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log: on new valid header

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This commit is contained in:
James O'Beirne 2023-03-19 10:02:08 -04:00
parent e5ce857634
commit 2c3a90f663
1 changed files with 17 additions and 0 deletions
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17
src/validation.cpp
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@ -3832,6 +3832,23 @@ bool ChainstateManager::AcceptBlockHeader(const CBlockHeader& block, BlockValida
if (ppindex)
*ppindex = pindex;
// Since this is the earliest point at which we have determined that a
// header is both new and valid, log here.
//
// These messages are valuable for detecting potential selfish mining behavior;
// if multiple displacing headers are seen near simultaneously across many
// nodes in the network, this might be an indication of selfish mining. Having
// this log by default when not in IBD ensures broad availability of this data
// in case investigation is merited.
const auto msg = strprintf(
"Saw new header hash=%s height=%d", hash.ToString(), pindex->nHeight);
if (ActiveChainstate().IsInitialBlockDownload()) {
LogPrintLevel(BCLog::VALIDATION, BCLog::Level::Debug, "%s\n", msg);
} else {
LogPrintf("%s\n", msg);
}
return true;
}