package state import ( ethdb "github.com/ethereum/go-ethereum/ethdb" dbm "github.com/tendermint/tendermint/libs/db" ) // EthereumDB implements Ethereum's ethdb.Database and ethdb.Batch interfaces. // It will be used to facilitate persistence of codeHash => code mappings. type EthereumDB struct { CodeDB dbm.DB } // Put implements Ethereum's ethdb.Putter interface. It wraps the database // write operation supported by both batches and regular databases. func (edb *EthereumDB) Put(key []byte, value []byte) error { edb.CodeDB.Set(key, value) return nil } // Get implements Ethereum's ethdb.Database interface. It returns a value for a // given key. func (edb *EthereumDB) Get(key []byte) ([]byte, error) { return edb.CodeDB.Get(key), nil } // Has implements Ethereum's ethdb.Database interface. It returns a boolean // determining if the underlying database has the given key or not. func (edb *EthereumDB) Has(key []byte) (bool, error) { return edb.CodeDB.Has(key), nil } // Delete implements Ethereum's ethdb.Database interface. It removes a given // key from the underlying database. func (edb *EthereumDB) Delete(key []byte) error { edb.CodeDB.Delete(key) return nil } // Close implements Ethereum's ethdb.Database interface. It closes the // underlying database. func (edb *EthereumDB) Close() { edb.CodeDB.Close() } // NewBatch implements Ethereum's ethdb.Database interface. It returns a new // Batch object used for batch database operations. func (edb *EthereumDB) NewBatch() ethdb.Batch { return edb } // ValueSize implements Ethereum's ethdb.Database interface. It performs a // no-op. func (edb *EthereumDB) ValueSize() int { return 0 } // Write implements Ethereum's ethdb.Database interface. It performs a no-op. func (edb *EthereumDB) Write() error { return nil } // Reset implements Ethereum's ethdb.Database interface. It performs a no-op. func (edb *EthereumDB) Reset() { }