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eth/downloader/whitelist: skip future chain validation #796

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Merged
manav2401 merged 2 commits into from
Mar 31, 2023
Merged

eth/downloader/whitelist: skip future chain validation #796

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eth/downloader/whitelist: skip future chain validation
manav2401 Mar 28, 2023
f8c3dd9
eth/downloader/whitelist: fix tests for future chain import
manav2401 Mar 29, 2023
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18 changes: 10 additions & 8 deletions eth/downloader/whitelist/service.go
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Original file line number Diff line number Diff line change
Expand Up @@ -100,18 +100,20 @@ func (w *Service) IsValidChain(currentHeader *types.Header, chain []*types.Heade
}

// Split the chain into past and future chain
pastChain, futureChain := splitChain(current, chain)
pastChain, _ := splitChain(current, chain)

// Note: Do not act on future chain and allow importing all kinds of future chains.

// Add an offset to future chain if it's not in continuity
offset := 0
if len(futureChain) != 0 {
offset += int(futureChain[0].Number.Uint64()-currentHeader.Number.Uint64()) - 1
}
// offset := 0
// if len(futureChain) != 0 {
// offset += int(futureChain[0].Number.Uint64()-currentHeader.Number.Uint64()) - 1
// }

// Don't accept future chain of unacceptable length (from current block)
if len(futureChain)+offset > int(w.checkpointInterval) {
return false, ErrLongFutureChain
}
// if len(futureChain)+offset > int(w.checkpointInterval) {
// return false, ErrLongFutureChain
// }

// Iterate over the chain and validate against the last checkpoint
// It will handle all cases where the incoming chain has atleast one checkpoint
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