Golang ethdb.NewLDBDatabase函數代碼示例

func GetChain(ctx *cli.Context) (*core.ChainManager, common.Database, common.Database) {
	dataDir := ctx.GlobalString(DataDirFlag.Name)

	blockDb, err := ethdb.NewLDBDatabase(path.Join(dataDir, "blockchain"))
	if err != nil {
		Fatalf("Could not open database: %v", err)
	}

	stateDb, err := ethdb.NewLDBDatabase(path.Join(dataDir, "state"))
	if err != nil {
		Fatalf("Could not open database: %v", err)
	}

	extraDb, err := ethdb.NewLDBDatabase(path.Join(dataDir, "extra"))
	if err != nil {
		Fatalf("Could not open database: %v", err)
	}

	eventMux := new(event.TypeMux)
	chainManager := core.NewChainManager(blockDb, stateDb, eventMux)
	pow := ethash.New()
	txPool := core.NewTxPool(eventMux, chainManager.State, chainManager.GasLimit)
	blockProcessor := core.NewBlockProcessor(stateDb, extraDb, pow, txPool, chainManager, eventMux)
	chainManager.SetProcessor(blockProcessor)

	return chainManager, blockDb, stateDb
}

// MakeChain creates a chain manager from set command line flags.
func MakeChain(ctx *cli.Context) (chain *core.ChainManager, blockDB, stateDB, extraDB common.Database) {
	dd := ctx.GlobalString(DataDirFlag.Name)
	var err error
	if blockDB, err = ethdb.NewLDBDatabase(filepath.Join(dd, "blockchain")); err != nil {
		Fatalf("Could not open database: %v", err)
	}
	if stateDB, err = ethdb.NewLDBDatabase(filepath.Join(dd, "state")); err != nil {
		Fatalf("Could not open database: %v", err)
	}
	if extraDB, err = ethdb.NewLDBDatabase(filepath.Join(dd, "extra")); err != nil {
		Fatalf("Could not open database: %v", err)
	}

	eventMux := new(event.TypeMux)
	pow := ethash.New()
	genesis := core.GenesisBlock(uint64(ctx.GlobalInt(GenesisNonceFlag.Name)), blockDB)
	chain, err = core.NewChainManager(genesis, blockDB, stateDB, pow, eventMux)
	if err != nil {
		Fatalf("Could not start chainmanager: %v", err)
	}

	proc := core.NewBlockProcessor(stateDB, extraDB, pow, chain, eventMux)
	chain.SetProcessor(proc)
	return chain, blockDB, stateDB, extraDB
}

// MakeChain creates a chain manager from set command line flags.
func MakeChain(ctx *cli.Context) (chain *core.BlockChain, chainDb ethdb.Database) {
	datadir := MustDataDir(ctx)
	cache := ctx.GlobalInt(CacheFlag.Name)

	var err error
	if chainDb, err = ethdb.NewLDBDatabase(filepath.Join(datadir, "chaindata"), cache); err != nil {
		Fatalf("Could not open database: %v", err)
	}
	if ctx.GlobalBool(OlympicFlag.Name) {
		_, err := core.WriteTestNetGenesisBlock(chainDb, 42)
		if err != nil {
			glog.Fatalln(err)
		}
	}

	eventMux := new(event.TypeMux)
	pow := ethash.New()
	//genesis := core.GenesisBlock(uint64(ctx.GlobalInt(GenesisNonceFlag.Name)), blockDB)
	chain, err = core.NewBlockChain(chainDb, pow, eventMux)
	if err != nil {
		Fatalf("Could not start chainmanager: %v", err)
	}

	proc := core.NewBlockProcessor(chainDb, pow, chain, eventMux)
	chain.SetProcessor(proc)
	return chain, chainDb
}

func benchInsertChain(b *testing.B, disk bool, gen func(int, *BlockGen)) {
	// Create the database in memory or in a temporary directory.
	var db common.Database
	if !disk {
		db, _ = ethdb.NewMemDatabase()
	} else {
		dir, err := ioutil.TempDir("", "eth-core-bench")
		if err != nil {
			b.Fatalf("cannot create temporary directory: %v", err)
		}
		defer os.RemoveAll(dir)
		db, err = ethdb.NewLDBDatabase(dir, 0)
		if err != nil {
			b.Fatalf("cannot create temporary database: %v", err)
		}
		defer db.Close()
	}

	// Generate a chain of b.N blocks using the supplied block
	// generator function.
	genesis := WriteGenesisBlockForTesting(db, benchRootAddr, benchRootFunds)
	chain := GenerateChain(genesis, db, b.N, gen)

	// Time the insertion of the new chain.
	// State and blocks are stored in the same DB.
	evmux := new(event.TypeMux)
	chainman, _ := NewChainManager(db, db, db, FakePow{}, evmux)
	chainman.SetProcessor(NewBlockProcessor(db, db, FakePow{}, chainman, evmux))
	defer chainman.Stop()
	b.ReportAllocs()
	b.ResetTimer()
	if i, err := chainman.InsertChain(chain); err != nil {
		b.Fatalf("insert error (block %d): %v\n", i, err)
	}
}

func blockRecovery(ctx *cli.Context) {
	utils.CheckLegalese(ctx.GlobalString(utils.DataDirFlag.Name))

	arg := ctx.Args().First()
	if len(ctx.Args()) < 1 && len(arg) > 0 {
		glog.Fatal("recover requires block number or hash")
	}

	cfg := utils.MakeEthConfig(ClientIdentifier, nodeNameVersion, ctx)
	utils.CheckLegalese(cfg.DataDir)

	blockDb, err := ethdb.NewLDBDatabase(filepath.Join(cfg.DataDir, "blockchain"), cfg.DatabaseCache)
	if err != nil {
		glog.Fatalln("could not open db:", err)
	}

	var block *types.Block
	if arg[0] == '#' {
		block = core.GetBlockByNumber(blockDb, common.String2Big(arg[1:]).Uint64())
	} else {
		block = core.GetBlockByHash(blockDb, common.HexToHash(arg))
	}

	if block == nil {
		glog.Fatalln("block not found. Recovery failed")
	}

	err = core.WriteHead(blockDb, block)
	if err != nil {
		glog.Fatalln("block write err", err)
	}
	glog.Infof("Recovery succesful. New HEAD %x\n", block.Hash())
}

func tempDB() (string, Database) {
	dir, err := ioutil.TempDir("", "trie-bench")
	if err != nil {
		panic(fmt.Sprintf("can't create temporary directory: %v", err))
	}
	db, err := ethdb.NewLDBDatabase(dir, 256, 0)
	if err != nil {
		panic(fmt.Sprintf("can't create temporary database: %v", err))
	}
	return dir, db
}

// MakeChainDatabase open an LevelDB using the flags passed to the client and will hard crash if it fails.
func MakeChainDatabase(ctx *cli.Context) ethdb.Database {
	var (
		datadir = MustMakeDataDir(ctx)
		cache   = ctx.GlobalInt(CacheFlag.Name)
		handles = MakeDatabaseHandles()
	)

	chainDb, err := ethdb.NewLDBDatabase(filepath.Join(datadir, "chaindata"), cache, handles)
	if err != nil {
		Fatalf("Could not open database: %v", err)
	}
	return chainDb
}

// Create GUI, but doesn't start it
func NewWindow(ethereum *eth.Ethereum) *Gui {
	db, err := ethdb.NewLDBDatabase(path.Join(ethereum.DataDir, "tx_database"))
	if err != nil {
		panic(err)
	}

	xeth := xeth.New(ethereum, nil)
	gui := &Gui{eth: ethereum,
		txDb:          db,
		xeth:          xeth,
		open:          false,
		plugins:       make(map[string]plugin),
		serviceEvents: make(chan ServEv, 1),
	}
	data, _ := ioutil.ReadFile(path.Join(ethereum.DataDir, "plugins.json"))
	json.Unmarshal(data, &gui.plugins)

	return gui
}

// initGenesis will initialise the given JSON format genesis file and writes it as
// the zero'd block (i.e. genesis) or will fail hard if it can't succeed.
func initGenesis(ctx *cli.Context) {
	genesisPath := ctx.Args().First()
	if len(genesisPath) == 0 {
		utils.Fatalf("must supply path to genesis JSON file")
	}

	chainDb, err := ethdb.NewLDBDatabase(filepath.Join(utils.MustMakeDataDir(ctx), "chaindata"), 0, 0)
	if err != nil {
		utils.Fatalf("could not open database: %v", err)
	}

	genesisFile, err := os.Open(genesisPath)
	if err != nil {
		utils.Fatalf("failed to read genesis file: %v", err)
	}

	block, err := core.WriteGenesisBlock(chainDb, genesisFile)
	if err != nil {
		utils.Fatalf("failed to write genesis block: %v", err)
	}
	glog.V(logger.Info).Infof("successfully wrote genesis block and/or chain rule set: %x", block.Hash())
}

func New(config *Config) (*Ethereum, error) {
	logger.New(config.DataDir, config.LogFile, config.Verbosity)

	// Let the database take 3/4 of the max open files (TODO figure out a way to get the actual limit of the open files)
	const dbCount = 3
	ethdb.OpenFileLimit = 128 / (dbCount + 1)

	newdb := config.NewDB
	if newdb == nil {
		newdb = func(path string) (ethdb.Database, error) { return ethdb.NewLDBDatabase(path, config.DatabaseCache) }
	}

	// Open the chain database and perform any upgrades needed
	chainDb, err := newdb(filepath.Join(config.DataDir, "chaindata"))
	if err != nil {
		if errno, ok := err.(syscall.Errno); ok && datadirInUseErrnos[uint(errno)] {
			err = fmt.Errorf("%v (check if another instance of geth is already running with the same data directory '%s')", err, config.DataDir)
		}
		return nil, fmt.Errorf("blockchain db err: %v", err)
	}
	if db, ok := chainDb.(*ethdb.LDBDatabase); ok {
		db.Meter("eth/db/chaindata/")
	}
	if err := upgradeChainDatabase(chainDb); err != nil {
		return nil, err
	}
	if err := addMipmapBloomBins(chainDb); err != nil {
		return nil, err
	}

	dappDb, err := newdb(filepath.Join(config.DataDir, "dapp"))
	if err != nil {
		if errno, ok := err.(syscall.Errno); ok && datadirInUseErrnos[uint(errno)] {
			err = fmt.Errorf("%v (check if another instance of geth is already running with the same data directory '%s')", err, config.DataDir)
		}
		return nil, fmt.Errorf("dapp db err: %v", err)
	}
	if db, ok := dappDb.(*ethdb.LDBDatabase); ok {
		db.Meter("eth/db/dapp/")
	}

	nodeDb := filepath.Join(config.DataDir, "nodes")
	glog.V(logger.Info).Infof("Protocol Versions: %v, Network Id: %v", ProtocolVersions, config.NetworkId)

	if len(config.GenesisFile) > 0 {
		fr, err := os.Open(config.GenesisFile)
		if err != nil {
			return nil, err
		}

		block, err := core.WriteGenesisBlock(chainDb, fr)
		if err != nil {
			return nil, err
		}
		glog.V(logger.Info).Infof("Successfully wrote genesis block. New genesis hash = %x\n", block.Hash())
	}

	// different modes
	switch {
	case config.Olympic:
		glog.V(logger.Error).Infoln("Starting Olympic network")
		fallthrough
	case config.DevMode:
		_, err := core.WriteOlympicGenesisBlock(chainDb, 42)
		if err != nil {
			return nil, err
		}
	case config.TestNet:
		state.StartingNonce = 1048576 // (2**20)
		_, err := core.WriteTestNetGenesisBlock(chainDb, 0x6d6f7264656e)
		if err != nil {
			return nil, err
		}
	}
	// This is for testing only.
	if config.GenesisBlock != nil {
		core.WriteTd(chainDb, config.GenesisBlock.Hash(), config.GenesisBlock.Difficulty())
		core.WriteBlock(chainDb, config.GenesisBlock)
		core.WriteCanonicalHash(chainDb, config.GenesisBlock.Hash(), config.GenesisBlock.NumberU64())
		core.WriteHeadBlockHash(chainDb, config.GenesisBlock.Hash())
	}

	if !config.SkipBcVersionCheck {
		b, _ := chainDb.Get([]byte("BlockchainVersion"))
		bcVersion := int(common.NewValue(b).Uint())
		if bcVersion != config.BlockChainVersion && bcVersion != 0 {
			return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run geth upgradedb.\n", bcVersion, config.BlockChainVersion)
		}
		saveBlockchainVersion(chainDb, config.BlockChainVersion)
	}
	glog.V(logger.Info).Infof("Blockchain DB Version: %d", config.BlockChainVersion)

	eth := &Ethereum{
		shutdownChan:            make(chan bool),
		chainDb:                 chainDb,
		dappDb:                  dappDb,
		eventMux:                &event.TypeMux{},
		accountManager:          config.AccountManager,
		DataDir:                 config.DataDir,
		etherbase:               config.Etherbase,
//.........這裏部分代碼省略.........

func testDAOForkBlockNewChain(t *testing.T, testnet bool, genesis string, votes [][2]bool, expectBlock *big.Int, expectVote bool) {
	// Create a temporary data directory to use and inspect later
	datadir := tmpdir(t)
	defer os.RemoveAll(datadir)

	// Start a Geth instance with the requested flags set and immediately terminate
	if genesis != "" {
		json := filepath.Join(datadir, "genesis.json")
		if err := ioutil.WriteFile(json, []byte(genesis), 0600); err != nil {
			t.Fatalf("failed to write genesis file: %v", err)
		}
		runGeth(t, "--datadir", datadir, "init", json).cmd.Wait()
	}
	for _, vote := range votes {
		args := []string{"--port", "0", "--maxpeers", "0", "--nodiscover", "--nat", "none", "--ipcdisable", "--datadir", datadir}
		if testnet {
			args = append(args, "--testnet")
		}
		if vote[0] {
			args = append(args, "--support-dao-fork")
		}
		if vote[1] {
			args = append(args, "--oppose-dao-fork")
		}
		geth := runGeth(t, append(args, []string{"--exec", "2+2", "console"}...)...)
		geth.cmd.Wait()
	}
	// Retrieve the DAO config flag from the database
	path := filepath.Join(datadir, "chaindata")
	if testnet && genesis == "" {
		path = filepath.Join(datadir, "testnet", "chaindata")
	}
	db, err := ethdb.NewLDBDatabase(path, 0, 0)
	if err != nil {
		t.Fatalf("failed to open test database: %v", err)
	}
	defer db.Close()

	genesisHash := common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")
	if testnet {
		genesisHash = common.HexToHash("0x0cd786a2425d16f152c658316c423e6ce1181e15c3295826d7c9904cba9ce303")
	}
	if genesis != "" {
		genesisHash = daoGenesisHash
	}
	config, err := core.GetChainConfig(db, genesisHash)
	if err != nil {
		t.Fatalf("failed to retrieve chain config: %v", err)
	}
	// Validate the DAO hard-fork block number against the expected value
	if config.DAOForkBlock == nil {
		if expectBlock != nil {
			t.Errorf("dao hard-fork block mismatch: have nil, want %v", expectBlock)
		}
	} else if expectBlock == nil {
		t.Errorf("dao hard-fork block mismatch: have %v, want nil", config.DAOForkBlock)
	} else if config.DAOForkBlock.Cmp(expectBlock) != 0 {
		t.Errorf("dao hard-fork block mismatch: have %v, want %v", config.DAOForkBlock, expectBlock)
	}
	if config.DAOForkSupport != expectVote {
		t.Errorf("dao hard-fork support mismatch: have %v, want %v", config.DAOForkSupport, expectVote)
	}
}

func New(config *Config) (*Ethereum, error) {
	// Bootstrap database
	logger.New(config.DataDir, config.LogFile, config.Verbosity)
	if len(config.LogJSON) > 0 {
		logger.NewJSONsystem(config.DataDir, config.LogJSON)
	}

	// Let the database take 3/4 of the max open files (TODO figure out a way to get the actual limit of the open files)
	const dbCount = 3
	ethdb.OpenFileLimit = 128 / (dbCount + 1)

	newdb := config.NewDB
	if newdb == nil {
		newdb = func(path string) (common.Database, error) { return ethdb.NewLDBDatabase(path) }
	}
	blockDb, err := newdb(filepath.Join(config.DataDir, "blockchain"))
	if err != nil {
		return nil, fmt.Errorf("blockchain db err: %v", err)
	}
	if db, ok := blockDb.(*ethdb.LDBDatabase); ok {
		db.GetTimer = metrics.NewTimer("eth/db/block/user/gets")
		db.PutTimer = metrics.NewTimer("eth/db/block/user/puts")
		db.MissMeter = metrics.NewMeter("eth/db/block/user/misses")
		db.ReadMeter = metrics.NewMeter("eth/db/block/user/reads")
		db.WriteMeter = metrics.NewMeter("eth/db/block/user/writes")
		db.CompTimeMeter = metrics.NewMeter("eth/db/block/compact/time")
		db.CompReadMeter = metrics.NewMeter("eth/db/block/compact/input")
		db.CompWriteMeter = metrics.NewMeter("eth/db/block/compact/output")
	}
	stateDb, err := newdb(filepath.Join(config.DataDir, "state"))
	if err != nil {
		return nil, fmt.Errorf("state db err: %v", err)
	}
	if db, ok := stateDb.(*ethdb.LDBDatabase); ok {
		db.GetTimer = metrics.NewTimer("eth/db/state/user/gets")
		db.PutTimer = metrics.NewTimer("eth/db/state/user/puts")
		db.MissMeter = metrics.NewMeter("eth/db/state/user/misses")
		db.ReadMeter = metrics.NewMeter("eth/db/state/user/reads")
		db.WriteMeter = metrics.NewMeter("eth/db/state/user/writes")
		db.CompTimeMeter = metrics.NewMeter("eth/db/state/compact/time")
		db.CompReadMeter = metrics.NewMeter("eth/db/state/compact/input")
		db.CompWriteMeter = metrics.NewMeter("eth/db/state/compact/output")
	}
	extraDb, err := newdb(filepath.Join(config.DataDir, "extra"))
	if err != nil {
		return nil, fmt.Errorf("extra db err: %v", err)
	}
	if db, ok := extraDb.(*ethdb.LDBDatabase); ok {
		db.GetTimer = metrics.NewTimer("eth/db/extra/user/gets")
		db.PutTimer = metrics.NewTimer("eth/db/extra/user/puts")
		db.MissMeter = metrics.NewMeter("eth/db/extra/user/misses")
		db.ReadMeter = metrics.NewMeter("eth/db/extra/user/reads")
		db.WriteMeter = metrics.NewMeter("eth/db/extra/user/writes")
		db.CompTimeMeter = metrics.NewMeter("eth/db/extra/compact/time")
		db.CompReadMeter = metrics.NewMeter("eth/db/extra/compact/input")
		db.CompWriteMeter = metrics.NewMeter("eth/db/extra/compact/output")
	}
	nodeDb := filepath.Join(config.DataDir, "nodes")

	// Perform database sanity checks
	d, _ := blockDb.Get([]byte("ProtocolVersion"))
	protov := int(common.NewValue(d).Uint())
	if protov != config.ProtocolVersion && protov != 0 {
		path := filepath.Join(config.DataDir, "blockchain")
		return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, config.ProtocolVersion, path)
	}
	saveProtocolVersion(blockDb, config.ProtocolVersion)
	glog.V(logger.Info).Infof("Protocol Version: %v, Network Id: %v", config.ProtocolVersion, config.NetworkId)

	if !config.SkipBcVersionCheck {
		b, _ := blockDb.Get([]byte("BlockchainVersion"))
		bcVersion := int(common.NewValue(b).Uint())
		if bcVersion != config.BlockChainVersion && bcVersion != 0 {
			return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run geth upgradedb.\n", bcVersion, config.BlockChainVersion)
		}
		saveBlockchainVersion(blockDb, config.BlockChainVersion)
	}
	glog.V(logger.Info).Infof("Blockchain DB Version: %d", config.BlockChainVersion)

	eth := &Ethereum{
		shutdownChan:            make(chan bool),
		databasesClosed:         make(chan bool),
		blockDb:                 blockDb,
		stateDb:                 stateDb,
		extraDb:                 extraDb,
		eventMux:                &event.TypeMux{},
		accountManager:          config.AccountManager,
		DataDir:                 config.DataDir,
		etherbase:               common.HexToAddress(config.Etherbase),
		clientVersion:           config.Name, // TODO should separate from Name
		ethVersionId:            config.ProtocolVersion,
		netVersionId:            config.NetworkId,
		NatSpec:                 config.NatSpec,
		MinerThreads:            config.MinerThreads,
		SolcPath:                config.SolcPath,
		AutoDAG:                 config.AutoDAG,
		GpoMinGasPrice:          config.GpoMinGasPrice,
		GpoMaxGasPrice:          config.GpoMaxGasPrice,
		GpoFullBlockRatio:       config.GpoFullBlockRatio,
		GpobaseStepDown:         config.GpobaseStepDown,
//.........這裏部分代碼省略.........

func TestMipmapChain(t *testing.T) {
	dir, err := ioutil.TempDir("", "mipmap")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(dir)

	var (
		db, _   = ethdb.NewLDBDatabase(dir, 16)
		key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
		addr    = crypto.PubkeyToAddress(key1.PublicKey)
		addr2   = common.BytesToAddress([]byte("jeff"))

		hash1 = common.BytesToHash([]byte("topic1"))
	)
	defer db.Close()

	genesis := WriteGenesisBlockForTesting(db, GenesisAccount{addr, big.NewInt(1000000)})
	chain, receipts := GenerateChain(genesis, db, 1010, func(i int, gen *BlockGen) {
		var receipts types.Receipts
		switch i {
		case 1:
			receipt := types.NewReceipt(nil, new(big.Int))
			receipt.Logs = vm.Logs{
				&vm.Log{
					Address: addr,
					Topics:  []common.Hash{hash1},
				},
			}
			gen.AddUncheckedReceipt(receipt)
			receipts = types.Receipts{receipt}
		case 1000:
			receipt := types.NewReceipt(nil, new(big.Int))
			receipt.Logs = vm.Logs{&vm.Log{Address: addr2}}
			gen.AddUncheckedReceipt(receipt)
			receipts = types.Receipts{receipt}

		}

		// store the receipts
		err := PutReceipts(db, receipts)
		if err != nil {
			t.Fatal(err)
		}
		WriteMipmapBloom(db, uint64(i+1), receipts)
	})
	for i, block := range chain {
		WriteBlock(db, block)
		if err := WriteCanonicalHash(db, block.Hash(), block.NumberU64()); err != nil {
			t.Fatalf("failed to insert block number: %v", err)
		}
		if err := WriteHeadBlockHash(db, block.Hash()); err != nil {
			t.Fatalf("failed to insert block number: %v", err)
		}
		if err := PutBlockReceipts(db, block.Hash(), receipts[i]); err != nil {
			t.Fatal("error writing block receipts:", err)
		}
	}

	bloom := GetMipmapBloom(db, 0, 1000)
	if bloom.TestBytes(addr2[:]) {
		t.Error("address was included in bloom and should not have")
	}
}

func New(config *Config) (*Ethereum, error) {
	// Bootstrap database
	logger.New(config.DataDir, config.LogFile, config.Verbosity)
	if len(config.LogJSON) > 0 {
		logger.NewJSONsystem(config.DataDir, config.LogJSON)
	}

	// Let the database take 3/4 of the max open files (TODO figure out a way to get the actual limit of the open files)
	const dbCount = 3
	ethdb.OpenFileLimit = 256 / (dbCount + 1)

	newdb := config.NewDB
	if newdb == nil {
		newdb = func(path string) (common.Database, error) { return ethdb.NewLDBDatabase(path) }
	}
	blockDb, err := newdb(filepath.Join(config.DataDir, "blockchain"))
	if err != nil {
		return nil, fmt.Errorf("blockchain db err: %v", err)
	}
	stateDb, err := newdb(filepath.Join(config.DataDir, "state"))
	if err != nil {
		return nil, fmt.Errorf("state db err: %v", err)
	}
	extraDb, err := newdb(filepath.Join(config.DataDir, "extra"))
	if err != nil {
		return nil, fmt.Errorf("extra db err: %v", err)
	}
	nodeDb := filepath.Join(config.DataDir, "nodes")

	// Perform database sanity checks
	d, _ := blockDb.Get([]byte("ProtocolVersion"))
	protov := int(common.NewValue(d).Uint())
	if protov != config.ProtocolVersion && protov != 0 {
		path := filepath.Join(config.DataDir, "blockchain")
		return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, config.ProtocolVersion, path)
	}
	saveProtocolVersion(blockDb, config.ProtocolVersion)
	glog.V(logger.Info).Infof("Protocol Version: %v, Network Id: %v", config.ProtocolVersion, config.NetworkId)

	if !config.SkipBcVersionCheck {
		b, _ := blockDb.Get([]byte("BlockchainVersion"))
		bcVersion := int(common.NewValue(b).Uint())
		if bcVersion != config.BlockChainVersion && bcVersion != 0 {
			return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run geth upgradedb.\n", bcVersion, config.BlockChainVersion)
		}
		saveBlockchainVersion(blockDb, config.BlockChainVersion)
	}
	glog.V(logger.Info).Infof("Blockchain DB Version: %d", config.BlockChainVersion)

	eth := &Ethereum{
		shutdownChan:    make(chan bool),
		databasesClosed: make(chan bool),
		blockDb:         blockDb,
		stateDb:         stateDb,
		extraDb:         extraDb,
		eventMux:        &event.TypeMux{},
		accountManager:  config.AccountManager,
		DataDir:         config.DataDir,
		etherbase:       common.HexToAddress(config.Etherbase),
		clientVersion:   config.Name, // TODO should separate from Name
		ethVersionId:    config.ProtocolVersion,
		netVersionId:    config.NetworkId,
		NatSpec:         config.NatSpec,
	}

	eth.chainManager = core.NewChainManager(blockDb, stateDb, eth.EventMux())
	eth.downloader = downloader.New(eth.chainManager.HasBlock, eth.chainManager.GetBlock)
	eth.pow = ethash.New()
	eth.txPool = core.NewTxPool(eth.EventMux(), eth.chainManager.State, eth.chainManager.GasLimit)
	eth.blockProcessor = core.NewBlockProcessor(stateDb, extraDb, eth.pow, eth.txPool, eth.chainManager, eth.EventMux())
	eth.chainManager.SetProcessor(eth.blockProcessor)
	eth.miner = miner.New(eth, eth.pow)
	eth.miner.SetGasPrice(config.GasPrice)

	eth.protocolManager = NewProtocolManager(config.ProtocolVersion, config.NetworkId, eth.eventMux, eth.txPool, eth.chainManager, eth.downloader)
	if config.Shh {
		eth.whisper = whisper.New()
		eth.shhVersionId = int(eth.whisper.Version())
	}

	netprv, err := config.nodeKey()
	if err != nil {
		return nil, err
	}
	protocols := []p2p.Protocol{eth.protocolManager.SubProtocol}
	if config.Shh {
		protocols = append(protocols, eth.whisper.Protocol())
	}
	eth.net = &p2p.Server{
		PrivateKey:      netprv,
		Name:            config.Name,
		MaxPeers:        config.MaxPeers,
		MaxPendingPeers: config.MaxPendingPeers,
		Protocols:       protocols,
		NAT:             config.NAT,
		NoDial:          !config.Dial,
		BootstrapNodes:  config.parseBootNodes(),
		StaticNodes:     config.parseNodes(staticNodes),
		TrustedNodes:    config.parseNodes(trustedNodes),
		NodeDatabase:    nodeDb,
//.........這裏部分代碼省略.........

func New(config *Config) (*Ethereum, error) {
	// Bootstrap database
	logger.New(config.DataDir, config.LogFile, config.Verbosity)
	if len(config.LogJSON) > 0 {
		logger.NewJSONsystem(config.DataDir, config.LogJSON)
	}

	// Let the database take 3/4 of the max open files (TODO figure out a way to get the actual limit of the open files)
	const dbCount = 3
	ethdb.OpenFileLimit = 128 / (dbCount + 1)

	newdb := config.NewDB
	if newdb == nil {
		newdb = func(path string) (common.Database, error) { return ethdb.NewLDBDatabase(path, config.DatabaseCache) }
	}
	blockDb, err := newdb(filepath.Join(config.DataDir, "blockchain"))
	if err != nil {
		return nil, fmt.Errorf("blockchain db err: %v", err)
	}
	if db, ok := blockDb.(*ethdb.LDBDatabase); ok {
		db.Meter("eth/db/block/")
	}
	stateDb, err := newdb(filepath.Join(config.DataDir, "state"))
	if err != nil {
		return nil, fmt.Errorf("state db err: %v", err)
	}
	if db, ok := stateDb.(*ethdb.LDBDatabase); ok {
		db.Meter("eth/db/state/")
	}
	extraDb, err := newdb(filepath.Join(config.DataDir, "extra"))
	if err != nil {
		return nil, fmt.Errorf("extra db err: %v", err)
	}
	if db, ok := extraDb.(*ethdb.LDBDatabase); ok {
		db.Meter("eth/db/extra/")
	}
	nodeDb := filepath.Join(config.DataDir, "nodes")
	glog.V(logger.Info).Infof("Protocol Versions: %v, Network Id: %v", ProtocolVersions, config.NetworkId)

	if len(config.GenesisFile) > 0 {
		fr, err := os.Open(config.GenesisFile)
		if err != nil {
			return nil, err
		}

		block, err := core.WriteGenesisBlock(stateDb, blockDb, fr)
		if err != nil {
			return nil, err
		}
		glog.V(logger.Info).Infof("Successfully wrote genesis block. New genesis hash = %x\n", block.Hash())
	}

	if config.Olympic {
		_, err := core.WriteTestNetGenesisBlock(stateDb, blockDb, 42)
		if err != nil {
			return nil, err
		}
		glog.V(logger.Error).Infoln("Starting Olympic network")
	}

	// This is for testing only.
	if config.GenesisBlock != nil {
		core.WriteBlock(blockDb, config.GenesisBlock)
		core.WriteHead(blockDb, config.GenesisBlock)
	}

	if !config.SkipBcVersionCheck {
		b, _ := blockDb.Get([]byte("BlockchainVersion"))
		bcVersion := int(common.NewValue(b).Uint())
		if bcVersion != config.BlockChainVersion && bcVersion != 0 {
			return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run geth upgradedb.\n", bcVersion, config.BlockChainVersion)
		}
		saveBlockchainVersion(blockDb, config.BlockChainVersion)
	}
	glog.V(logger.Info).Infof("Blockchain DB Version: %d", config.BlockChainVersion)

	eth := &Ethereum{
		shutdownChan:            make(chan bool),
		databasesClosed:         make(chan bool),
		blockDb:                 blockDb,
		stateDb:                 stateDb,
		extraDb:                 extraDb,
		eventMux:                &event.TypeMux{},
		accountManager:          config.AccountManager,
		DataDir:                 config.DataDir,
		etherbase:               config.Etherbase,
		clientVersion:           config.Name, // TODO should separate from Name
		netVersionId:            config.NetworkId,
		NatSpec:                 config.NatSpec,
		MinerThreads:            config.MinerThreads,
		SolcPath:                config.SolcPath,
		AutoDAG:                 config.AutoDAG,
		PowTest:                 config.PowTest,
		GpoMinGasPrice:          config.GpoMinGasPrice,
		GpoMaxGasPrice:          config.GpoMaxGasPrice,
		GpoFullBlockRatio:       config.GpoFullBlockRatio,
		GpobaseStepDown:         config.GpobaseStepDown,
		GpobaseStepUp:           config.GpobaseStepUp,
		GpobaseCorrectionFactor: config.GpobaseCorrectionFactor,
	}
//.........這裏部分代碼省略.........