mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
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8f8774cf6d
* fix typo * fix typo * fix typo
438 lines
15 KiB
Go
438 lines
15 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package node
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import (
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"crypto/ecdsa"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/accounts/keystore"
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"github.com/ethereum/go-ethereum/accounts/usbwallet"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discover"
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)
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const (
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datadirPrivateKey = "nodekey" // Path within the datadir to the node's private key
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datadirDefaultKeyStore = "keystore" // Path within the datadir to the keystore
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datadirStaticNodes = "static-nodes.json" // Path within the datadir to the static node list
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datadirTrustedNodes = "trusted-nodes.json" // Path within the datadir to the trusted node list
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datadirNodeDatabase = "nodes" // Path within the datadir to store the node infos
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)
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// Config represents a small collection of configuration values to fine tune the
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// P2P network layer of a protocol stack. These values can be further extended by
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// all registered services.
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type Config struct {
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// Name sets the instance name of the node. It must not contain the / character and is
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// used in the devp2p node identifier. The instance name of geth is "geth". If no
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// value is specified, the basename of the current executable is used.
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Name string `toml:"-"`
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// UserIdent, if set, is used as an additional component in the devp2p node identifier.
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UserIdent string `toml:",omitempty"`
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// Version should be set to the version number of the program. It is used
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// in the devp2p node identifier.
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Version string `toml:"-"`
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// DataDir is the file system folder the node should use for any data storage
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// requirements. The configured data directory will not be directly shared with
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// registered services, instead those can use utility methods to create/access
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// databases or flat files. This enables ephemeral nodes which can fully reside
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// in memory.
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DataDir string
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// Configuration of peer-to-peer networking.
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P2P p2p.Config
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// KeyStoreDir is the file system folder that contains private keys. The directory can
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// be specified as a relative path, in which case it is resolved relative to the
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// current directory.
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//
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// If KeyStoreDir is empty, the default location is the "keystore" subdirectory of
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// DataDir. If DataDir is unspecified and KeyStoreDir is empty, an ephemeral directory
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// is created by New and destroyed when the node is stopped.
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KeyStoreDir string `toml:",omitempty"`
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// UseLightweightKDF lowers the memory and CPU requirements of the key store
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// scrypt KDF at the expense of security.
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UseLightweightKDF bool `toml:",omitempty"`
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// NoUSB disables hardware wallet monitoring and connectivity.
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NoUSB bool `toml:",omitempty"`
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// IPCPath is the requested location to place the IPC endpoint. If the path is
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// a simple file name, it is placed inside the data directory (or on the root
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// pipe path on Windows), whereas if it's a resolvable path name (absolute or
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// relative), then that specific path is enforced. An empty path disables IPC.
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IPCPath string `toml:",omitempty"`
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// HTTPHost is the host interface on which to start the HTTP RPC server. If this
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// field is empty, no HTTP API endpoint will be started.
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HTTPHost string `toml:",omitempty"`
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// HTTPPort is the TCP port number on which to start the HTTP RPC server. The
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// default zero value is/ valid and will pick a port number randomly (useful
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// for ephemeral nodes).
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HTTPPort int `toml:",omitempty"`
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// HTTPCors is the Cross-Origin Resource Sharing header to send to requesting
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// clients. Please be aware that CORS is a browser enforced security, it's fully
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// useless for custom HTTP clients.
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HTTPCors []string `toml:",omitempty"`
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// HTTPVirtualHosts is the list of virtual hostnames which are allowed on incoming requests.
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// This is by default {'localhost'}. Using this prevents attacks like
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// DNS rebinding, which bypasses SOP by simply masquerading as being within the same
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// origin. These attacks do not utilize CORS, since they are not cross-domain.
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// By explicitly checking the Host-header, the server will not allow requests
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// made against the server with a malicious host domain.
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// Requests using ip address directly are not affected
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HTTPVirtualHosts []string `toml:",omitempty"`
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// HTTPModules is a list of API modules to expose via the HTTP RPC interface.
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// If the module list is empty, all RPC API endpoints designated public will be
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// exposed.
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HTTPModules []string `toml:",omitempty"`
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// WSHost is the host interface on which to start the websocket RPC server. If
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// this field is empty, no websocket API endpoint will be started.
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WSHost string `toml:",omitempty"`
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// WSPort is the TCP port number on which to start the websocket RPC server. The
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// default zero value is/ valid and will pick a port number randomly (useful for
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// ephemeral nodes).
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WSPort int `toml:",omitempty"`
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// WSOrigins is the list of domain to accept websocket requests from. Please be
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// aware that the server can only act upon the HTTP request the client sends and
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// cannot verify the validity of the request header.
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WSOrigins []string `toml:",omitempty"`
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// WSModules is a list of API modules to expose via the websocket RPC interface.
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// If the module list is empty, all RPC API endpoints designated public will be
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// exposed.
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WSModules []string `toml:",omitempty"`
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// WSExposeAll exposes all API modules via the WebSocket RPC interface rather
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// than just the public ones.
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//
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// *WARNING* Only set this if the node is running in a trusted network, exposing
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// private APIs to untrusted users is a major security risk.
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WSExposeAll bool `toml:",omitempty"`
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// Logger is a custom logger to use with the p2p.Server.
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Logger log.Logger `toml:",omitempty"`
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}
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// IPCEndpoint resolves an IPC endpoint based on a configured value, taking into
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// account the set data folders as well as the designated platform we're currently
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// running on.
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func (c *Config) IPCEndpoint() string {
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// Short circuit if IPC has not been enabled
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if c.IPCPath == "" {
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return ""
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}
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// On windows we can only use plain top-level pipes
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if runtime.GOOS == "windows" {
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if strings.HasPrefix(c.IPCPath, `\\.\pipe\`) {
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return c.IPCPath
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}
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return `\\.\pipe\` + c.IPCPath
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}
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// Resolve names into the data directory full paths otherwise
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if filepath.Base(c.IPCPath) == c.IPCPath {
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if c.DataDir == "" {
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return filepath.Join(os.TempDir(), c.IPCPath)
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}
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return filepath.Join(c.DataDir, c.IPCPath)
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}
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return c.IPCPath
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}
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// NodeDB returns the path to the discovery node database.
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func (c *Config) NodeDB() string {
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if c.DataDir == "" {
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return "" // ephemeral
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}
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return c.resolvePath(datadirNodeDatabase)
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}
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// DefaultIPCEndpoint returns the IPC path used by default.
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func DefaultIPCEndpoint(clientIdentifier string) string {
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if clientIdentifier == "" {
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clientIdentifier = strings.TrimSuffix(filepath.Base(os.Args[0]), ".exe")
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if clientIdentifier == "" {
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panic("empty executable name")
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}
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}
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config := &Config{DataDir: DefaultDataDir(), IPCPath: clientIdentifier + ".ipc"}
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return config.IPCEndpoint()
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}
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// HTTPEndpoint resolves an HTTP endpoint based on the configured host interface
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// and port parameters.
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func (c *Config) HTTPEndpoint() string {
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if c.HTTPHost == "" {
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return ""
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}
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return fmt.Sprintf("%s:%d", c.HTTPHost, c.HTTPPort)
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}
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// DefaultHTTPEndpoint returns the HTTP endpoint used by default.
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func DefaultHTTPEndpoint() string {
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config := &Config{HTTPHost: DefaultHTTPHost, HTTPPort: DefaultHTTPPort}
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return config.HTTPEndpoint()
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}
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// WSEndpoint resolves a websocket endpoint based on the configured host interface
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// and port parameters.
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func (c *Config) WSEndpoint() string {
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if c.WSHost == "" {
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return ""
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}
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return fmt.Sprintf("%s:%d", c.WSHost, c.WSPort)
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}
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// DefaultWSEndpoint returns the websocket endpoint used by default.
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func DefaultWSEndpoint() string {
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config := &Config{WSHost: DefaultWSHost, WSPort: DefaultWSPort}
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return config.WSEndpoint()
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}
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// NodeName returns the devp2p node identifier.
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func (c *Config) NodeName() string {
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name := c.name()
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// Backwards compatibility: previous versions used title-cased "Geth", keep that.
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if name == "geth" || name == "geth-testnet" {
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name = "Geth"
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}
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if c.UserIdent != "" {
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name += "/" + c.UserIdent
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}
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if c.Version != "" {
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name += "/v" + c.Version
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}
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name += "/" + runtime.GOOS + "-" + runtime.GOARCH
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name += "/" + runtime.Version()
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return name
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}
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func (c *Config) name() string {
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if c.Name == "" {
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progname := strings.TrimSuffix(filepath.Base(os.Args[0]), ".exe")
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if progname == "" {
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panic("empty executable name, set Config.Name")
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}
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return progname
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}
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return c.Name
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}
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// These resources are resolved differently for "geth" instances.
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var isOldGethResource = map[string]bool{
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"chaindata": true,
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"nodes": true,
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"nodekey": true,
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"static-nodes.json": true,
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"trusted-nodes.json": true,
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}
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// resolvePath resolves path in the instance directory.
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func (c *Config) resolvePath(path string) string {
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if filepath.IsAbs(path) {
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return path
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}
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if c.DataDir == "" {
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return ""
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}
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// Backwards-compatibility: ensure that data directory files created
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// by geth 1.4 are used if they exist.
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if c.name() == "geth" && isOldGethResource[path] {
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oldpath := ""
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if c.Name == "geth" {
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oldpath = filepath.Join(c.DataDir, path)
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}
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if oldpath != "" && common.FileExist(oldpath) {
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// TODO: print warning
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return oldpath
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}
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}
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return filepath.Join(c.instanceDir(), path)
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}
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func (c *Config) instanceDir() string {
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if c.DataDir == "" {
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return ""
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}
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return filepath.Join(c.DataDir, c.name())
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}
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// NodeKey retrieves the currently configured private key of the node, checking
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// first any manually set key, falling back to the one found in the configured
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// data folder. If no key can be found, a new one is generated.
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func (c *Config) NodeKey() *ecdsa.PrivateKey {
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// Use any specifically configured key.
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if c.P2P.PrivateKey != nil {
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return c.P2P.PrivateKey
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}
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// Generate ephemeral key if no datadir is being used.
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if c.DataDir == "" {
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key, err := crypto.GenerateKey()
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if err != nil {
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log.Crit(fmt.Sprintf("Failed to generate ephemeral node key: %v", err))
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}
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return key
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}
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keyfile := c.resolvePath(datadirPrivateKey)
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if key, err := crypto.LoadECDSA(keyfile); err == nil {
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return key
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}
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// No persistent key found, generate and store a new one.
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key, err := crypto.GenerateKey()
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if err != nil {
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log.Crit(fmt.Sprintf("Failed to generate node key: %v", err))
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}
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instanceDir := filepath.Join(c.DataDir, c.name())
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if err := os.MkdirAll(instanceDir, 0700); err != nil {
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log.Error(fmt.Sprintf("Failed to persist node key: %v", err))
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return key
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}
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keyfile = filepath.Join(instanceDir, datadirPrivateKey)
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if err := crypto.SaveECDSA(keyfile, key); err != nil {
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log.Error(fmt.Sprintf("Failed to persist node key: %v", err))
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}
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return key
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}
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// StaticNodes returns a list of node enode URLs configured as static nodes.
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func (c *Config) StaticNodes() []*discover.Node {
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return c.parsePersistentNodes(c.resolvePath(datadirStaticNodes))
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}
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// TrustedNodes returns a list of node enode URLs configured as trusted nodes.
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func (c *Config) TrustedNodes() []*discover.Node {
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return c.parsePersistentNodes(c.resolvePath(datadirTrustedNodes))
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}
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// parsePersistentNodes parses a list of discovery node URLs loaded from a .json
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// file from within the data directory.
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func (c *Config) parsePersistentNodes(path string) []*discover.Node {
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// Short circuit if no node config is present
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if c.DataDir == "" {
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return nil
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}
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if _, err := os.Stat(path); err != nil {
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return nil
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}
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// Load the nodes from the config file.
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var nodelist []string
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if err := common.LoadJSON(path, &nodelist); err != nil {
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log.Error(fmt.Sprintf("Can't load node file %s: %v", path, err))
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return nil
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}
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// Interpret the list as a discovery node array
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var nodes []*discover.Node
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for _, url := range nodelist {
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if url == "" {
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continue
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}
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node, err := discover.ParseNode(url)
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if err != nil {
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log.Error(fmt.Sprintf("Node URL %s: %v\n", url, err))
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continue
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}
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nodes = append(nodes, node)
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}
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return nodes
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}
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// AccountConfig determines the settings for scrypt and keydirectory
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func (c *Config) AccountConfig() (int, int, string, error) {
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scryptN := keystore.StandardScryptN
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scryptP := keystore.StandardScryptP
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if c.UseLightweightKDF {
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scryptN = keystore.LightScryptN
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scryptP = keystore.LightScryptP
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}
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var (
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keydir string
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err error
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)
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switch {
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case filepath.IsAbs(c.KeyStoreDir):
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keydir = c.KeyStoreDir
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case c.DataDir != "":
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if c.KeyStoreDir == "" {
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keydir = filepath.Join(c.DataDir, datadirDefaultKeyStore)
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} else {
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keydir, err = filepath.Abs(c.KeyStoreDir)
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}
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case c.KeyStoreDir != "":
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keydir, err = filepath.Abs(c.KeyStoreDir)
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}
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return scryptN, scryptP, keydir, err
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}
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func makeAccountManager(conf *Config) (*accounts.Manager, string, error) {
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scryptN, scryptP, keydir, err := conf.AccountConfig()
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var ephemeral string
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if keydir == "" {
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// There is no datadir.
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keydir, err = ioutil.TempDir("", "go-ethereum-keystore")
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ephemeral = keydir
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}
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if err != nil {
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return nil, "", err
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}
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if err := os.MkdirAll(keydir, 0700); err != nil {
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return nil, "", err
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}
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// Assemble the account manager and supported backends
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backends := []accounts.Backend{
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keystore.NewKeyStore(keydir, scryptN, scryptP),
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}
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if !conf.NoUSB {
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// Start a USB hub for Ledger hardware wallets
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if ledgerhub, err := usbwallet.NewLedgerHub(); err != nil {
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log.Warn(fmt.Sprintf("Failed to start Ledger hub, disabling: %v", err))
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} else {
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backends = append(backends, ledgerhub)
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}
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// Start a USB hub for Trezor hardware wallets
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if trezorhub, err := usbwallet.NewTrezorHub(); err != nil {
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log.Warn(fmt.Sprintf("Failed to start Trezor hub, disabling: %v", err))
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} else {
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backends = append(backends, trezorhub)
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}
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}
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return accounts.NewManager(backends...), ephemeral, nil
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}
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