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avoid using block override #1856

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Merged
merged 1 commit into from
Dec 17, 2023
Merged

avoid using block override #1856

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6 changes: 6 additions & 0 deletions core/cvm.go
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,11 @@ func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash
var cache []common.Hash

return func(n uint64) common.Hash {
if ref.Number.Uint64() <= n {
// This situation can happen if we're doing tracing and using
// block overrides.
return common.Hash{}
}
// If there's no hash cache yet, make one
if len(cache) == 0 {
cache = append(cache, ref.ParentHash)
Expand All @@ -89,6 +94,7 @@ func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash
// No luck in the cache, but we can start iterating from the last element we already know
lastKnownHash := cache[len(cache)-1]
lastKnownNumber := ref.Number.Uint64() - uint64(len(cache))

for {
header := chain.GetHeader(lastKnownHash, lastKnownNumber)
if header == nil {
Expand Down