// PrivatePass prompts the user for a private passphrase with varying behavior
// depending on whether the passed legacy keystore exists.  When it does, the
// user is prompted for the existing passphrase which is then used to unlock it.
// On the other hand, when the legacy keystore is nil, the user is prompted for
// a new private passphrase.  All prompts are repeated until the user enters a
// valid response.
func PrivatePass(reader *bufio.Reader, legacyKeyStore *keystore.Store) ([]byte, error) {
	// When there is not an existing legacy wallet, simply prompt the user
	// for a new private passphase and return it.
	if legacyKeyStore == nil {
		return promptPass(reader, "Enter the private "+
			"passphrase for your new wallet", true)
	}

	// At this point, there is an existing legacy wallet, so prompt the user
	// for the existing private passphrase and ensure it properly unlocks
	// the legacy wallet so all of the addresses can later be imported.
	fmt.Println("You have an existing legacy wallet.  All addresses from " +
		"your existing legacy wallet will be imported into the new " +
		"wallet format.")
	for {
		privPass, err := promptPass(reader, "Enter the private "+
			"passphrase for your existing wallet", false)
		if err != nil {
			return nil, err
		}

		// Keep prompting the user until the passphrase is correct.
		if err := legacyKeyStore.Unlock([]byte(privPass)); err != nil {
			if err == keystore.ErrWrongPassphrase {
				fmt.Println(err)
				continue
			}

			return nil, err
		}

		return privPass, nil
	}
}

// convertLegacyKeystore converts all of the addresses in the passed legacy
// key store to the new waddrmgr.Manager format.  Both the legacy keystore and
// the new manager must be unlocked.
func convertLegacyKeystore(legacyKeyStore *keystore.Store, manager *waddrmgr.Manager) error {
	netParams := legacyKeyStore.Net()
	blockStamp := waddrmgr.BlockStamp{
		Height: 0,
		Hash:   *netParams.GenesisHash,
	}
	for _, walletAddr := range legacyKeyStore.ActiveAddresses() {
		switch addr := walletAddr.(type) {
		case keystore.PubKeyAddress:
			privKey, err := addr.PrivKey()
			if err != nil {
				fmt.Printf("WARN: Failed to obtain private key "+
					"for address %v: %v\n", addr.Address(),
					err)
				continue
			}

			wif, err := btcutil.NewWIF((*btcec.PrivateKey)(privKey),
				netParams, addr.Compressed())
			if err != nil {
				fmt.Printf("WARN: Failed to create wallet "+
					"import format for address %v: %v\n",
					addr.Address(), err)
				continue
			}

			_, err = manager.ImportPrivateKey(wif, &blockStamp)
			if err != nil {
				fmt.Printf("WARN: Failed to import private "+
					"key for address %v: %v\n",
					addr.Address(), err)
				continue
			}

		case keystore.ScriptAddress:
			_, err := manager.ImportScript(addr.Script(), &blockStamp)
			if err != nil {
				fmt.Printf("WARN: Failed to import "+
					"pay-to-script-hash script for "+
					"address %v: %v\n", addr.Address(), err)
				continue
			}

		default:
			fmt.Printf("WARN: Skipping unrecognized legacy "+
				"keystore type: %T\n", addr)
			continue
		}
	}

	return nil
}

// createWallet prompts the user for information needed to generate a new wallet
// and generates the wallet accordingly.  The new wallet will reside at the
// provided path.
func createWallet(cfg *config) error {
	// When there is a legacy keystore, open it now to ensure any errors
	// don't end up exiting the process after the user has spent time
	// entering a bunch of information.
	netDir := networkDir(cfg.DataDir, activeNet.Params)
	keystorePath := filepath.Join(netDir, keystore.Filename)
	var legacyKeyStore *keystore.Store
	if fileExists(keystorePath) {
		var err error
		legacyKeyStore, err = keystore.OpenDir(netDir)
		if err != nil {
			return err
		}
	}

	// Start by prompting for the private passphrase.  When there is an
	// existing keystore, the user will be promped for that passphrase,
	// otherwise they will be prompted for a new one.
	reader := bufio.NewReader(os.Stdin)
	privPass, err := promptConsolePrivatePass(reader, legacyKeyStore)
	if err != nil {
		return err
	}

	// Ascertain the public passphrase.  This will either be a value
	// specified by the user or the default hard-coded public passphrase if
	// the user does not want the additional public data encryption.
	pubPass, err := promptConsolePublicPass(reader, privPass, cfg)
	if err != nil {
		return err
	}

	// Ascertain the wallet generation seed.  This will either be an
	// automatically generated value the user has already confirmed or a
	// value the user has entered which has already been validated.
	seed, err := promptConsoleSeed(reader)
	if err != nil {
		return err
	}

	// Create the wallet.
	dbPath := filepath.Join(netDir, walletDbName)
	fmt.Println("Creating the wallet...")

	// Create the wallet database backed by bolt db.
	db, err := walletdb.Create("bdb", dbPath)
	if err != nil {
		return err
	}

	// Create the address manager.
	namespace, err := db.Namespace(waddrmgrNamespaceKey)
	if err != nil {
		return err
	}
	manager, err := waddrmgr.Create(namespace, seed, []byte(pubPass),
		[]byte(privPass), activeNet.Params, nil)
	if err != nil {
		return err
	}

	// Import the addresses in the legacy keystore to the new wallet if
	// any exist.
	if legacyKeyStore != nil {
		fmt.Println("Importing addresses from existing wallet...")
		if err := manager.Unlock([]byte(privPass)); err != nil {
			return err
		}
		if err := convertLegacyKeystore(legacyKeyStore, manager); err != nil {
			return err
		}

		legacyKeyStore.Lock()
		legacyKeyStore = nil

		// Remove the legacy key store.
		if err := os.Remove(keystorePath); err != nil {
			fmt.Printf("WARN: Failed to remove legacy wallet "+
				"from'%s'\n", keystorePath)
		}
	}

	manager.Close()
	fmt.Println("The wallet has been created successfully.")
	return nil
}

// createWallet prompts the user for information needed to generate a new wallet
// and generates the wallet accordingly.  The new wallet will reside at the
// provided path.
func createWallet(cfg *config) error {
	dbDir := networkDir(cfg.AppDataDir.Value, activeNet.Params)
	loader := wallet.NewLoader(activeNet.Params, dbDir)

	// When there is a legacy keystore, open it now to ensure any errors
	// don't end up exiting the process after the user has spent time
	// entering a bunch of information.
	netDir := networkDir(cfg.AppDataDir.Value, activeNet.Params)
	keystorePath := filepath.Join(netDir, keystore.Filename)
	var legacyKeyStore *keystore.Store
	_, err := os.Stat(keystorePath)
	if err != nil && !os.IsNotExist(err) {
		// A stat error not due to a non-existant file should be
		// returned to the caller.
		return err
	} else if err == nil {
		// Keystore file exists.
		legacyKeyStore, err = keystore.OpenDir(netDir)
		if err != nil {
			return err
		}
	}

	// Start by prompting for the private passphrase.  When there is an
	// existing keystore, the user will be promped for that passphrase,
	// otherwise they will be prompted for a new one.
	reader := bufio.NewReader(os.Stdin)
	privPass, err := prompt.PrivatePass(reader, legacyKeyStore)
	if err != nil {
		return err
	}

	// When there exists a legacy keystore, unlock it now and set up a
	// callback to import all keystore keys into the new walletdb
	// wallet
	if legacyKeyStore != nil {
		err = legacyKeyStore.Unlock(privPass)
		if err != nil {
			return err
		}

		// Import the addresses in the legacy keystore to the new wallet if
		// any exist, locking each wallet again when finished.
		loader.RunAfterLoad(func(w *wallet.Wallet) {
			defer legacyKeyStore.Lock()

			fmt.Println("Importing addresses from existing wallet...")

			err := w.Manager.Unlock(privPass)
			if err != nil {
				fmt.Printf("ERR: Failed to unlock new wallet "+
					"during old wallet key import: %v", err)
				return
			}
			defer w.Manager.Lock()

			err = convertLegacyKeystore(legacyKeyStore, w.Manager)
			if err != nil {
				fmt.Printf("ERR: Failed to import keys from old "+
					"wallet format: %v", err)
				return
			}

			// Remove the legacy key store.
			err = os.Remove(keystorePath)
			if err != nil {
				fmt.Printf("WARN: Failed to remove legacy wallet "+
					"from'%s'\n", keystorePath)
			}
		})
	}

	// Ascertain the public passphrase.  This will either be a value
	// specified by the user or the default hard-coded public passphrase if
	// the user does not want the additional public data encryption.
	pubPass, err := prompt.PublicPass(reader, privPass,
		[]byte(wallet.InsecurePubPassphrase), []byte(cfg.WalletPass))
	if err != nil {
		return err
	}

	// Ascertain the wallet generation seed.  This will either be an
	// automatically generated value the user has already confirmed or a
	// value the user has entered which has already been validated.
	seed, err := prompt.Seed(reader)
	if err != nil {
		return err
	}

	fmt.Println("Creating the wallet...")
	w, err := loader.CreateNewWallet(pubPass, privPass, seed)
	if err != nil {
		return err
	}

	w.Manager.Close()
	fmt.Println("The wallet has been created successfully.")
//.........这里部分代码省略.........