core: move hardforks into its own lib

So it can be used by others without encumbrance

10 files changed, 220 insertions, 144 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8a21763c8..9bab56200 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -112,6 +112,7 @@ add_subdirectory(cryptonote_core)
 add_subdirectory(lmdb)
 add_subdirectory(multisig)
 add_subdirectory(net)
+add_subdirectory(hardforks)
 if(NOT IOS)
   add_subdirectory(blockchain_db)
 endif()
diff --git a/src/cryptonote_basic/hardfork.cpp b/src/cryptonote_basic/hardfork.cpp
index 98158a513..dfeca27b4 100644
--- a/src/cryptonote_basic/hardfork.cpp
+++ b/src/cryptonote_basic/hardfork.cpp
@@ -87,7 +87,7 @@ bool HardFork::add_fork(uint8_t version, uint64_t height, uint8_t threshold, tim
   }
   if (threshold > 100)
     return false;
-  heights.push_back(Params(version, height, threshold, time));
+  heights.push_back(hardfork_t(version, height, threshold, time));
   return true;
 }
 
@@ -171,7 +171,7 @@ void HardFork::init()
 
   // add a placeholder for the default version, to avoid special cases
   if (heights.empty())
-    heights.push_back(Params(original_version, 0, 0, 0));
+    heights.push_back(hardfork_t(original_version, 0, 0, 0));
 
   versions.clear();
   for (size_t n = 0; n < 256; ++n)
diff --git a/src/cryptonote_basic/hardfork.h b/src/cryptonote_basic/hardfork.h
index 123978b12..987dcc75a 100644
--- a/src/cryptonote_basic/hardfork.h
+++ b/src/cryptonote_basic/hardfork.h
@@ -29,6 +29,7 @@
 #pragma once
 
 #include "syncobj.h"
+#include "hardforks/hardforks.h"
 #include "cryptonote_basic/cryptonote_basic.h"
 
 namespace cryptonote
@@ -230,14 +231,6 @@ namespace cryptonote
      */
     uint64_t get_window_size() const { return window_size; }
 
-    struct Params {
-      uint8_t version;
-      uint8_t threshold;
-      uint64_t height;
-      time_t time;
-      Params(uint8_t version, uint64_t height, uint8_t threshold, time_t time): version(version), threshold(threshold), height(height), time(time) {}
-    };
-
   private:
 
     uint8_t get_block_version(uint64_t height) const;
@@ -262,7 +255,7 @@ namespace cryptonote
     uint8_t original_version;
     uint64_t original_version_till_height;
 
-    std::vector<Params> heights;
+    std::vector<hardfork_t> heights;
 
     std::deque<uint8_t> versions; /* rolling window of the last N blocks' versions */
     unsigned int last_versions[256]; /* count of the block versions in the last N blocks */
diff --git a/src/cryptonote_core/CMakeLists.txt b/src/cryptonote_core/CMakeLists.txt
index 2cbe89b01..cb3875878 100644
--- a/src/cryptonote_core/CMakeLists.txt
+++ b/src/cryptonote_core/CMakeLists.txt
@@ -58,6 +58,7 @@ target_link_libraries(cryptonote_core
     multisig
     ringct
     device
+    hardforks
     ${Boost_DATE_TIME_LIBRARY}
     ${Boost_PROGRAM_OPTIONS_LIBRARY}
     ${Boost_SERIALIZATION_LIBRARY}
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 798a73c4f..643c04946 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -41,6 +41,7 @@
 #include "cryptonote_basic/cryptonote_boost_serialization.h"
 #include "cryptonote_config.h"
 #include "cryptonote_basic/miner.h"
+#include "hardforks/hardforks.h"
 #include "misc_language.h"
 #include "profile_tools.h"
 #include "file_io_utils.h"
@@ -83,95 +84,6 @@ DISABLE_VS_WARNINGS(4267)
 // used to overestimate the block reward when estimating a per kB to use
 #define BLOCK_REWARD_OVERESTIMATE (10 * 1000000000000)
 
-static const struct {
-  uint8_t version;
-  uint64_t height;
-  uint8_t threshold;
-  time_t time;
-} mainnet_hard_forks[] = {
-  // version 1 from the start of the blockchain
-  { 1, 1, 0, 1341378000 },
-
-  // version 2 starts from block 1009827, which is on or around the 20th of March, 2016. Fork time finalised on 2015-09-20. No fork voting occurs for the v2 fork.
-  { 2, 1009827, 0, 1442763710 },
-
-  // version 3 starts from block 1141317, which is on or around the 24th of September, 2016. Fork time finalised on 2016-03-21.
-  { 3, 1141317, 0, 1458558528 },
-  
-  // version 4 starts from block 1220516, which is on or around the 5th of January, 2017. Fork time finalised on 2016-09-18.
-  { 4, 1220516, 0, 1483574400 },
-  
-  // version 5 starts from block 1288616, which is on or around the 15th of April, 2017. Fork time finalised on 2017-03-14.
-  { 5, 1288616, 0, 1489520158 },  
-
-  // version 6 starts from block 1400000, which is on or around the 16th of September, 2017. Fork time finalised on 2017-08-18.
-  { 6, 1400000, 0, 1503046577 },
-
-  // version 7 starts from block 1546000, which is on or around the 6th of April, 2018. Fork time finalised on 2018-03-17.
-  { 7, 1546000, 0, 1521303150 },
-
-  // version 8 starts from block 1685555, which is on or around the 18th of October, 2018. Fork time finalised on 2018-09-02.
-  { 8, 1685555, 0, 1535889547 },
-
-  // version 9 starts from block 1686275, which is on or around the 19th of October, 2018. Fork time finalised on 2018-09-02.
-  { 9, 1686275, 0, 1535889548 },
-
-  // version 10 starts from block 1788000, which is on or around the 9th of March, 2019. Fork time finalised on 2019-02-10.
-  { 10, 1788000, 0, 1549792439 },
-
-  // version 11 starts from block 1788720, which is on or around the 10th of March, 2019. Fork time finalised on 2019-02-15.
-  { 11, 1788720, 0, 1550225678 },
-};
-static const uint64_t mainnet_hard_fork_version_1_till = 1009826;
-
-static const struct {
-  uint8_t version;
-  uint64_t height;
-  uint8_t threshold;
-  time_t time;
-} testnet_hard_forks[] = {
-  // version 1 from the start of the blockchain
-  { 1, 1, 0, 1341378000 },
-
-  // version 2 starts from block 624634, which is on or around the 23rd of November, 2015. Fork time finalised on 2015-11-20. No fork voting occurs for the v2 fork.
-  { 2, 624634, 0, 1445355000 },
-
-  // versions 3-5 were passed in rapid succession from September 18th, 2016
-  { 3, 800500, 0, 1472415034 },
-  { 4, 801219, 0, 1472415035 },
-  { 5, 802660, 0, 1472415036 + 86400*180 }, // add 5 months on testnet to shut the update warning up since there's a large gap to v6
-
-  { 6, 971400, 0, 1501709789 },
-  { 7, 1057027, 0, 1512211236 },
-  { 8, 1057058, 0, 1533211200 },
-  { 9, 1057778, 0, 1533297600 },
-  { 10, 1154318, 0, 1550153694 },
-  { 11, 1155038, 0, 1550225678 },
-};
-static const uint64_t testnet_hard_fork_version_1_till = 624633;
-
-static const struct {
-  uint8_t version;
-  uint64_t height;
-  uint8_t threshold;
-  time_t time;
-} stagenet_hard_forks[] = {
-  // version 1 from the start of the blockchain
-  { 1, 1, 0, 1341378000 },
-
-  // versions 2-7 in rapid succession from March 13th, 2018
-  { 2, 32000, 0, 1521000000 },
-  { 3, 33000, 0, 1521120000 },
-  { 4, 34000, 0, 1521240000 },
-  { 5, 35000, 0, 1521360000 },
-  { 6, 36000, 0, 1521480000 },
-  { 7, 37000, 0, 1521600000 },
-  { 8, 176456, 0, 1537821770 },
-  { 9, 177176, 0, 1537821771 },
-  { 10, 269000, 0, 1550153694 },
-  { 11, 269720, 0, 1550225678 },
-};
-
 //------------------------------------------------------------------
 Blockchain::Blockchain(tx_memory_pool& tx_pool) :
   m_db(), m_tx_pool(tx_pool), m_hardfork(NULL), m_timestamps_and_difficulties_height(0), m_current_block_cumul_weight_limit(0), m_current_block_cumul_weight_median(0),
@@ -403,17 +315,17 @@ bool Blockchain::init(BlockchainDB* db, const network_type nettype, bool offline
   }
   else if (m_nettype == TESTNET)
   {
-    for (size_t n = 0; n < sizeof(testnet_hard_forks) / sizeof(testnet_hard_forks[0]); ++n)
+    for (size_t n = 0; n < num_testnet_hard_forks; ++n)
       m_hardfork->add_fork(testnet_hard_forks[n].version, testnet_hard_forks[n].height, testnet_hard_forks[n].threshold, testnet_hard_forks[n].time);
   }
   else if (m_nettype == STAGENET)
   {
-    for (size_t n = 0; n < sizeof(stagenet_hard_forks) / sizeof(stagenet_hard_forks[0]); ++n)
+    for (size_t n = 0; n < num_stagenet_hard_forks; ++n)
       m_hardfork->add_fork(stagenet_hard_forks[n].version, stagenet_hard_forks[n].height, stagenet_hard_forks[n].threshold, stagenet_hard_forks[n].time);
   }
   else
   {
-    for (size_t n = 0; n < sizeof(mainnet_hard_forks) / sizeof(mainnet_hard_forks[0]); ++n)
+    for (size_t n = 0; n < num_mainnet_hard_forks; ++n)
       m_hardfork->add_fork(mainnet_hard_forks[n].version, mainnet_hard_forks[n].height, mainnet_hard_forks[n].threshold, mainnet_hard_forks[n].time);
   }
   m_hardfork->init();
@@ -4802,39 +4714,6 @@ HardFork::State Blockchain::get_hard_fork_state() const
   return m_hardfork->get_state();
 }
 
-const std::vector<HardFork::Params>& Blockchain::get_hard_fork_heights(network_type nettype)
-{
-  static const std::vector<HardFork::Params> mainnet_heights = []()
-  {
-    std::vector<HardFork::Params> heights;
-    for (const auto& i : mainnet_hard_forks)
-      heights.emplace_back(i.version, i.height, i.threshold, i.time);
-    return heights;
-  }();
-  static const std::vector<HardFork::Params> testnet_heights = []()
-  {
-    std::vector<HardFork::Params> heights;
-    for (const auto& i : testnet_hard_forks)
-      heights.emplace_back(i.version, i.height, i.threshold, i.time);
-    return heights;
-  }();
-  static const std::vector<HardFork::Params> stagenet_heights = []()
-  {
-    std::vector<HardFork::Params> heights;
-    for (const auto& i : stagenet_hard_forks)
-      heights.emplace_back(i.version, i.height, i.threshold, i.time);
-    return heights;
-  }();
-  static const std::vector<HardFork::Params> dummy;
-  switch (nettype)
-  {
-    case MAINNET: return mainnet_heights;
-    case TESTNET: return testnet_heights;
-    case STAGENET: return stagenet_heights;
-    default: return dummy;
-  }
-}
-
 bool Blockchain::get_hard_fork_voting_info(uint8_t version, uint32_t &window, uint32_t &votes, uint32_t &threshold, uint64_t &earliest_height, uint8_t &voting) const
 {
   return m_hardfork->get_voting_info(version, window, votes, threshold, earliest_height, voting);
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index f32645949..178b2cb24 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -763,13 +763,6 @@ namespace cryptonote
     HardFork::State get_hard_fork_state() const;
 
     /**
-     * @brief gets the hardfork heights of given network
-     *
-     * @return the HardFork object
-     */
-    static const std::vector<HardFork::Params>& get_hard_fork_heights(network_type nettype);
-
-    /**
      * @brief gets the current hardfork version in use/voted for
      *
      * @return the version
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index 0147bde23..90ae43b7b 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -51,6 +51,7 @@ using namespace epee;
 #include "blockchain_db/blockchain_db.h"
 #include "ringct/rctSigs.h"
 #include "common/notify.h"
+#include "hardforks/hardforks.h"
 #include "version.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY
@@ -634,7 +635,7 @@ namespace cryptonote
       MERROR("Failed to parse block rate notify spec: " << e.what());
     }
 
-    const std::pair<uint8_t, uint64_t> regtest_hard_forks[3] = {std::make_pair(1, 0), std::make_pair(Blockchain::get_hard_fork_heights(MAINNET).back().version, 1), std::make_pair(0, 0)};
+    const std::pair<uint8_t, uint64_t> regtest_hard_forks[3] = {std::make_pair(1, 0), std::make_pair(mainnet_hard_forks[num_mainnet_hard_forks-1].version, 1), std::make_pair(0, 0)};
     const cryptonote::test_options regtest_test_options = {
       regtest_hard_forks,
       0
diff --git a/src/hardforks/CMakeLists.txt b/src/hardforks/CMakeLists.txt
new file mode 100644
index 000000000..bd2d14ceb
--- /dev/null
+++ b/src/hardforks/CMakeLists.txt
@@ -0,0 +1,47 @@
+# Copyright (c) 2014-2019, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set(hardforks_sources
+  hardforks.cpp)
+
+set(hardforks_headers
+  hardforks.h)
+
+set(hardforks_private_headers)
+
+monero_private_headers(hardforks
+  ${hardforks_private_headers})
+monero_add_library(hardforks
+  ${hardforks_sources}
+  ${hardforks_headers}
+  ${hardforks_private_headers})
+target_link_libraries(hardforks
+  PUBLIC
+    version
+  PRIVATE
+    ${EXTRA_LIBRARIES})
diff --git a/src/hardforks/hardforks.cpp b/src/hardforks/hardforks.cpp
new file mode 100644
index 000000000..3cb148c60
--- /dev/null
+++ b/src/hardforks/hardforks.cpp
@@ -0,0 +1,109 @@
+// Copyright (c) 2014-2019, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "hardforks.h"
+
+#undef MONERO_DEFAULT_LOG_CATEGORY
+#define MONERO_DEFAULT_LOG_CATEGORY "blockchain.hardforks"
+
+const hardfork_t mainnet_hard_forks[] = {
+  // version 1 from the start of the blockchain
+  { 1, 1, 0, 1341378000 },
+
+  // version 2 starts from block 1009827, which is on or around the 20th of March, 2016. Fork time finalised on 2015-09-20. No fork voting occurs for the v2 fork.
+  { 2, 1009827, 0, 1442763710 },
+
+  // version 3 starts from block 1141317, which is on or around the 24th of September, 2016. Fork time finalised on 2016-03-21.
+  { 3, 1141317, 0, 1458558528 },
+
+  // version 4 starts from block 1220516, which is on or around the 5th of January, 2017. Fork time finalised on 2016-09-18.
+  { 4, 1220516, 0, 1483574400 },
+
+  // version 5 starts from block 1288616, which is on or around the 15th of April, 2017. Fork time finalised on 2017-03-14.
+  { 5, 1288616, 0, 1489520158 }, 
+
+  // version 6 starts from block 1400000, which is on or around the 16th of September, 2017. Fork time finalised on 2017-08-18.
+  { 6, 1400000, 0, 1503046577 },
+
+  // version 7 starts from block 1546000, which is on or around the 6th of April, 2018. Fork time finalised on 2018-03-17.
+  { 7, 1546000, 0, 1521303150 },
+
+  // version 8 starts from block 1685555, which is on or around the 18th of October, 2018. Fork time finalised on 2018-09-02.
+  { 8, 1685555, 0, 1535889547 },
+
+  // version 9 starts from block 1686275, which is on or around the 19th of October, 2018. Fork time finalised on 2018-09-02.
+  { 9, 1686275, 0, 1535889548 },
+
+  // version 10 starts from block 1788000, which is on or around the 9th of March, 2019. Fork time finalised on 2019-02-10.
+  { 10, 1788000, 0, 1549792439 },
+
+  // version 11 starts from block 1788720, which is on or around the 10th of March, 2019. Fork time finalised on 2019-02-15.
+  { 11, 1788720, 0, 1550225678 },
+};
+const size_t num_mainnet_hard_forks = sizeof(mainnet_hard_forks) / sizeof(mainnet_hard_forks[0]);
+const uint64_t mainnet_hard_fork_version_1_till = 1009826;
+
+const hardfork_t testnet_hard_forks[] = {
+  // version 1 from the start of the blockchain
+  { 1, 1, 0, 1341378000 },
+
+  // version 2 starts from block 624634, which is on or around the 23rd of November, 2015. Fork time finalised on 2015-11-20. No fork voting occurs for the v2 fork.
+  { 2, 624634, 0, 1445355000 },
+
+  // versions 3-5 were passed in rapid succession from September 18th, 2016
+  { 3, 800500, 0, 1472415034 },
+  { 4, 801219, 0, 1472415035 },
+  { 5, 802660, 0, 1472415036 + 86400*180 }, // add 5 months on testnet to shut the update warning up since there's a large gap to v6
+
+  { 6, 971400, 0, 1501709789 },
+  { 7, 1057027, 0, 1512211236 },
+  { 8, 1057058, 0, 1533211200 },
+  { 9, 1057778, 0, 1533297600 },
+  { 10, 1154318, 0, 1550153694 },
+  { 11, 1155038, 0, 1550225678 },
+};
+const size_t num_testnet_hard_forks = sizeof(testnet_hard_forks) / sizeof(testnet_hard_forks[0]);
+const uint64_t testnet_hard_fork_version_1_till = 624633;
+
+const hardfork_t stagenet_hard_forks[] = {
+  // version 1 from the start of the blockchain
+  { 1, 1, 0, 1341378000 },
+
+  // versions 2-7 in rapid succession from March 13th, 2018
+  { 2, 32000, 0, 1521000000 },
+  { 3, 33000, 0, 1521120000 },
+  { 4, 34000, 0, 1521240000 },
+  { 5, 35000, 0, 1521360000 },
+  { 6, 36000, 0, 1521480000 },
+  { 7, 37000, 0, 1521600000 },
+  { 8, 176456, 0, 1537821770 },
+  { 9, 177176, 0, 1537821771 },
+  { 10, 269000, 0, 1550153694 },
+  { 11, 269720, 0, 1550225678 },
+};
+const size_t num_stagenet_hard_forks = sizeof(stagenet_hard_forks) / sizeof(stagenet_hard_forks[0]);
diff --git a/src/hardforks/hardforks.h b/src/hardforks/hardforks.h
new file mode 100644
index 000000000..e7bceca42
--- /dev/null
+++ b/src/hardforks/hardforks.h
@@ -0,0 +1,52 @@
+// Copyright (c) 2014-2019, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include <stdint.h>
+#include <time.h>
+
+struct hardfork_t
+{
+  uint8_t version;
+  uint64_t height;
+  uint8_t threshold;
+  time_t time;
+  hardfork_t(uint8_t version, uint64_t height, uint8_t threshold, time_t time): version(version), height(height), threshold(threshold), time(time) {}
+};
+
+extern const hardfork_t mainnet_hard_forks[];
+extern const uint64_t mainnet_hard_fork_version_1_till;
+extern const size_t num_mainnet_hard_forks;
+
+extern const hardfork_t testnet_hard_forks[];
+extern const uint64_t testnet_hard_fork_version_1_till;
+extern const size_t num_testnet_hard_forks;
+
+extern const hardfork_t stagenet_hard_forks[];
+extern const size_t num_stagenet_hard_forks;