github.com/intfoundation/intchain@v0.0.0-20220727031208-4316ad31ca73/core/rawdb/database.go (about) 1 // Copyright 2018 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package rawdb 18 19 import ( 20 "github.com/intfoundation/intchain/intdb" 21 "github.com/intfoundation/intchain/intdb/leveldb" 22 "github.com/intfoundation/intchain/intdb/memorydb" 23 ) 24 25 // NewDatabase creates a high level database on top of a given key-value data 26 // store without a freezer moving immutable chain segments into cold storage. 27 func NewDatabase(db intdb.KeyValueStore) intdb.Database { 28 return db 29 } 30 31 // NewMemoryDatabase creates an ephemeral in-memory key-value database without a 32 // freezer moving immutable chain segments into cold storage. 33 func NewMemoryDatabase() intdb.Database { 34 return NewDatabase(memorydb.New()) 35 } 36 37 // NewMemoryDatabaseWithCap creates an ephemeral in-memory key-value database with 38 // an initial starting capacity, but without a freezer moving immutable chain 39 // segments into cold storage. 40 func NewMemoryDatabaseWithCap(size int) intdb.Database { 41 return NewDatabase(memorydb.NewWithCap(size)) 42 } 43 44 // NewLevelDBDatabase creates a persistent key-value database without a freezer 45 // moving immutable chain segments into cold storage. 46 func NewLevelDBDatabase(file string, cache int, handles int, namespace string) (intdb.Database, error) { 47 db, err := leveldb.New(file, cache, handles, namespace) 48 if err != nil { 49 return nil, err 50 } 51 return NewDatabase(db), nil 52 }