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cmd/utils: add comments

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This commit is contained in:
Gary Rong 2025-09-18 14:58:13 +08:00
parent 84883ffef7
commit 252ad9bf8e
1 changed files with 8 additions and 0 deletions
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8
cmd/utils/cmd.go
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@ -568,6 +568,9 @@ func ExportPreimages(db ethdb.Database, fn string) error {
return nil
}
// StateIterator is a temporary structure for traversing state in order. It serves
// as an aggregator for both path scheme and hash scheme implementations and should
// be removed once the hash scheme is fully deprecated.
type StateIterator struct {
scheme string
root common.Hash
@ -575,6 +578,7 @@ type StateIterator struct {
snapshots *snapshot.Tree
}
// NewStateIterator constructs the state iterator with the specific root.
func NewStateIterator(triedb *triedb.Database, db ethdb.Database, root common.Hash) (*StateIterator, error) {
if triedb.Scheme() == rawdb.PathScheme {
return &StateIterator{
@ -601,6 +605,8 @@ func NewStateIterator(triedb *triedb.Database, db ethdb.Database, root common.Ha
}, nil
}
// AccountIterator creates a new account iterator for the specified root hash and
// seeks to a starting account hash.
func (it *StateIterator) AccountIterator(root common.Hash, start common.Hash) (snapshot.AccountIterator, error) {
if it.scheme == rawdb.PathScheme {
return it.triedb.AccountIterator(root, start)
@ -608,6 +614,8 @@ func (it *StateIterator) AccountIterator(root common.Hash, start common.Hash) (s
return it.snapshots.AccountIterator(root, start)
}
// StorageIterator creates a new storage iterator for the specified root hash and
// account. The iterator will be moved to the specific start position.
func (it *StateIterator) StorageIterator(root common.Hash, accountHash common.Hash, start common.Hash) (snapshot.StorageIterator, error) {
if it.scheme == rawdb.PathScheme {
return it.triedb.StorageIterator(root, accountHash, start)