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Fix Overflow Bugs Introduced (#7579)

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Nishant Das 2020-10-20 14:18:03 +08:00 committed by GitHub
parent 816eb94adf
commit 81b553a00a
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1 changed files with 4 additions and 5 deletions
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9
beacon-chain/powchain/service.go
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@ -649,7 +649,6 @@ func (s *Service) initPOWService() {
s.retryETH1Node(err)
continue
}
s.cacheHeadersForEth1DataVote(ctx)
s.latestEth1Data.BlockHeight = header.Number.Uint64()
s.latestEth1Data.BlockHash = header.Hash().Bytes()
@ -660,6 +659,8 @@ func (s *Service) initPOWService() {
s.retryETH1Node(err)
continue
}
// Cache eth1 headers from our voting period.
s.cacheHeadersForEth1DataVote(ctx)
return
}
}
@ -739,12 +740,10 @@ func (s *Service) cacheHeadersForEth1DataVote(ctx context.Context) {
log.Errorf("Unable to fetch height of follow block: %v", err)
}
var start uint64
// We fetch twice the number of headers just to be safe.
if end-2*blocksPerVotingPeriod >= 0 {
start := uint64(0)
if end >= 2*blocksPerVotingPeriod {
start = end - 2*blocksPerVotingPeriod
} else {
start = 0
}
// We call batchRequestHeaders for its header caching side-effect, so we don't need the return value.
_, err = s.batchRequestHeaders(start, end)