SMTPath is the whole path of SMT.

SMTPathNode represent a node in the SMT Path, all hash is saved by the present of zktype.Hash.

StateAccount is the represent of StateAccount in L2 circuit Notice in L2 we have different hash scheme against StateAccount.MarshalByte.

StateStorage is the represent of a stored key-value pair for specified account.

StorageTrace record the updating on state trie and (if changed) account trie represent by the [before, after] updating of SMTPath amont tries and Account.