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shorten timestamp check window

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wowario 2023-01-31 23:23:19 +03:00
parent a0a90ada1a
commit aa7564806d
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GPG key ID: 793504B449C69220
2 changed files with 16 additions and 8 deletions
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1
src/cryptonote_config.h
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@ -50,6 +50,7 @@
#define CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT 60*60*2
#define CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE 4
#define BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW_V2 11
#define BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW 60
// MONEY_SUPPLY - total number coins to be generated

23
src/cryptonote_core/blockchain.cpp
View file

@ -1859,12 +1859,14 @@ bool Blockchain::get_miner_data(uint8_t& major_version, uint64_t& height, crypto
bool Blockchain::complete_timestamps_vector(uint64_t start_top_height, std::vector<uint64_t>& timestamps) const
{
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(timestamps.size() >= BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW)
if(timestamps.size() >= blockchain_timestamp_check_window)
return true;
CRITICAL_REGION_LOCAL(m_blockchain_lock);
size_t need_elements = BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW - timestamps.size();
size_t need_elements = blockchain_timestamp_check_window - timestamps.size();
CHECK_AND_ASSERT_MES(start_top_height < m_db->height(), false, "internal error: passed start_height not < " << " m_db->height() -- " << start_top_height << " >= " << m_db->height());
size_t stop_offset = start_top_height > need_elements ? start_top_height - need_elements : 0;
timestamps.reserve(timestamps.size() + start_top_height - stop_offset);
@ -4008,14 +4010,16 @@ uint64_t Blockchain::get_adjusted_time(uint64_t height) const
LOG_PRINT_L3("Blockchain::" << __func__);
// if not enough blocks, no proper median yet, return current time
if(height < BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW)
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(height < blockchain_timestamp_check_window)
{
return static_cast<uint64_t>(time(NULL));
}
std::vector<uint64_t> timestamps;
// 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);
for(;offset < height; ++offset)
{
@ -4025,7 +4029,7 @@ uint64_t Blockchain::get_adjusted_time(uint64_t height) const
// 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
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
// we don't use the current block's time directly to mitigate timestamp manipulation
@ -4044,7 +4048,9 @@ bool Blockchain::check_block_timestamp(std::vector<uint64_t>& timestamps, const
if(b.timestamp < median_ts)
{
MERROR_VER("Timestamp of block with id: " << get_block_hash(b) << ", " << b.timestamp << ", less than median of last " << BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW << " blocks, " << median_ts);
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;
MERROR_VER("Timestamp of block with id: " << get_block_hash(b) << ", " << b.timestamp << ", less than median of last " << blockchain_timestamp_check_window << " blocks, " << median_ts);
return false;
}
@ -4063,6 +4069,7 @@ bool Blockchain::check_block_timestamp(const block& b, uint64_t& median_ts) cons
LOG_PRINT_L3("Blockchain::" << __func__);
uint8_t version = get_current_hard_fork_version();
uint64_t cryptonote_block_future_time_limit = version >= 8 ? CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT_V2 : CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT;
size_t blockchain_timestamp_check_window = version >= 10 ? BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW_V2 : BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW;
if(b.timestamp > (uint64_t)time(NULL) + cryptonote_block_future_time_limit)
{
MERROR_VER("Timestamp of block with id: " << get_block_hash(b) << ", " << b.timestamp << ", bigger than local time + 10 minutes");
@ -4072,7 +4079,7 @@ bool Blockchain::check_block_timestamp(const block& b, uint64_t& median_ts) cons
const auto h = m_db->height();
// if not enough blocks, no proper median yet, return true
if(h < BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW)
if(h < blockchain_timestamp_check_window)
{
return true;
}
@ -4080,7 +4087,7 @@ bool Blockchain::check_block_timestamp(const block& b, uint64_t& median_ts) cons
std::vector<uint64_t> timestamps;
// need most recent 60 blocks, get index of first of those
size_t offset = h - BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW;
size_t offset = h - blockchain_timestamp_check_window;
timestamps.reserve(h - offset);
for(;offset < h; ++offset)
{