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core: stop rewinding if chain is gapped or genesis is reached

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This commit is contained in:
Gary Rong 2024-03-12 10:07:20 +08:00
parent 3784c6caee
commit ad7ac99e70
1 changed files with 15 additions and 2 deletions
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17
core/blockchain.go
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@ -662,7 +662,7 @@ func (bc *BlockChain) rewindHashHead(root common.Hash) (*types.Header, uint64) {
if !bc.HasState(head.Root) {
// If search limit is reached, return the genesis block as
// the new chain head.
if head.Number.Uint64() < limit {
if head.Number.Uint64() <= limit {
log.Info("Rewinding limit reached, resetting to genesis", "number", head.Number, "hash", head.Hash(), "limit", limit)
return bc.genesisBlock.Header(), rootNumber
}
@ -744,7 +744,20 @@ func (bc *BlockChain) rewindPathHead(root common.Hash) (*types.Header, uint64) {
log.Info("Pivot block reached, resetting to genesis", "number", head.Number, "hash", head.Hash())
return bc.genesisBlock.Header(), rootNumber
}
head = bc.GetHeader(head.ParentHash, head.Number.Uint64()-1) // Keep rewinding
// If the chain is gapped in the middle, return the genesis
// block as the new chain head
parent := bc.GetHeader(head.ParentHash, head.Number.Uint64()-1) // Keep rewinding
if parent == nil {
log.Error("Missing block in the middle, resetting to genesis", "number", head.Number.Uint64()-1, "hash", head.ParentHash)
return bc.genesisBlock.Header(), rootNumber
}
head = parent
// If the genesis block is reached, stop searching.
if head.Number.Uint64() == 0 {
log.Info("Genesis block reached", "number", head.Number, "hash", head.Hash())
return head, rootNumber
}
}
// Recover if the target state if it's not available yet.
if !bc.HasState(head.Root) {