gitlab.com/lightnet1/evrynet-node@v1.1.0/node/defaults.go (about)

     1  // Copyright 2016 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 node
    18  
    19  import (
    20  	"os"
    21  	"os/user"
    22  	"path/filepath"
    23  	"runtime"
    24  
    25  	"gitlab.com/lightnet1/evrynet-node/p2p"
    26  	"gitlab.com/lightnet1/evrynet-node/p2p/nat"
    27  	"gitlab.com/lightnet1/evrynet-node/rpc"
    28  )
    29  
    30  const (
    31  	DefaultHTTPHost    = "localhost" // Default host interface for the HTTP RPC server
    32  	DefaultHTTPPort    = 8545        // Default TCP port for the HTTP RPC server
    33  	DefaultWSHost      = "localhost" // Default host interface for the websocket RPC server
    34  	DefaultWSPort      = 8546        // Default TCP port for the websocket RPC server
    35  	DefaultGraphQLHost = "localhost" // Default host interface for the GraphQL server
    36  	DefaultGraphQLPort = 8547        // Default TCP port for the GraphQL server
    37  )
    38  
    39  // DefaultConfig contains reasonable default settings.
    40  var DefaultConfig = Config{
    41  	DataDir:          DefaultDataDir(),
    42  	HTTPPort:         DefaultHTTPPort,
    43  	HTTPModules:      []string{"net", "web3"},
    44  	HTTPVirtualHosts: []string{"localhost"},
    45  	HTTPTimeouts:     rpc.DefaultHTTPTimeouts,
    46  	WSPort:           DefaultWSPort,
    47  	WSModules:        []string{"net", "web3"},
    48  	P2P: p2p.Config{
    49  		ListenAddr: ":30303",
    50  		MaxPeers:   50,
    51  		NAT:        nat.Any(),
    52  	},
    53  }
    54  
    55  // DefaultDataDir is the default data directory to use for the databases and other
    56  // persistence requirements.
    57  func DefaultDataDir() string {
    58  	// Try to place the data folder in the user's home dir
    59  	home := homeDir()
    60  	if home != "" {
    61  		switch runtime.GOOS {
    62  		case "darwin":
    63  			return filepath.Join(home, "Library", "Evrynet")
    64  		case "windows":
    65  			// We used to put everything in %HOME%\AppData\Roaming, but this caused
    66  			// problems with non-typical setups. If this fallback location exists and
    67  			// is non-empty, use it, otherwise DTRT and check %LOCALAPPDATA%.
    68  			fallback := filepath.Join(home, "AppData", "Roaming", "Evrynet")
    69  			appdata := windowsAppData()
    70  			if appdata == "" || isNonEmptyDir(fallback) {
    71  				return fallback
    72  			}
    73  			return filepath.Join(appdata, "Evrynet")
    74  		default:
    75  			return filepath.Join(home, ".ethereum")
    76  		}
    77  	}
    78  	// As we cannot guess a stable location, return empty and handle later
    79  	return ""
    80  }
    81  
    82  func windowsAppData() string {
    83  	v := os.Getenv("LOCALAPPDATA")
    84  	if v == "" {
    85  		// Windows XP and below don't have LocalAppData. Crash here because
    86  		// we don't support Windows XP and undefining the variable will cause
    87  		// other issues.
    88  		panic("environment variable LocalAppData is undefined")
    89  	}
    90  	return v
    91  }
    92  
    93  func isNonEmptyDir(dir string) bool {
    94  	f, err := os.Open(dir)
    95  	if err != nil {
    96  		return false
    97  	}
    98  	names, _ := f.Readdir(1)
    99  	f.Close()
   100  	return len(names) > 0
   101  }
   102  
   103  func homeDir() string {
   104  	if home := os.Getenv("HOME"); home != "" {
   105  		return home
   106  	}
   107  	if usr, err := user.Current(); err == nil {
   108  		return usr.HomeDir
   109  	}
   110  	return ""
   111  }