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// 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 common

import (
    "path/filepath"
    "runtime"
)

const (
    DefaultIpcSocket = "geth.ipc"  // Default (relative) name of the IPC RPC socket
    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
)

// 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 != "" {
        if runtime.GOOS == "darwin" {
            return filepath.Join(home, "Library", "Ethereum")
        } else if runtime.GOOS == "windows" {
            return filepath.Join(home, "AppData", "Roaming", "Ethereum")
        } else {
            return filepath.Join(home, ".ethereum")
        }
    }
    // As we cannot guess a stable location, return empty and handle later
    return ""
}