Cypher_Stack/wownero
2
0
Fork 0
mirror of https://git.wownero.com/wownero/wownero.git synced 2025-01-09 11:38:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

fix timestamp check

Browse Source
This commit is contained in:
wowario 2020-09-20 22:27:21 +03:00
parent 9c35901592
commit 32497a641c
No known key found for this signature in database
GPG Key ID: 24DCBE762DE9C111
1 changed files with 13 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
src/cryptonote_core/blockchain.cpp
View File

@ -1020,14 +1020,15 @@ size_t Blockchain::recalculate_difficulties(boost::optional<uint64_t> start_heig
const uint64_t start_height = start_height_opt ? *start_height_opt : check_difficulty_checkpoints().second; const uint64_t start_height = start_height_opt ? *start_height_opt : check_difficulty_checkpoints().second;
const uint64_t top_height = m_db->height() - 1; const uint64_t top_height = m_db->height() - 1;
MGINFO("Recalculating difficulties from height " << start_height << " to height " << top_height); MGINFO("Recalculating difficulties from height " << start_height << " to height " << top_height);
uint8_t version = get_current_hard_fork_version();
uint64_t difficulty_blocks_count = version >= 11 ? DIFFICULTY_BLOCKS_COUNT_V3 : version <= 10 && version >= 8 ? DIFFICULTY_BLOCKS_COUNT_V2 : DIFFICULTY_BLOCKS_COUNT;
std::vector<uint64_t> timestamps; std::vector<uint64_t> timestamps;
std::vector<difficulty_type> difficulties; std::vector<difficulty_type> difficulties;
timestamps.reserve(DIFFICULTY_BLOCKS_COUNT + 1); timestamps.reserve(difficulty_blocks_count + 1);
difficulties.reserve(DIFFICULTY_BLOCKS_COUNT + 1); difficulties.reserve(difficulty_blocks_count + 1);
if (start_height > 1) if (start_height > 1)
{ {
for (uint64_t i = 0; i < DIFFICULTY_BLOCKS_COUNT; ++i) for (uint64_t i = 0; i < difficulty_blocks_count; ++i)
{ {
uint64_t height = start_height - 1 - i; uint64_t height = start_height - 1 - i;
if (height == 0) if (height == 0)
@ -1070,9 +1071,9 @@ size_t Blockchain::recalculate_difficulties(boost::optional<uint64_t> start_heig
timestamps.push_back(m_db->get_block_timestamp(height)); timestamps.push_back(m_db->get_block_timestamp(height));
difficulties.push_back(recalculated_cum_diff); difficulties.push_back(recalculated_cum_diff);
} }
if (timestamps.size() > DIFFICULTY_BLOCKS_COUNT) if (timestamps.size() > difficulty_blocks_count)
{ {
CHECK_AND_ASSERT_THROW_MES(timestamps.size() == DIFFICULTY_BLOCKS_COUNT + 1, "Wrong timestamps size: " << timestamps.size()); CHECK_AND_ASSERT_THROW_MES(timestamps.size() == difficulty_blocks_count + 1, "Wrong timestamps size: " << timestamps.size());
timestamps.erase(timestamps.begin()); timestamps.erase(timestamps.begin());
difficulties.erase(difficulties.begin()); difficulties.erase(difficulties.begin());
} }
@ -3937,15 +3938,18 @@ uint64_t Blockchain::get_adjusted_time(uint64_t height) const
{ {
LOG_PRINT_L3("Blockchain::" << __func__); LOG_PRINT_L3("Blockchain::" << __func__);
uint8_t version = get_current_hard_fork_version();
size_t blockchain_timestamp_check_window = version >= 10 ? BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW_V2 : BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW;
// if not enough blocks, no proper median yet, return current time // if not enough blocks, no proper median yet, return current time
if(height < BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW) if(height < blockchain_timestamp_check_window)
{ {
return static_cast<uint64_t>(time(NULL)); return static_cast<uint64_t>(time(NULL));
} }
std::vector<uint64_t> timestamps; std::vector<uint64_t> timestamps;
// need most recent 60 blocks, get index of first of those // need most recent 60 blocks, get index of first of those
size_t offset = height - BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW; size_t offset = height - blockchain_timestamp_check_window;
timestamps.reserve(height - offset); timestamps.reserve(height - offset);
for(;offset < height; ++offset) for(;offset < height; ++offset)
{ {
@ -3955,7 +3959,7 @@ uint64_t Blockchain::get_adjusted_time(uint64_t height) const
// project the median to match approximately when the block being validated will appear // project the median to match approximately when the block being validated will appear
// the median is calculated from a chunk of past blocks, so we use +1 to offset onto the current block // the median is calculated from a chunk of past blocks, so we use +1 to offset onto the current block
median_ts += (BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW + 1) * DIFFICULTY_TARGET_V2 / 2; median_ts += (blockchain_timestamp_check_window + 1) * DIFFICULTY_TARGET_V2 / 2;
// project the current block's time based on the previous block's time // project the current block's time based on the previous block's time
// we don't use the current block's time directly to mitigate timestamp manipulation // we don't use the current block's time directly to mitigate timestamp manipulation