m_blockhashingblob)) {
@@ -315,10 +315,10 @@ int64_t xmrig::DaemonClient::getBlockTemplate()
     Value params(kObjectType);
     params.AddMember("wallet_address", m_user.toJSON(), allocator);
     if (m_apiVersion == API_DERO) {
-        params.AddMember("reserve_size", static_cast<uint64_t>(BlobReserveSize), allocator);
+        params.AddMember("reserve_size", static_cast<uint64_t>(kBlobReserveSize), allocator);
     }
     else {
-        params.AddMember("extra_nonce", Buffer::randomBytes(BlobReserveSize).toHex().toJSON(doc), allocator);
+        params.AddMember("extra_nonce", Cvt::toHex(Cvt::randomBytes(kBlobReserveSize)).toJSON(doc), allocator);
     }
 
     JsonRequest::create(doc, m_sequence, "getblocktemplate", params);
@@ -330,7 +330,7 @@ int64_t xmrig::DaemonClient::getBlockTemplate()
 int64_t xmrig::DaemonClient::rpcSend(const rapidjson::Document &doc)
 {
     FetchRequest req(HTTP_POST, m_pool.host(), m_pool.port(), kJsonRPC, doc, m_pool.isTLS(), isQuiet());
-    fetch(std::move(req), m_httpListener);
+    fetch(tag(), std::move(req), m_httpListener);
 
     return m_sequence++;
 }
@@ -357,7 +357,7 @@ void xmrig::DaemonClient::retry()
 void xmrig::DaemonClient::send(const char *path)
 {
     FetchRequest req(HTTP_GET, m_pool.host(), m_pool.port(), path, m_pool.isTLS(), isQuiet());
-    fetch(std::move(req), m_httpListener);
+    fetch(tag(), std::move(req), m_httpListener);
 }
 
 
diff --git a/src/base/net/stratum/Job.cpp b/src/base/net/stratum/Job.cpp
index 20345414..9075e4b2 100644
--- a/src/base/net/stratum/Job.cpp
+++ b/src/base/net/stratum/Job.cpp
@@ -31,6 +31,7 @@
 
 #include "base/net/stratum/Job.h"
 #include "base/tools/Buffer.h"
+#include "base/tools/Cvt.h"
 
 
 xmrig::Job::Job(bool nicehash, const Algorithm &algorithm, const String &clientId) :
@@ -63,7 +64,7 @@ bool xmrig::Job::setBlob(const char *blob)
         return false;
     }
 
-    if (!Buffer::fromHex(blob, m_size * 2, m_blob)) {
+    if (!Cvt::fromHex(m_blob, sizeof(m_blob), blob, m_size * 2)) {
         return false;
     }
 
@@ -90,9 +91,9 @@ bool xmrig::Job::setSeedHash(const char *hash)
     m_rawSeedHash = hash;
 #   endif
 
-    m_seed = Buffer::fromHex(hash, kMaxSeedSize * 2);
+    m_seed = Cvt::fromHex(hash, kMaxSeedSize * 2);
 
-    return !m_seed.isEmpty();
+    return !m_seed.empty();
 }
 
 
@@ -102,27 +103,14 @@ bool xmrig::Job::setTarget(const char *target)
         return false;
     }
 
-    const size_t len = strlen(target);
+    const auto raw    = Cvt::fromHex(target, strlen(target));
+    const size_t size = raw.size();
 
-    if (len <= 8) {
-        uint32_t tmp = 0;
-        char str[8];
-        memcpy(str, target, len);
-
-        if (!Buffer::fromHex(str, 8, reinterpret_cast<uint8_t *>(&tmp)) || tmp == 0) {
-            return false;
-        }
-
-        m_target = 0xFFFFFFFFFFFFFFFFULL / (0xFFFFFFFFULL / static_cast<uint64_t>(tmp));
+    if (size == 4) {
+        m_target = 0xFFFFFFFFFFFFFFFFULL / (0xFFFFFFFFULL / uint64_t(*reinterpret_cast<const uint32_t *>(raw.data())));
     }
-    else if (len <= 16) {
-        m_target = 0;
-        char str[16];
-        memcpy(str, target, len);
-
-        if (!Buffer::fromHex(str, 16, reinterpret_cast<uint8_t *>(&m_target)) || m_target == 0) {
-            return false;
-        }
+    else if (size == 8) {
+        m_target = *reinterpret_cast<const uint64_t *>(raw.data());
     }
     else {
         return false;
diff --git a/src/base/net/stratum/SelfSelectClient.cpp b/src/base/net/stratum/SelfSelectClient.cpp
index 8ad48b65..fc4cea6e 100644
--- a/src/base/net/stratum/SelfSelectClient.cpp
+++ b/src/base/net/stratum/SelfSelectClient.cpp
@@ -154,7 +154,7 @@ void xmrig::SelfSelectClient::getBlockTemplate()
     JsonRequest::create(doc, m_sequence++, "getblocktemplate", params);
 
     FetchRequest req(HTTP_POST, pool().daemon().host(), pool().daemon().port(), "/json_rpc", doc, pool().daemon().isTLS(), isQuiet());
-    fetch(std::move(req), m_httpListener);
+    fetch(tag(), std::move(req), m_httpListener);
 }
 
 
diff --git a/src/base/net/stratum/Tls.cpp b/src/base/net/stratum/Tls.cpp
index 5915fad9..a4ccd853 100644
--- a/src/base/net/stratum/Tls.cpp
+++ b/src/base/net/stratum/Tls.cpp
@@ -27,7 +27,7 @@
 #include "base/net/stratum/Tls.h"
 #include "base/io/log/Log.h"
 #include "base/net/stratum/Client.h"
-#include "base/tools/Buffer.h"
+#include "base/tools/Cvt.h"
 
 
 #ifdef _MSC_VER
@@ -183,7 +183,7 @@ bool xmrig::Client::Tls::verifyFingerprint(X509 *cert)
         return false;
     }
 
-    Buffer::toHex(md, 32, m_fingerprint);
+    Cvt::toHex(m_fingerprint, sizeof(m_fingerprint), md, 32);
     const char *fingerprint = m_client->m_pool.fingerprint();
 
     return fingerprint == nullptr || strncasecmp(m_fingerprint, fingerprint, 64) == 0;
diff --git a/src/base/net/stratum/benchmark/BenchClient.cpp b/src/base/net/stratum/benchmark/BenchClient.cpp
index 003eeca7..beac2f19 100644
--- a/src/base/net/stratum/benchmark/BenchClient.cpp
+++ b/src/base/net/stratum/benchmark/BenchClient.cpp
@@ -31,6 +31,7 @@
 #include "base/net/http/HttpData.h"
 #include "base/net/http/HttpListener.h"
 #include "base/net/stratum/benchmark/BenchConfig.h"
+#include "base/tools/Cvt.h"
 #include "version.h"
 
 
@@ -217,7 +218,7 @@ bool xmrig::BenchClient::setSeed(const char *seed)
         return false;
     }
 
-    if (!Buffer::fromHex(seed, size * 2, m_job.blob())) {
+    if (!Cvt::fromHex(m_job.blob(), m_job.size(), seed, size * 2)) {
         return false;
     }
 
@@ -321,7 +322,7 @@ void xmrig::BenchClient::send(Request request)
     case GET_BENCH:
         {
             FetchRequest req(HTTP_GET, m_ip, BenchConfig::kApiPort, fmt::format("/1/benchmark/{}", m_job.id()).c_str(), BenchConfig::kApiTLS, true);
-            fetch(std::move(req), m_httpListener);
+            fetch(tag(), std::move(req), m_httpListener);
         }
         break;
 
@@ -335,7 +336,7 @@ void xmrig::BenchClient::send(Request request)
             doc.AddMember("cpu",                            Cpu::toJSON(doc), allocator);
 
             FetchRequest req(HTTP_POST, m_ip, BenchConfig::kApiPort, "/1/benchmark", doc, BenchConfig::kApiTLS, true);
-            fetch(std::move(req), m_httpListener);
+            fetch(tag(), std::move(req), m_httpListener);
         }
         break;
 
@@ -374,6 +375,6 @@ void xmrig::BenchClient::update(const rapidjson::Value &body)
     FetchRequest req(HTTP_PATCH, m_ip, BenchConfig::kApiPort, fmt::format("/1/benchmark/{}", m_job.id()).c_str(), body, BenchConfig::kApiTLS, true);
     req.headers.insert({ "Authorization", fmt::format("Bearer {}", m_token)});
 
-    fetch(std::move(req), m_httpListener);
+    fetch(tag(), std::move(req), m_httpListener);
 }
 #endif
diff --git a/src/base/net/tls/ServerTls.cpp b/src/base/net/tls/ServerTls.cpp
index e76d5862..abae315d 100644
--- a/src/base/net/tls/ServerTls.cpp
+++ b/src/base/net/tls/ServerTls.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -20,6 +20,7 @@
 #include "base/net/tls/ServerTls.h"
 
 
+#include <algorithm>
 #include <cassert>
 #include <cstring>
 #include <openssl/ssl.h>
@@ -39,11 +40,23 @@ xmrig::ServerTls::~ServerTls()
 }
 
 
+bool xmrig::ServerTls::isHTTP(const char *data, size_t size)
+{
+    assert(size > 0);
+
+    static const char test[6] = "GET /";
+
+    return size > 0 && memcmp(data, test, std::min(size, sizeof(test) - 1)) == 0;
+}
+
+
 bool xmrig::ServerTls::isTLS(const char *data, size_t size)
 {
+    assert(size > 0);
+
     static const uint8_t test[3] = { 0x16, 0x03, 0x01 };
 
-    return size >= sizeof(test) && memcmp(data, test, sizeof(test)) == 0;
+    return size > 0 && memcmp(data, test, std::min(size, sizeof(test))) == 0;
 }
 
 
diff --git a/src/base/net/tls/ServerTls.h b/src/base/net/tls/ServerTls.h
index 892bed2b..20337eb6 100644
--- a/src/base/net/tls/ServerTls.h
+++ b/src/base/net/tls/ServerTls.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -41,6 +41,7 @@ public:
     ServerTls(SSL_CTX *ctx);
     virtual ~ServerTls();
 
+    static bool isHTTP(const char *data, size_t size);
     static bool isTLS(const char *data, size_t size);
 
     bool send(const char *data, size_t size);
diff --git a/src/base/net/tools/LineReader.cpp b/src/base/net/tools/LineReader.cpp
index 3ad5c373..aa2897fc 100644
--- a/src/base/net/tools/LineReader.cpp
+++ b/src/base/net/tools/LineReader.cpp
@@ -19,8 +19,9 @@
 
 
 #include "base/net/tools/LineReader.h"
-#include "base/net/tools/NetBuffer.h"
+#include "base/kernel/constants.h"
 #include "base/kernel/interfaces/ILineListener.h"
+#include "base/net/tools/NetBuffer.h"
 
 #include <cassert>
 #include <cstring>
@@ -55,7 +56,7 @@ void xmrig::LineReader::reset()
 
 void xmrig::LineReader::add(const char *data, size_t size)
 {
-    if (size > NetBuffer::kChunkSize - m_pos) {
+    if (size > XMRIG_NET_BUFFER_CHUNK_SIZE - m_pos) {
         // it breakes correctness silently for long lines
         return;
     }
diff --git a/src/base/net/tools/MemPool.h b/src/base/net/tools/MemPool.h
index 3b8a8ef4..e7cf3a19 100644
--- a/src/base/net/tools/MemPool.h
+++ b/src/base/net/tools/MemPool.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -20,10 +20,10 @@
 #define XMRIG_MEMPOOL_H
 
 
-#include <map>
-#include <set>
 #include <array>
 #include <cassert>
+#include <map>
+#include <set>
 
 
 namespace xmrig {
diff --git a/src/base/net/tools/NetBuffer.cpp b/src/base/net/tools/NetBuffer.cpp
index 3303d971..8931f06e 100644
--- a/src/base/net/tools/NetBuffer.cpp
+++ b/src/base/net/tools/NetBuffer.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,8 +17,9 @@
  */
 
 
-#include "base/net/tools/MemPool.h"
 #include "base/net/tools/NetBuffer.h"
+#include "base/kernel/constants.h"
+#include "base/net/tools/MemPool.h"
 
 
 #include <cassert>
@@ -28,14 +29,13 @@
 namespace xmrig {
 
 
-static constexpr size_t kInitSize                       = 4;
-static MemPool<NetBuffer::kChunkSize, kInitSize> *pool  = nullptr;
+static MemPool<XMRIG_NET_BUFFER_CHUNK_SIZE, XMRIG_NET_BUFFER_INIT_CHUNKS> *pool = nullptr;
 
 
-inline MemPool<NetBuffer::kChunkSize, kInitSize> *getPool()
+inline MemPool<XMRIG_NET_BUFFER_CHUNK_SIZE, XMRIG_NET_BUFFER_INIT_CHUNKS> *getPool()
 {
     if (!pool) {
-        pool = new MemPool<NetBuffer::kChunkSize, kInitSize>();
+        pool = new MemPool<XMRIG_NET_BUFFER_CHUNK_SIZE, XMRIG_NET_BUFFER_INIT_CHUNKS>();
     }
 
     return pool;
@@ -67,17 +67,25 @@ void xmrig::NetBuffer::destroy()
 void xmrig::NetBuffer::onAlloc(uv_handle_t *, size_t, uv_buf_t *buf)
 {
     buf->base = getPool()->allocate();
-    buf->len  = kChunkSize;
+    buf->len  = XMRIG_NET_BUFFER_CHUNK_SIZE;
 }
 
 
 void xmrig::NetBuffer::release(const char *buf)
 {
+    if (buf == nullptr) {
+        return;
+    }
+
     getPool()->deallocate(buf);
 }
 
 
 void xmrig::NetBuffer::release(const uv_buf_t *buf)
 {
+    if (buf->base == nullptr) {
+        return;
+    }
+
     getPool()->deallocate(buf->base);
 }
diff --git a/src/base/net/tools/NetBuffer.h b/src/base/net/tools/NetBuffer.h
index 14255bb0..a7a2ee05 100644
--- a/src/base/net/tools/NetBuffer.h
+++ b/src/base/net/tools/NetBuffer.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -33,8 +33,6 @@ namespace xmrig {
 class NetBuffer
 {
 public:
-    static constexpr size_t kChunkSize = 16 * 1024;
-
     static char *allocate();
     static void destroy();
     static void onAlloc(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf);
diff --git a/src/base/tools/Buffer.cpp b/src/base/tools/Buffer.cpp
deleted file mode 100644
index e260b7a5..00000000
--- a/src/base/tools/Buffer.cpp
+++ /dev/null
@@ -1,231 +0,0 @@
-/* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
- *
- *   This program is free software: you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation, either version 3 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *   GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-#include "base/tools/Buffer.h"
-
-
-#include <random>
-
-
-namespace xmrig {
-
-
-static std::random_device randomDevice;
-static std::mt19937 randomEngine(randomDevice());
-
-
-} // namespace xmrig
-
-
-static inline uint8_t hf_hex2bin(uint8_t c, bool &err)
-{
-    if (c >= '0' && c <= '9') {
-        return c - '0';
-    }
-
-    if (c >= 'a' && c <= 'f') {
-        return c - 'a' + 0xA;
-    }
-
-    if (c >= 'A' && c <= 'F') {
-        return c - 'A' + 0xA;
-    }
-
-    err = true;
-    return 0;
-}
-
-
-static inline uint8_t hf_bin2hex(uint8_t c)
-{
-    if (c <= 0x9) {
-        return '0' + c;
-    }
-
-    return 'a' - 0xA + c;
-}
-
-
-xmrig::Buffer::Buffer(Buffer &&other) noexcept :
-    m_data(other.m_data),
-    m_size(other.m_size)
-{
-    other.m_data = nullptr;
-    other.m_size = 0;
-}
-
-
-xmrig::Buffer::Buffer(const Buffer &other)
-{
-    copy(other.data(), other.size());
-}
-
-
-xmrig::Buffer::Buffer(const char *data, size_t size)
-{
-    copy(data, size);
-}
-
-
-xmrig::Buffer::Buffer(size_t size) :
-    m_size(size)
-{
-    if (size > 0) {
-        m_data = new char[size]();
-    }
-}
-
-
-xmrig::Buffer::~Buffer()
-{
-    delete [] m_data;
-}
-
-
-void xmrig::Buffer::from(const char *data, size_t size)
-{
-    if (m_size > 0) {
-        if (m_size == size) {
-            memcpy(m_data, data, m_size);
-
-            return;
-        }
-
-        delete [] m_data;
-    }
-
-    copy(data, size);
-}
-
-
-xmrig::Buffer xmrig::Buffer::allocUnsafe(size_t size)
-{
-    if (size == 0) {
-        return {};
-    }
-
-    Buffer buf;
-    buf.m_size = size;
-    buf.m_data = new char[size];
-
-    return buf;
-}
-
-
-xmrig::Buffer xmrig::Buffer::randomBytes(const size_t size)
-{
-    Buffer buf(size);
-    std::uniform_int_distribution<> dis(0, 255);
-
-    for (size_t i = 0; i < size; ++i) {
-        buf.m_data[i] = static_cast<char>(dis(randomEngine));
-    }
-
-    return buf;
-}
-
-
-bool xmrig::Buffer::fromHex(const uint8_t *in, size_t size, uint8_t *out)
-{
-    bool error = false;
-    for (size_t i = 0; i < size; i += 2) {
-        out[i / 2] = static_cast<uint8_t>((hf_hex2bin(in[i], error) << 4) | hf_hex2bin(in[i + 1], error));
-
-        if (error) {
-            return false;
-        }
-    }
-
-    return true;
-}
-
-
-xmrig::Buffer xmrig::Buffer::fromHex(const char *data, size_t size)
-{
-    if (data == nullptr || size % 2 != 0) {
-        return {};
-    }
-
-    Buffer buf(size / 2);
-    if (!fromHex(data, size, buf.data())) {
-        return {};
-    }
-
-    return buf;
-}
-
-
-void xmrig::Buffer::toHex(const uint8_t *in, size_t size, uint8_t *out)
-{
-    for (size_t i = 0; i < size; i++) {
-        out[i * 2]     = hf_bin2hex((in[i] & 0xF0) >> 4);
-        out[i * 2 + 1] = hf_bin2hex(in[i] & 0x0F);
-    }
-}
-
-
-xmrig::String xmrig::Buffer::toHex() const
-{
-    if (m_size == 0) {
-        return String();
-    }
-
-    char *buf       = new char[m_size * 2 + 1];
-    buf[m_size * 2] = '\0';
-
-    toHex(m_data, m_size, buf);
-
-    return String(buf);
-}
-
-
-void xmrig::Buffer::copy(const char *data, size_t size)
-{
-    if (size == 0) {
-        m_data = nullptr;
-        m_size = 0;
-
-        return;
-    }
-
-    m_data = new char[size];
-    m_size = size;
-
-    memcpy(m_data, data, m_size);
-}
-
-
-void xmrig::Buffer::move(Buffer &&other)
-{
-    if (m_size > 0) {
-        delete [] m_data;
-    }
-
-    m_data = other.m_data;
-    m_size = other.m_size;
-
-    other.m_data = nullptr;
-    other.m_size = 0;
-}
diff --git a/src/base/tools/Buffer.h b/src/base/tools/Buffer.h
index 33b186c0..91c98e64 100644
--- a/src/base/tools/Buffer.h
+++ b/src/base/tools/Buffer.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,67 +20,14 @@
 #define XMRIG_BUFFER_H
 
 
-#include "base/tools/String.h"
+#include <cstdint>
+#include <vector>
 
 
 namespace xmrig {
 
 
-class Buffer
-{
-public:
-    Buffer() = default;
-    Buffer(Buffer &&other) noexcept;
-    Buffer(const Buffer &other);
-    Buffer(const char *data, size_t size);
-    Buffer(size_t size);
-    ~Buffer();
-
-
-    inline bool isEmpty() const                     { return size() == 0; }
-    inline bool isEqual(const Buffer &other) const  { return m_size == other.m_size && (m_size == 0 || memcmp(m_data, other.m_data, m_size) == 0); }
-    inline char *data()                             { return m_data; }
-    inline const char *data() const                 { return m_data; }
-    inline size_t size() const                      { return m_size; }
-    inline void from(const Buffer &other)           { from(other.data(), other.size()); }
-
-
-    void from(const char *data, size_t size);
-
-
-    inline bool operator!=(const Buffer &other) const   { return !isEqual(other); }
-    inline bool operator==(const Buffer &other) const   { return isEqual(other); }
-    inline Buffer &operator=(Buffer &&other) noexcept   { move(std::move(other)); return *this; }
-    inline Buffer &operator=(const Buffer &other)       { from(other); return *this; }
-
-
-    static Buffer allocUnsafe(size_t size);
-    static Buffer randomBytes(const size_t size);
-
-    static inline Buffer alloc(size_t size) { return Buffer(size); }
-
-
-    inline static bool fromHex(const char *in, size_t size, char *out)    { return fromHex(reinterpret_cast<const uint8_t *>(in), size, reinterpret_cast<uint8_t *>(out)); }
-    inline static bool fromHex(const char *in, size_t size, uint8_t *out) { return fromHex(reinterpret_cast<const uint8_t *>(in), size, out); }
-    inline static Buffer fromHex(const char *data)                        { return fromHex(data, strlen(data)); }
-    inline static Buffer fromHex(const String &str)                       { return fromHex(str.data(), str.size()); }
-    inline static String toHex(const char *in, size_t size)               { return Buffer(in, size).toHex(); }
-    inline static String toHex(const uint8_t *in, size_t size)            { return Buffer(reinterpret_cast<const char *>(in), size).toHex(); }
-    inline static void toHex(const char *in, size_t size, char *out)      { return toHex(reinterpret_cast<const uint8_t *>(in), size, reinterpret_cast<uint8_t *>(out)); }
-    inline static void toHex(const uint8_t *in, size_t size, char *out)   { return toHex(in, size, reinterpret_cast<uint8_t *>(out)); }
-
-    static bool fromHex(const uint8_t *in, size_t size, uint8_t *out);
-    static Buffer fromHex(const char *data, size_t size);
-    static void toHex(const uint8_t *in, size_t size, uint8_t *out);
-    String toHex() const;
-
-private:
-    void copy(const char *data, size_t size);
-    void move(Buffer &&other);
-
-    char *m_data    = nullptr;
-    size_t m_size   = 0;
-};
+using Buffer = std::vector<uint8_t>;
 
 
 } /* namespace xmrig */
diff --git a/src/base/tools/Cvt.cpp b/src/base/tools/Cvt.cpp
new file mode 100644
index 00000000..c80c022c
--- /dev/null
+++ b/src/base/tools/Cvt.cpp
@@ -0,0 +1,275 @@
+/* XMRig
+ * Copyright (c) 2013-2020 Frank Denis <j at pureftpd dot org>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "base/tools/Cvt.h"
+#include "3rdparty/rapidjson/document.h"
+
+
+#include <cassert>
+#include <random>
+
+
+#ifdef XMRIG_SODIUM
+#   include <sodium.h>
+#endif
+
+
+namespace xmrig {
+
+
+#ifndef XMRIG_SODIUM
+static std::random_device randomDevice;
+static std::mt19937 randomEngine(randomDevice());
+
+
+static char *cvt_bin2hex(char *const hex, const size_t hex_maxlen, const unsigned char *const bin, const size_t bin_len)
+{
+    size_t       i = 0U;
+    unsigned int x;
+    int          b;
+    int          c;
+
+    if (bin_len >= SIZE_MAX / 2 || hex_maxlen <= bin_len * 2U) {
+        return nullptr; /* LCOV_EXCL_LINE */
+    }
+
+    while (i < bin_len) {
+        c = bin[i] & 0xf;
+        b = bin[i] >> 4;
+        x = (unsigned char) (87U + c + (((c - 10U) >> 8) & ~38U)) << 8 |
+            (unsigned char) (87U + b + (((b - 10U) >> 8) & ~38U));
+        hex[i * 2U] = (char) x;
+        x >>= 8;
+        hex[i * 2U + 1U] = (char) x;
+        i++;
+    }
+    hex[i * 2U] = 0U;
+
+    return hex;
+}
+
+
+static int cvt_hex2bin(unsigned char *const bin, const size_t bin_maxlen, const char *const hex, const size_t hex_len, const char *const ignore, size_t *const bin_len, const char **const hex_end)
+{
+    size_t        bin_pos = 0U;
+    size_t        hex_pos = 0U;
+    int           ret     = 0;
+    unsigned char c;
+    unsigned char c_acc = 0U;
+    unsigned char c_alpha0;
+    unsigned char c_alpha;
+    unsigned char c_num0;
+    unsigned char c_num;
+    unsigned char c_val;
+    unsigned char state = 0U;
+
+    while (hex_pos < hex_len) {
+        c        = (unsigned char) hex[hex_pos];
+        c_num    = c ^ 48U;
+        c_num0   = (c_num - 10U) >> 8;
+        c_alpha  = (c & ~32U) - 55U;
+        c_alpha0 = ((c_alpha - 10U) ^ (c_alpha - 16U)) >> 8;
+
+        if ((c_num0 | c_alpha0) == 0U) {
+            if (ignore != nullptr && state == 0U && strchr(ignore, c) != nullptr) {
+                hex_pos++;
+                continue;
+            }
+            break;
+        }
+
+        c_val = (c_num0 & c_num) | (c_alpha0 & c_alpha);
+
+        if (bin_pos >= bin_maxlen) {
+            ret   = -1;
+            errno = ERANGE;
+            break;
+        }
+
+        if (state == 0U) {
+            c_acc = c_val * 16U;
+        } else {
+            bin[bin_pos++] = c_acc | c_val;
+        }
+
+        state = ~state;
+        hex_pos++;
+    }
+
+    if (state != 0U) {
+        hex_pos--;
+        errno = EINVAL;
+        ret = -1;
+    }
+
+    if (ret != 0) {
+        bin_pos = 0U;
+    }
+
+    if (hex_end != nullptr) {
+        *hex_end = &hex[hex_pos];
+    } else if (hex_pos != hex_len) {
+        errno = EINVAL;
+        ret = -1;
+    }
+
+    if (bin_len != nullptr) {
+        *bin_len = bin_pos;
+    }
+
+    return ret;
+}
+
+#define sodium_bin2hex cvt_bin2hex
+#define sodium_hex2bin cvt_hex2bin
+#endif
+
+
+template<typename T>
+inline bool fromHexImpl(T &buf, const char *in, size_t size)
+{
+    assert(in != nullptr && size > 0);
+    if (in == nullptr || size == 0) {
+        return false;
+    }
+
+    buf.resize(size / 2);
+
+    return sodium_hex2bin(reinterpret_cast<uint8_t *>(&buf.front()), buf.size(), in, size, nullptr, nullptr, nullptr) == 0;
+}
+
+
+} // namespace xmrig
+
+
+bool xmrig::Cvt::fromHex(Buffer &buf, const char *in, size_t size)
+{
+    return fromHexImpl(buf, in, size);
+}
+
+
+bool xmrig::Cvt::fromHex(Buffer &buf, const rapidjson::Value &value)
+{
+    if (!value.IsString()) {
+        return false;
+    }
+
+    return fromHexImpl(buf, value.GetString(), value.GetStringLength());
+}
+
+
+bool xmrig::Cvt::fromHex(std::string &buf, const char *in, size_t size)
+{
+    return fromHexImpl(buf, in, size);
+}
+
+
+bool xmrig::Cvt::fromHex(uint8_t *bin, size_t bin_maxlen, const char *hex, size_t hex_len)
+{
+    assert(hex != nullptr && hex_len > 0);
+    if (hex == nullptr || hex_len == 0) {
+        return false;
+    }
+
+    return sodium_hex2bin(bin, bin_maxlen, hex, hex_len, nullptr, nullptr, nullptr) == 0;
+}
+
+
+bool xmrig::Cvt::fromHex(uint8_t *bin, size_t max, const rapidjson::Value &value)
+{
+    if (!value.IsString()) {
+        return false;
+    }
+
+    return fromHex(bin, max, value.GetString(), value.GetStringLength());
+}
+
+
+xmrig::Buffer xmrig::Cvt::fromHex(const char *in, size_t size)
+{
+    Buffer buf;
+    if (!fromHex(buf, in, size)) {
+        return {};
+    }
+
+    return buf;
+}
+
+
+bool xmrig::Cvt::toHex(char *hex, size_t hex_maxlen, const uint8_t *bin, size_t bin_len)
+{
+    return sodium_bin2hex(hex, hex_maxlen, bin, bin_len) != nullptr;
+}
+
+
+xmrig::Buffer xmrig::Cvt::randomBytes(const size_t size)
+{
+    Buffer buf(size);
+
+#   ifndef XMRIG_SODIUM
+    std::uniform_int_distribution<> dis(0, 255);
+
+    for (size_t i = 0; i < size; ++i) {
+        buf[i] = static_cast<char>(dis(randomEngine));
+    }
+#   else
+    randombytes_buf(buf.data(), size);
+#   endif
+
+    return buf;
+}
+
+
+rapidjson::Value xmrig::Cvt::toHex(const Buffer &data, rapidjson::Document &doc)
+{
+    return toHex(data.data(), data.size(), doc);
+}
+
+
+rapidjson::Value xmrig::Cvt::toHex(const std::string &data, rapidjson::Document &doc)
+{
+    return toHex(reinterpret_cast<const uint8_t *>(data.data()), data.size(), doc);
+}
+
+
+rapidjson::Value xmrig::Cvt::toHex(const uint8_t *in, size_t size, rapidjson::Document &doc)
+{
+    return toHex(in, size).toJSON(doc);
+}
+
+
+xmrig::String xmrig::Cvt::toHex(const uint8_t *in, size_t size)
+{
+    assert(in != nullptr && size > 0);
+    if (in == nullptr || size == 0) {
+        return {};
+    }
+
+    const size_t hex_maxlen = size * 2 + 1;
+
+    char *buf = new char[hex_maxlen];
+    if (!toHex(buf, hex_maxlen, in, size)) {
+        delete [] buf;
+
+        return {};
+    }
+
+    return buf;
+}
diff --git a/src/base/tools/Cvt.h b/src/base/tools/Cvt.h
new file mode 100644
index 00000000..8b67b146
--- /dev/null
+++ b/src/base/tools/Cvt.h
@@ -0,0 +1,61 @@
+/* XMRig
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef XMRIG_CVT_H
+#define XMRIG_CVT_H
+
+
+#include "3rdparty/rapidjson/fwd.h"
+#include "base/tools/Buffer.h"
+#include "base/tools/String.h"
+
+
+#include <string>
+
+
+namespace xmrig {
+
+
+class Cvt
+{
+public:
+    inline static bool fromHex(Buffer &buf, const String &hex)                  { return fromHex(buf, hex.data(), hex.size()); }
+    inline static Buffer fromHex(const std::string &hex)                        { return fromHex(hex.data(), hex.size()); }
+    inline static Buffer fromHex(const String &hex)                             { return fromHex(hex.data(), hex.size()); }
+    inline static String toHex(const Buffer &data)                              { return toHex(data.data(), data.size()); }
+    inline static String toHex(const std::string &data)                         { return toHex(reinterpret_cast<const uint8_t *>(data.data()), data.size()); }
+
+    static bool fromHex(Buffer &buf, const char *in, size_t size);
+    static bool fromHex(Buffer &buf, const rapidjson::Value &value);
+    static bool fromHex(std::string &buf, const char *in, size_t size);
+    static bool fromHex(uint8_t *bin, size_t bin_maxlen, const char *hex, size_t hex_len);
+    static bool fromHex(uint8_t *bin, size_t bin_maxlen, const rapidjson::Value &value);
+    static bool toHex(char *hex, size_t hex_maxlen, const uint8_t *bin, size_t bin_len);
+    static Buffer fromHex(const char *in, size_t size);
+    static Buffer randomBytes(size_t size);
+    static rapidjson::Value toHex(const Buffer &data, rapidjson::Document &doc);
+    static rapidjson::Value toHex(const std::string &data, rapidjson::Document &doc);
+    static rapidjson::Value toHex(const uint8_t *in, size_t size, rapidjson::Document &doc);
+    static String toHex(const uint8_t *in, size_t size);
+};
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_CVT_H */
diff --git a/src/core/Miner.cpp b/src/core/Miner.cpp
index 67a93488..9c96d1e3 100644
--- a/src/core/Miner.cpp
+++ b/src/core/Miner.cpp
@@ -38,12 +38,10 @@
 #include "base/kernel/Platform.h"
 #include "base/net/stratum/Job.h"
 #include "base/tools/Object.h"
-#include "base/tools/Profiler.h"
 #include "base/tools/Timer.h"
 #include "core/config/Config.h"
 #include "core/Controller.h"
 #include "crypto/common/Nonce.h"
-#include "crypto/rx/Rx.h"
 #include "version.h"
 
 
@@ -64,6 +62,8 @@
 
 
 #ifdef XMRIG_ALGO_RANDOMX
+#   include "crypto/rx/Profiler.h"
+#   include "crypto/rx/Rx.h"
 #   include "crypto/rx/RxConfig.h"
 #endif
 
@@ -203,7 +203,7 @@ public:
                 continue;
             }
 
-            for (size_t i = 1; i < hr->threads(); i++) {
+            for (size_t i = 0; i < hr->threads(); i++) {
                 Value thread(kArrayType);
                 thread.PushBack(Hashrate::normalize(hr->calc(i, Hashrate::ShortInterval)),  allocator);
                 thread.PushBack(Hashrate::normalize(hr->calc(i, Hashrate::MediumInterval)), allocator);
diff --git a/src/crypto/common/Assembly.cpp b/src/crypto/common/Assembly.cpp
index 5b7f8959..eb6b8537 100644
--- a/src/crypto/common/Assembly.cpp
+++ b/src/crypto/common/Assembly.cpp
@@ -1,13 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      SChernykh   <https://github.com/SChernykh>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,8 +17,8 @@
  */
 
 
-#include <assert.h>
-#include <string.h>
+#include <cassert>
+#include <cstring>
 
 
 #ifdef _MSC_VER
diff --git a/src/crypto/common/Assembly.h b/src/crypto/common/Assembly.h
index 803ea716..8d7ba43c 100644
--- a/src/crypto/common/Assembly.h
+++ b/src/crypto/common/Assembly.h
@@ -1,12 +1,6 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -57,6 +51,7 @@ public:
     rapidjson::Value toJSON() const;
 
     inline bool isEqual(const Assembly &other) const      { return m_id == other.m_id; }
+    inline Id id() const                                  { return m_id; }
 
     inline bool operator!=(Assembly::Id id) const         { return m_id != id; }
     inline bool operator!=(const Assembly &other) const   { return !isEqual(other); }
diff --git a/src/crypto/randomx/aes_hash.cpp b/src/crypto/randomx/aes_hash.cpp
index 6697a4ed..4d0ee7a2 100644
--- a/src/crypto/randomx/aes_hash.cpp
+++ b/src/crypto/randomx/aes_hash.cpp
@@ -30,10 +30,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <vector>
 
 #include "crypto/randomx/aes_hash.hpp"
-#include "crypto/randomx/soft_aes.h"
-#include "crypto/randomx/randomx.h"
 #include "base/tools/Chrono.h"
-#include "base/tools/Profiler.h"
+#include "crypto/randomx/randomx.h"
+#include "crypto/randomx/soft_aes.h"
+#include "crypto/rx/Profiler.h"
 
 #define AES_HASH_1R_STATE0 0xd7983aad, 0xcc82db47, 0x9fa856de, 0x92b52c0d
 #define AES_HASH_1R_STATE1 0xace78057, 0xf59e125a, 0x15c7b798, 0x338d996e
diff --git a/src/crypto/randomx/jit_compiler_x86.cpp b/src/crypto/randomx/jit_compiler_x86.cpp
index 9753701e..4d5d0ee1 100644
--- a/src/crypto/randomx/jit_compiler_x86.cpp
+++ b/src/crypto/randomx/jit_compiler_x86.cpp
@@ -31,13 +31,13 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <climits>
 #include <atomic>
 #include "crypto/randomx/jit_compiler_x86.hpp"
+#include "backend/cpu/Cpu.h"
 #include "crypto/randomx/jit_compiler_x86_static.hpp"
-#include "crypto/randomx/superscalar.hpp"
 #include "crypto/randomx/program.hpp"
 #include "crypto/randomx/reciprocal.h"
+#include "crypto/randomx/superscalar.hpp"
 #include "crypto/randomx/virtual_memory.hpp"
-#include "base/tools/Profiler.h"
-#include "backend/cpu/Cpu.h"
+#include "crypto/rx/Profiler.h"
 
 #ifdef XMRIG_FIX_RYZEN
 #   include "crypto/rx/Rx.h"
diff --git a/src/crypto/randomx/randomx.cpp b/src/crypto/randomx/randomx.cpp
index 9dd4aeee..28b9f39a 100644
--- a/src/crypto/randomx/randomx.cpp
+++ b/src/crypto/randomx/randomx.cpp
@@ -47,7 +47,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <cassert>
 
-#include "base/tools/Profiler.h"
+#include "crypto/rx/Profiler.h"
 
 RandomX_ConfigurationWownero::RandomX_ConfigurationWownero()
 {
diff --git a/src/crypto/randomx/virtual_machine.cpp b/src/crypto/randomx/virtual_machine.cpp
index 4a6990b2..43e19939 100644
--- a/src/crypto/randomx/virtual_machine.cpp
+++ b/src/crypto/randomx/virtual_machine.cpp
@@ -30,13 +30,13 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <iomanip>
 #include <stdexcept>
 #include "crypto/randomx/virtual_machine.hpp"
-#include "crypto/randomx/common.hpp"
 #include "crypto/randomx/aes_hash.hpp"
-#include "crypto/randomx/blake2/blake2.h"
-#include "crypto/randomx/intrin_portable.h"
 #include "crypto/randomx/allocator.hpp"
+#include "crypto/randomx/blake2/blake2.h"
+#include "crypto/randomx/common.hpp"
+#include "crypto/randomx/intrin_portable.h"
 #include "crypto/randomx/soft_aes.h"
-#include "base/tools/Profiler.h"
+#include "crypto/rx/Profiler.h"
 
 randomx_vm::~randomx_vm() {
 
diff --git a/src/crypto/randomx/vm_compiled.cpp b/src/crypto/randomx/vm_compiled.cpp
index c32034b3..c40247d9 100644
--- a/src/crypto/randomx/vm_compiled.cpp
+++ b/src/crypto/randomx/vm_compiled.cpp
@@ -28,7 +28,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "crypto/randomx/vm_compiled.hpp"
 #include "crypto/randomx/common.hpp"
-#include "base/tools/Profiler.h"
+#include "crypto/rx/Profiler.h"
 
 namespace randomx {
 
diff --git a/src/base/tools/Profiler.cpp b/src/crypto/rx/Profiler.cpp
similarity index 93%
rename from src/base/tools/Profiler.cpp
rename to src/crypto/rx/Profiler.cpp
index ac2a6d2c..9cfe72a0 100644
--- a/src/base/tools/Profiler.cpp
+++ b/src/crypto/rx/Profiler.cpp
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,11 @@
  */
 
 
-#include "base/tools/Profiler.h"
+#include "crypto/rx/Profiler.h"
 #include "base/io/log/Log.h"
 #include "base/io/log/Tags.h"
+
+
 #include <cstring>
 #include <sstream>
 #include <thread>
diff --git a/src/base/tools/Profiler.h b/src/crypto/rx/Profiler.h
similarity index 94%
rename from src/base/tools/Profiler.h
rename to src/crypto/rx/Profiler.h
index ae3470f8..ca7d29db 100644
--- a/src/base/tools/Profiler.h
+++ b/src/crypto/rx/Profiler.h
@@ -1,6 +1,6 @@
 /* XMRig
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/crypto/rx/Rx.cpp b/src/crypto/rx/Rx.cpp
index 2fffb0e6..ea671d01 100644
--- a/src/crypto/rx/Rx.cpp
+++ b/src/crypto/rx/Rx.cpp
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/crypto/rx/Rx.h b/src/crypto/rx/Rx.h
index 1c452e8b..42bd0c15 100644
--- a/src/crypto/rx/Rx.h
+++ b/src/crypto/rx/Rx.h
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/crypto/rx/RxAlgo.cpp b/src/crypto/rx/RxAlgo.cpp
index 91d2c195..b7d2b083 100644
--- a/src/crypto/rx/RxAlgo.cpp
+++ b/src/crypto/rx/RxAlgo.cpp
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/crypto/rx/RxAlgo.h b/src/crypto/rx/RxAlgo.h
index 81c4687c..0cbbbd35 100644
--- a/src/crypto/rx/RxAlgo.h
+++ b/src/crypto/rx/RxAlgo.h
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/crypto/rx/RxBasicStorage.cpp b/src/crypto/rx/RxBasicStorage.cpp
index 7f389666..eacb6295 100644
--- a/src/crypto/rx/RxBasicStorage.cpp
+++ b/src/crypto/rx/RxBasicStorage.cpp
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -30,7 +23,6 @@
 #include "base/io/log/Log.h"
 #include "base/io/log/Tags.h"
 #include "base/tools/Chrono.h"
-#include "base/tools/Object.h"
 #include "crypto/rx/RxAlgo.h"
 #include "crypto/rx/RxCache.h"
 #include "crypto/rx/RxDataset.h"
diff --git a/src/crypto/rx/RxBasicStorage.h b/src/crypto/rx/RxBasicStorage.h
index c689df83..463b479e 100644
--- a/src/crypto/rx/RxBasicStorage.h
+++ b/src/crypto/rx/RxBasicStorage.h
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,7 +22,6 @@
 
 
 #include "backend/common/interfaces/IRxStorage.h"
-#include "base/tools/Object.h"
 
 
 namespace xmrig
diff --git a/src/crypto/rx/RxConfig.cpp b/src/crypto/rx/RxConfig.cpp
index c501e712..d9f05d4e 100644
--- a/src/crypto/rx/RxConfig.cpp
+++ b/src/crypto/rx/RxConfig.cpp
@@ -122,7 +122,7 @@ bool xmrig::RxConfig::read(const rapidjson::Value &value)
         }
 #       endif
 
-        const uint32_t mode = static_cast<uint32_t>(Json::getInt(value, kScratchpadPrefetchMode, static_cast<int>(m_scratchpadPrefetchMode)));
+        const auto mode = static_cast<uint32_t>(Json::getInt(value, kScratchpadPrefetchMode, static_cast<int>(m_scratchpadPrefetchMode)));
         if (mode < ScratchpadPrefetchMax) {
             m_scratchpadPrefetchMode = static_cast<ScratchpadPrefetchMode>(mode);
         }
diff --git a/src/crypto/rx/RxDataset.cpp b/src/crypto/rx/RxDataset.cpp
index c207d6f4..410a2f34 100644
--- a/src/crypto/rx/RxDataset.cpp
+++ b/src/crypto/rx/RxDataset.cpp
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -30,6 +23,7 @@
 #include "base/io/log/Tags.h"
 #include "base/kernel/Platform.h"
 #include "crypto/common/VirtualMemory.h"
+#include "crypto/randomx/randomx.h"
 #include "crypto/rx/RxAlgo.h"
 #include "crypto/rx/RxCache.h"
 
@@ -162,6 +156,22 @@ size_t xmrig::RxDataset::size(bool cache) const
 }
 
 
+uint8_t *xmrig::RxDataset::tryAllocateScrathpad()
+{
+    auto p = reinterpret_cast<uint8_t *>(raw());
+    if (!p) {
+        return nullptr;
+    }
+
+    const size_t offset = m_scratchpadOffset.fetch_add(RANDOMX_SCRATCHPAD_L3_MAX_SIZE);
+    if (offset + RANDOMX_SCRATCHPAD_L3_MAX_SIZE > m_scratchpadLimit) {
+        return nullptr;
+    }
+
+    return p + offset;
+}
+
+
 void *xmrig::RxDataset::raw() const
 {
     return m_dataset ? randomx_get_dataset_memory(m_dataset) : nullptr;
@@ -208,19 +218,3 @@ void xmrig::RxDataset::allocate(bool hugePages, bool oneGbPages)
     }
 #   endif
 }
-
-
-uint8_t* xmrig::RxDataset::tryAllocateScrathpad()
-{
-    uint8_t* p = reinterpret_cast<uint8_t*>(raw());
-    if (!p) {
-        return nullptr;
-    }
-
-    const size_t offset = m_scratchpadOffset.fetch_add(RANDOMX_SCRATCHPAD_L3_MAX_SIZE);
-    if (offset + RANDOMX_SCRATCHPAD_L3_MAX_SIZE > m_scratchpadLimit) {
-        return nullptr;
-    }
-
-    return p + offset;
-}
diff --git a/src/crypto/rx/RxDataset.h b/src/crypto/rx/RxDataset.h
index 798ec996..1621cae1 100644
--- a/src/crypto/rx/RxDataset.h
+++ b/src/crypto/rx/RxDataset.h
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -28,12 +21,10 @@
 #define XMRIG_RX_DATASET_H
 
 
-#include "base/crypto/Algorithm.h"
 #include "base/tools/Buffer.h"
 #include "base/tools/Object.h"
 #include "crypto/common/HugePagesInfo.h"
 #include "crypto/randomx/configuration.h"
-#include "crypto/randomx/randomx.h"
 #include "crypto/rx/RxConfig.h"
 
 #include <atomic>
@@ -68,11 +59,10 @@ public:
     bool isOneGbPages() const;
     HugePagesInfo hugePages(bool cache = true) const;
     size_t size(bool cache = true) const;
+    uint8_t *tryAllocateScrathpad();
     void *raw() const;
     void setRaw(const void *raw);
 
-    uint8_t *tryAllocateScrathpad();
-
     static inline constexpr size_t maxSize() { return RANDOMX_DATASET_MAX_SIZE; }
 
 private:
@@ -82,10 +72,9 @@ private:
     const uint32_t m_node;
     randomx_dataset *m_dataset  = nullptr;
     RxCache *m_cache            = nullptr;
-    VirtualMemory *m_memory     = nullptr;
-
-    std::atomic<size_t> m_scratchpadOffset;
     size_t m_scratchpadLimit    = 0;
+    std::atomic<size_t> m_scratchpadOffset{};
+    VirtualMemory *m_memory     = nullptr;
 };
 
 
diff --git a/src/crypto/rx/RxNUMAStorage.cpp b/src/crypto/rx/RxNUMAStorage.cpp
index 4b4ab4d6..6bd5627f 100644
--- a/src/crypto/rx/RxNUMAStorage.cpp
+++ b/src/crypto/rx/RxNUMAStorage.cpp
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -32,7 +25,6 @@
 #include "base/io/log/Tags.h"
 #include "base/kernel/Platform.h"
 #include "base/tools/Chrono.h"
-#include "base/tools/Object.h"
 #include "crypto/rx/RxAlgo.h"
 #include "crypto/rx/RxCache.h"
 #include "crypto/rx/RxDataset.h"
diff --git a/src/crypto/rx/RxNUMAStorage.h b/src/crypto/rx/RxNUMAStorage.h
index ef0d6431..29ec5fb0 100644
--- a/src/crypto/rx/RxNUMAStorage.h
+++ b/src/crypto/rx/RxNUMAStorage.h
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,7 +22,6 @@
 
 
 #include "backend/common/interfaces/IRxStorage.h"
-#include "base/tools/Object.h"
 
 
 #include <vector>
diff --git a/src/crypto/rx/RxQueue.cpp b/src/crypto/rx/RxQueue.cpp
index 8badab50..cbbac070 100644
--- a/src/crypto/rx/RxQueue.cpp
+++ b/src/crypto/rx/RxQueue.cpp
@@ -30,6 +30,7 @@
 #include "base/io/Async.h"
 #include "base/io/log/Log.h"
 #include "base/io/log/Tags.h"
+#include "base/tools/Cvt.h"
 #include "crypto/rx/RxBasicStorage.h"
 
 
@@ -149,7 +150,7 @@ void xmrig::RxQueue::backgroundInit()
                  item.nodeset.size() > 1 ? "s" : "",
                  item.seed.algorithm().shortName(),
                  item.threads,
-                 Buffer::toHex(item.seed.data().data(), 8).data()
+                 Cvt::toHex(item.seed.data().data(), 8).data()
                  );
 
         m_storage->init(item.seed, item.threads, item.hugePages, item.oneGbPages, item.mode, item.priority);
diff --git a/src/crypto/rx/RxVm.cpp b/src/crypto/rx/RxVm.cpp
index aa2217fc..f4b37375 100644
--- a/src/crypto/rx/RxVm.cpp
+++ b/src/crypto/rx/RxVm.cpp
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,6 +19,7 @@
 
 
 #include "crypto/randomx/randomx.h"
+#include "backend/cpu/Cpu.h"
 #include "crypto/rx/RxCache.h"
 #include "crypto/rx/RxDataset.h"
 #include "crypto/rx/RxVm.h"
@@ -36,7 +30,7 @@ extern "C" uint32_t rx_blake2b_use_sse41;
 #endif
 
 
-randomx_vm* xmrig::RxVm::create(RxDataset *dataset, uint8_t *scratchpad, bool softAes, xmrig::Assembly assembly, uint32_t node)
+randomx_vm *xmrig::RxVm::create(RxDataset *dataset, uint8_t *scratchpad, bool softAes, const Assembly &assembly, uint32_t node)
 {
     int flags = 0;
 
@@ -52,11 +46,8 @@ randomx_vm* xmrig::RxVm::create(RxDataset *dataset, uint8_t *scratchpad, bool so
         flags |= RANDOMX_FLAG_JIT;
     }
 
-    if (assembly == Assembly::AUTO) {
-        assembly = Cpu::info()->assembly();
-    }
-
-    if ((assembly == Assembly::RYZEN) || (assembly == Assembly::BULLDOZER)) {
+    const auto asmId = assembly == Assembly::AUTO ? Cpu::info()->assembly() : assembly.id();
+    if ((asmId == Assembly::RYZEN) || (asmId == Assembly::BULLDOZER)) {
         flags |= RANDOMX_FLAG_AMD;
     }
 
diff --git a/src/crypto/rx/RxVm.h b/src/crypto/rx/RxVm.h
index 6397d726..424da209 100644
--- a/src/crypto/rx/RxVm.h
+++ b/src/crypto/rx/RxVm.h
@@ -1,14 +1,7 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador     <tevador@gmail.com>
- * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright (c) 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -28,10 +21,6 @@
 #define XMRIG_RX_VM_H
 
 
-#include "base/tools/Object.h"
-#include "backend/cpu/Cpu.h"
-
-
 #include <cstdint>
 
 
@@ -42,16 +31,15 @@ namespace xmrig
 {
 
 
+class Assembly;
 class RxDataset;
 
 
 class RxVm
 {
 public:
-    XMRIG_DISABLE_COPY_MOVE_DEFAULT(RxVm);
-
-    static randomx_vm* create(RxDataset *dataset, uint8_t *scratchpad, bool softAes, xmrig::Assembly assembly, uint32_t node);
-    static void destroy(randomx_vm* vm);
+    static randomx_vm *create(RxDataset *dataset, uint8_t *scratchpad, bool softAes, const Assembly &assembly, uint32_t node);
+    static void destroy(randomx_vm *vm);
 };
 
 
diff --git a/src/crypto/rx/Rx_linux.cpp b/src/crypto/rx/Rx_linux.cpp
index 62ce936a..1525f99d 100644
--- a/src/crypto/rx/Rx_linux.cpp
+++ b/src/crypto/rx/Rx_linux.cpp
@@ -1,16 +1,9 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik              <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler                   <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones              <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466                 <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee                <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak                 <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett              <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador                  <tevador@gmail.com>
- * Copyright 2000      Transmeta Corporation    <https://github.com/intel/msr-tools>
- * Copyright 2004-2008 H. Peter Anvin           <https://github.com/intel/msr-tools>
- * Copyright 2018-2020 SChernykh                <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig                    <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador                  <tevador@gmail.com>
+ * Copyright (c) 2000      Transmeta Corporation    <https://github.com/intel/msr-tools>
+ * Copyright (c) 2004-2008 H. Peter Anvin           <https://github.com/intel/msr-tools>
+ * Copyright (c) 2018-2020 SChernykh                <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig                    <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/crypto/rx/Rx_win.cpp b/src/crypto/rx/Rx_win.cpp
index b32c3dae..77e7c9b4 100644
--- a/src/crypto/rx/Rx_win.cpp
+++ b/src/crypto/rx/Rx_win.cpp
@@ -1,17 +1,10 @@
 /* XMRig
- * Copyright 2010      Jeff Garzik              <jgarzik@pobox.com>
- * Copyright 2012-2014 pooler                   <pooler@litecoinpool.org>
- * Copyright 2014      Lucas Jones              <https://github.com/lucasjones>
- * Copyright 2014-2016 Wolf9466                 <https://github.com/OhGodAPet>
- * Copyright 2016      Jay D Dee                <jayddee246@gmail.com>
- * Copyright 2017-2019 XMR-Stak                 <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2018      Lee Clagett              <https://github.com/vtnerd>
- * Copyright 2018-2019 tevador                  <tevador@gmail.com>
- * Copyright 2000      Transmeta Corporation    <https://github.com/intel/msr-tools>
- * Copyright 2004-2008 H. Peter Anvin           <https://github.com/intel/msr-tools>
- * Copyright 2007-2009 hiyohiyo                 <https://openlibsys.org>, <hiyohiyo@crystalmark.info>
- * Copyright 2018-2020 SChernykh                <https://github.com/SChernykh>
- * Copyright 2016-2020 XMRig                    <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright (c) 2018-2019 tevador                  <tevador@gmail.com>
+ * Copyright (c) 2000      Transmeta Corporation    <https://github.com/intel/msr-tools>
+ * Copyright (c) 2004-2008 H. Peter Anvin           <https://github.com/intel/msr-tools>
+ * Copyright (c) 2007-2009 hiyohiyo                 <https://openlibsys.org>, <hiyohiyo@crystalmark.info>
+ * Copyright (c) 2018-2020 SChernykh                <https://github.com/SChernykh>
+ * Copyright (c) 2016-2020 XMRig                    <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
diff --git a/src/net/strategies/DonateStrategy.cpp b/src/net/strategies/DonateStrategy.cpp
index f8a391d9..28a1b1cd 100644
--- a/src/net/strategies/DonateStrategy.cpp
+++ b/src/net/strategies/DonateStrategy.cpp
@@ -37,6 +37,7 @@
 #include "base/net/stratum/strategies/FailoverStrategy.h"
 #include "base/net/stratum/strategies/SinglePoolStrategy.h"
 #include "base/tools/Buffer.h"
+#include "base/tools/Cvt.h"
 #include "base/tools/Timer.h"
 #include "core/config/Config.h"
 #include "core/Controller.h"
@@ -65,9 +66,9 @@ xmrig::DonateStrategy::DonateStrategy(Controller *controller, IStrategyListener
 {
     uint8_t hash[200];
 
-    const String &user = controller->config()->pools().data().front().user();
+    const auto &user = controller->config()->pools().data().front().user();
     keccak(reinterpret_cast<const uint8_t *>(user.data()), user.size(), hash);
-    Buffer::toHex(hash, 32, m_userId);
+    Cvt::toHex(m_userId, sizeof(m_userId), hash, 32);
 
 #   ifdef XMRIG_ALGO_KAWPOW
     constexpr Pool::Mode mode = Pool::MODE_AUTO_ETH;
diff --git a/src/version.h b/src/version.h
index 11fed710..77ad0987 100644
--- a/src/version.h
+++ b/src/version.h
@@ -28,15 +28,15 @@
 #define APP_ID        "xmrig"
 #define APP_NAME      "XMRig"
 #define APP_DESC      "XMRig miner"
-#define APP_VERSION   "6.6.3-dev"
+#define APP_VERSION   "6.7.0-dev"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2020 xmrig.com"
 #define APP_KIND      "miner"
 
 #define APP_VER_MAJOR  6
-#define APP_VER_MINOR  6
-#define APP_VER_PATCH  3
+#define APP_VER_MINOR  7
+#define APP_VER_PATCH  0
 
 #ifdef _MSC_VER
 #   if (_MSC_VER >= 1920)