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core: extend code comment

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This commit is contained in:
Gary Rong 2024-03-11 23:28:30 +08:00
parent e3884f146b
commit 3784c6caee
1 changed files with 4 additions and 2 deletions
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6
core/blockchain.go
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@ -760,8 +760,10 @@ func (bc *BlockChain) rewindPathHead(root common.Hash) (*types.Header, uint64) {
// block as the new head block.
//
// If the given root is not empty, then the rewind should attempt to pass the specified
// state root and return the associated block number as well. If the root is deemed
// impossible to pass, 0 is returned.
// state root and return the associated block number as well. If the root, typically
// representing the state corresponding to snapshot disk layer, is deemed impassable,
// then block number zero is returned, indicating that snapshot recovery is disabled
// and the whole snapshot should be auto-generated in case of head mismatch.
func (bc *BlockChain) rewindHead(root common.Hash) (*types.Header, uint64) {
if bc.triedb.Scheme() == rawdb.PathScheme {
return bc.rewindPathHead(root)