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engine_v2: fix negative underflow in getBlockInfoByEpochNum (#1481)

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wgr523 2025-09-17 22:52:28 +08:00 committed by GitHub
parent b8e5baa978
commit 5a6d25ec08
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1 changed files with 7 additions and 1 deletions
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8
consensus/XDPoS/engines/engine_v2/utils.go
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@ -271,7 +271,13 @@ func (x *XDPoS_v2) binarySearchBlockByEpochNumber(chain consensus.ChainReader, t
} else { } else {
end = header.Number.Uint64() end = header.Number.Uint64()
// trick to shorten the search // trick to shorten the search
estStart := end - uint64(round)%x.config.Epoch estStart := uint64(0)
// if statement to avoid negative underflow
roundModEpoch := uint64(round) % x.config.Epoch
if end >= roundModEpoch {
estStart = end - roundModEpoch
}
if start < estStart { if start < estStart {
start = estStart start = estStart
} }