core/state: access trie through Database interface, track errors (#14589)

With this commit, core/state's access to the underlying key/value database is
mediated through an interface. Database errors are tracked in StateDB and
returned by CommitTo or the new Error method.

Motivation for this change: We can remove the light client's duplicated copy of
core/state. The light client now supports node iteration, so tracing and storage
enumeration can work with the light client (not implemented in this commit).

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/block_test_util.go b/tests/block_test_util.go
index b9678a77b..24d4672b6 100644
--- a/tests/block_test_util.go
+++ b/tests/block_test_util.go
@@ -204,7 +204,7 @@ func runBlockTest(homesteadBlock, daoForkBlock, gasPriceFork *big.Int, test *Blo
 // InsertPreState populates the given database with the genesis
 // accounts defined by the test.
 func (t *BlockTest) InsertPreState(db ethdb.Database) (*state.StateDB, error) {
-	statedb, err := state.New(common.Hash{}, db)
+	statedb, err := state.New(common.Hash{}, state.NewDatabase(db))
 	if err != nil {
 		return nil, err
 	}
@@ -232,7 +232,7 @@ func (t *BlockTest) InsertPreState(db ethdb.Database) (*state.StateDB, error) {
 		}
 	}
 
-	root, err := statedb.Commit(false)
+	root, err := statedb.CommitTo(db, false)
 	if err != nil {
 		return nil, fmt.Errorf("error writing state: %v", err)
 	}