NewDatabase initializes the trie database with default settings, note the legacy hash-based scheme is used by default.

NewStateSet initializes an empty state set.

HashDefaults represents a config for using hash-based scheme with default settings.

VerkleDefaults represents a config for holding verkle trie data using path-based scheme with default settings.

Config defines all necessary options for database.

Database is the wrapper of the underlying backend which is shared by different types of node backend as an entrypoint.

StateSet represents a collection of mutated states during a state transition.