// Copyright 2016 The go-ethereum Authors // This file is part of the go-ethereum library. // // The go-ethereum library is free software: you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // The go-ethereum library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. package node import ( "os" "os/user" "path/filepath" "runtime" "github.com/ava-labs/go-ethereum/p2p" "github.com/ava-labs/go-ethereum/p2p/nat" "github.com/ava-labs/go-ethereum/rpc" ) const ( DefaultHTTPHost = "localhost" // Default host interface for the HTTP RPC server DefaultHTTPPort = 8545 // Default TCP port for the HTTP RPC server DefaultWSHost = "localhost" // Default host interface for the websocket RPC server DefaultWSPort = 8546 // Default TCP port for the websocket RPC server DefaultGraphQLHost = "localhost" // Default host interface for the GraphQL server DefaultGraphQLPort = 8547 // Default TCP port for the GraphQL server ) // DefaultConfig contains reasonable default settings. var DefaultConfig = Config{ DataDir: DefaultDataDir(), HTTPPort: DefaultHTTPPort, HTTPModules: []string{"net", "web3"}, HTTPVirtualHosts: []string{"localhost"}, HTTPTimeouts: rpc.DefaultHTTPTimeouts, WSPort: DefaultWSPort, WSModules: []string{"net", "web3"}, GraphQLPort: DefaultGraphQLPort, GraphQLVirtualHosts: []string{"localhost"}, P2P: p2p.Config{ ListenAddr: ":30303", MaxPeers: 50, NAT: nat.Any(), }, } // DefaultDataDir is the default data directory to use for the databases and other // persistence requirements. func DefaultDataDir() string { // Try to place the data folder in the user's home dir home := homeDir() if home != "" { switch runtime.GOOS { case "darwin": return filepath.Join(home, "Library", "Ethereum") case "windows": // We used to put everything in %HOME%\AppData\Roaming, but this caused // problems with non-typical setups. If this fallback location exists and // is non-empty, use it, otherwise DTRT and check %LOCALAPPDATA%. fallback := filepath.Join(home, "AppData", "Roaming", "Ethereum") appdata := windowsAppData() if appdata == "" || isNonEmptyDir(fallback) { return fallback } return filepath.Join(appdata, "Ethereum") default: return filepath.Join(home, ".ethereum") } } // As we cannot guess a stable location, return empty and handle later return "" } func windowsAppData() string { v := os.Getenv("LOCALAPPDATA") if v == "" { // Windows XP and below don't have LocalAppData. Crash here because // we don't support Windows XP and undefining the variable will cause // other issues. panic("environment variable LocalAppData is undefined") } return v } func isNonEmptyDir(dir string) bool { f, err := os.Open(dir) if err != nil { return false } names, _ := f.Readdir(1) f.Close() return len(names) > 0 } func homeDir() string { if home := os.Getenv("HOME"); home != "" { return home } if usr, err := user.Current(); err == nil { return usr.HomeDir } return "" }