Merge upstream to daemonize changes

Preparation for PR

3 files changed, 13 insertions, 1 deletions

diff --git a/src/cryptonote_core/blockchain_storage.cpp b/src/cryptonote_core/blockchain_storage.cpp
index 35819dd3c..72dd35df7 100644
--- a/src/cryptonote_core/blockchain_storage.cpp
+++ b/src/cryptonote_core/blockchain_storage.cpp
@@ -1710,7 +1710,14 @@ bool blockchain_storage::handle_block_to_main_chain(const block& bl, const crypt
   bei.bl = bl;
   bei.block_cumulative_size = cumulative_block_size;
   bei.cumulative_difficulty = current_diffic;
-  bei.already_generated_coins = already_generated_coins + base_reward;
+
+  // In the "tail" state when the minimum subsidy (implemented in get_block_reward) is in effect, the number of 
+  // coins will eventually exceed MONEY_SUPPLY and overflow a uint64. To prevent overflow, cap already_generated_coins 
+  // at MONEY_SUPPLY. already_generated_coins is only used to compute the block subsidy and MONEY_SUPPLY yields a 
+  // subsidy of 0 under the base formula and therefore the minimum subsidy >0 in the tail state.
+
+  bei.already_generated_coins = base_reward < (MONEY_SUPPLY-already_generated_coins) ? already_generated_coins + base_reward : MONEY_SUPPLY;
+
   if(m_blocks.size())
     bei.cumulative_difficulty += m_blocks.back().cumulative_difficulty;
 
diff --git a/src/cryptonote_core/checkpoints_create.cpp b/src/cryptonote_core/checkpoints_create.cpp
index 9a21baac5..2cc9a8164 100644
--- a/src/cryptonote_core/checkpoints_create.cpp
+++ b/src/cryptonote_core/checkpoints_create.cpp
@@ -76,6 +76,7 @@ bool create_checkpoints(cryptonote::checkpoints& checkpoints)
   ADD_CHECKPOINT(231350, "b5add137199b820e1ea26640e5c3e121fd85faa86a1e39cf7e6cc097bdeb1131");
   ADD_CHECKPOINT(232150, "955de8e6b6508af2c24f7334f97beeea651d78e9ade3ab18fec3763be3201aa8");
   ADD_CHECKPOINT(249380, "654fb0a81ce3e5caf7e3264a70f447d4bd07586c08fa50f6638cc54da0a52b2d");
+  ADD_CHECKPOINT(460000, "75037a7aed3e765db96c75bcf908f59d690a5f3390baebb9edeafd336a1c4831");
 
   return true;
 }
diff --git a/src/cryptonote_core/cryptonote_basic_impl.cpp b/src/cryptonote_core/cryptonote_basic_impl.cpp
index a7416a7e4..f2d862e57 100644
--- a/src/cryptonote_core/cryptonote_basic_impl.cpp
+++ b/src/cryptonote_core/cryptonote_basic_impl.cpp
@@ -60,6 +60,10 @@ namespace cryptonote {
   //-----------------------------------------------------------------------------------------------
   bool get_block_reward(size_t median_size, size_t current_block_size, uint64_t already_generated_coins, uint64_t &reward) {
     uint64_t base_reward = (MONEY_SUPPLY - already_generated_coins) >> EMISSION_SPEED_FACTOR;
+    if (base_reward < FINAL_SUBSIDY_PER_MINUTE)
+    {
+      base_reward = FINAL_SUBSIDY_PER_MINUTE;
+    }
 
     //make it soft
     if (median_size < CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE) {