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Merge 389cf32aca into merged_master (Bitcoin PR bitcoin/bitcoin#30604)

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ivanlele 2026-03-12 13:33:16 +00:00
commit d2e2c989ec
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4 changed files with 28 additions and 3 deletions
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17
src/validation.cpp
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@ -114,6 +114,21 @@ const std::vector<std::string> CHECKLEVEL_DOC {
* */
static constexpr int PRUNE_LOCK_BUFFER{10};
/**
* Maximum number of seconds that the timestamp of the first
* block of a difficulty adjustment period is allowed to
* be earlier than the last block of the previous period (BIP94).
*/
static constexpr int64_t MAX_TIMEWARP{MAX_FUTURE_BLOCK_TIME};
/**
* If the timestamp of the last block in a difficulty period is set
* MAX_FUTURE_BLOCK_TIME seconds in the future, an honest miner should
* be able to mine the first block using the current time. This is not
* a consensus rule, but changing MAX_TIMEWARP should be done with caution.
*/
static_assert(MAX_FUTURE_BLOCK_TIME <= MAX_TIMEWARP);
GlobalMutex g_best_block_mutex;
std::condition_variable g_best_block_cv;
uint256 g_best_block;
@ -4774,7 +4789,7 @@ static bool ContextualCheckBlockHeader(const CBlockHeader& block, BlockValidatio
// Check timestamp for the first block of each difficulty adjustment
// interval, except the genesis block.
if (nHeight % consensusParams.DifficultyAdjustmentInterval() == 0) {
if (block.GetBlockTime() < pindexPrev->GetBlockTime() - 60 * 60 * 2) {
if (block.GetBlockTime() < pindexPrev->GetBlockTime() - MAX_TIMEWARP) {
return state.Invalid(BlockValidationResult::BLOCK_INVALID_HEADER, "time-timewarp-attack", "block's timestamp is too early on diff adjustment block");
}
}