diff --git a/state/statedb.go b/state/statedb.go
index 8c39707e..f603401d 100644
--- a/state/statedb.go
+++ b/state/statedb.go
@@ -306,7 +306,10 @@ func (csdb *CommitStateDB) StorageTrie(addr ethcmn.Address) ethstate.Trie {
 // Persistance
 // ----------------------------------------------------------------------------
 
-// TODO: Commit writes the state ...
+// Commit writes the state to the appropriate KVStores. For each state object
+// in the cache, it will either be removed, or have it's code set and/or it's
+// state (storage) updated. In addition, the state object (account) itself will
+// be written. Finally, the root hash (version) will be returned.
 func (csdb *CommitStateDB) Commit(deleteEmptyObjects bool) (root ethcmn.Hash, err error) {
 	defer csdb.clearJournalAndRefund()