diff options
Diffstat (limited to 'src/cryptonote_core/blockchain_storage.cpp')
| -rw-r--r-- | src/cryptonote_core/blockchain_storage.cpp | 9 |
1 files changed, 8 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; |