feat:: support has state and get version interface

Author: joey0612

core/blockchain_reader.go

@@ -348,11 +348,7 @@ func (bc *BlockChain) HasState(hash common.Hash) bool {
 			return true
 		}
 	}
-	block := bc.GetBlockByHash(hash)
-	if block == nil {
-		return false
-	}
-	return bc.stateCache.HasState(block.NumberU64(), hash)
+	return bc.stateCache.HasState(hash)
 }
 
 // HasBlockAndState checks if a block and associated state trie is fully present
@@ -400,7 +396,19 @@ func (bc *BlockChain) State() (*state.StateDB, error) {
 // StateAt returns a new mutable state based on a particular point in time.
 func (bc *BlockChain) StateAt(root common.Hash) (*state.StateDB, error) {
 	// new state db with no need commit mode
-	stateDb, err := state.New(root, state.NewDatabaseWithNodeDB(bc.db, bc.triedb, false), bc.snaps)
+	var (
+		blockNumber int64
+		err         error
+	)
+	if bc.triedb.Scheme() == rawdb.VersionScheme {
+		blockNumber, err = bc.triedb.VersaDB().GetVersionByRootHash(root)
+		if err != nil {
+			return nil, err
+		}
+	}
+	stateCache := state.NewDatabaseWithNodeDB(bc.db, bc.triedb, false)
+	stateCache.SetVersion(blockNumber + 1)
+	stateDb, err := state.New(root, stateCache, bc.snaps)
 	if err != nil {
 		return nil, err
 	}

core/state/caching_versa_db.go

@@ -249,8 +249,8 @@ func (cv *cachingVersaDB) Reset() {
 	cv.root = common.Hash{}
 }
 
-func (cv *cachingVersaDB) HasState(version uint64, root common.Hash) bool {
-	return cv.versionDB.HasState(int64(version), root)
+func (cv *cachingVersaDB) HasState(root common.Hash) bool {
+	return cv.versionDB.HasState(root)
 }
 
 func (cv *cachingVersaDB) HasTreeExpired(tr Trie) bool {

core/state/database.go

@@ -89,7 +89,7 @@ type Database interface {
 	// HasTreeExpired used for caching versa db, whether the state where the opened tree resides has been closed
 	HasTreeExpired(tr Trie) bool
 
-	HasState(version uint64, root common.Hash) bool
+	HasState(root common.Hash) bool
 
 	// NoTries returns whether the database has tries storage.
 	NoTries() bool
@@ -365,7 +365,7 @@ func (db *cachingDB) TrieDB() *triedb.Database {
 	return db.triedb
 }
 
-func (db *cachingDB) HasState(_ uint64, root common.Hash) bool {
+func (db *cachingDB) HasState(root common.Hash) bool {
 	_, err := db.OpenTrie(root)
 	return err == nil
 }