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authorDeterminant <[email protected]>2019-08-09 21:15:05 -0400
committerDeterminant <[email protected]>2019-08-09 21:15:05 -0400
commit4c1616a746a648c816042f596eb199174a9858f1 (patch)
tree8db0871957d3a3357ab1ec7bf762ad7481bbd380 /node/defaults.go
parent6310b748db9fbcea0872db930385760b29f9659c (diff)
add necessary code base
Diffstat (limited to 'node/defaults.go')
-rw-r--r--node/defaults.go113
1 files changed, 113 insertions, 0 deletions
diff --git a/node/defaults.go b/node/defaults.go
new file mode 100644
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+++ b/node/defaults.go
@@ -0,0 +1,113 @@
+// 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/ethereum/go-ethereum/p2p"
+ "github.com/ethereum/go-ethereum/p2p/nat"
+ "github.com/ethereum/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 ""
+}