node

package
v0.3.9 Latest Latest
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 Go to latest Published: Oct 28, 2020 License: LGPL-3.0 Imports: 30 Imported by: 18

Documentation

Index

Constants

View Source 
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
)

Variables

View Source 
var (
	ErrDatadirUsed    = errors.New("datadir already used by another process")
	ErrNodeStopped    = errors.New("node not started")
	ErrNodeRunning    = errors.New("node already running")
	ErrServiceUnknown = errors.New("unknown service")
)
View Source 
var DefaultConfig = Config{
	DataDir:             DefaultDataDir(),
	HTTPPort:            DefaultHTTPPort,
	HTTPModules:         []string{"net", "web3"},
	HTTPVirtualHosts:    []string{"localhost"},
	HTTPTimeouts:        rpc.DefaultHTTPTimeouts,
	WSPort:              DefaultWSPort,
	WSModules:           []string{"net", "web3"},
	GraphQLVirtualHosts: []string{"localhost"},
	P2P: p2p.Config{
		ListenAddr: ":30303",
		MaxPeers:   50,
		NAT:        nat.Any(),
	},
}

DefaultConfig contains reasonable default settings.

Functions

func DefaultDataDir 

func DefaultDataDir() string

DefaultDataDir is the default data directory to use for the databases and other persistence requirements.

func DefaultHTTPEndpoint 

func DefaultHTTPEndpoint() string

DefaultHTTPEndpoint returns the HTTP endpoint used by default.

func DefaultIPCEndpoint 

func DefaultIPCEndpoint(clientIdentifier string) string

DefaultIPCEndpoint returns the IPC path used by default.

func DefaultWSEndpoint 

func DefaultWSEndpoint() string

DefaultWSEndpoint returns the websocket endpoint used by default.

Types

type Config 

type Config struct {
	// Name sets the instance name of the node. It must not contain the / character and is
	// used in the devp2p node identifier. The instance name of geth is "geth". If no
	// value is specified, the basename of the current executable is used.
	Name string `toml:"-"`

	// UserIdent, if set, is used as an additional component in the devp2p node identifier.
	UserIdent string `toml:",omitempty"`

	// Version should be set to the version number of the program. It is used
	// in the devp2p node identifier.
	Version string `toml:"-"`

	// DataDir is the file system folder the node should use for any data storage
	// requirements. The configured data directory will not be directly shared with
	// registered services, instead those can use utility methods to create/access
	// databases or flat files. This enables ephemeral nodes which can fully reside
	// in memory.
	DataDir string

	// Configuration of peer-to-peer networking.
	P2P p2p.Config

	// KeyStoreDir is the file system folder that contains private keys. The directory can
	// be specified as a relative path, in which case it is resolved relative to the
	// current directory.
	//
	// If KeyStoreDir is empty, the default location is the "keystore" subdirectory of
	// DataDir. If DataDir is unspecified and KeyStoreDir is empty, an ephemeral directory
	// is created by New and destroyed when the node is stopped.
	KeyStoreDir string `toml:",omitempty"`

	// ExternalSigner specifies an external URI for a clef-type signer
	ExternalSigner string `toml:",omitempty"`

	// UseLightweightKDF lowers the memory and CPU requirements of the key store
	// scrypt KDF at the expense of security.
	UseLightweightKDF bool `toml:",omitempty"`

	// InsecureUnlockAllowed allows user to unlock accounts in unsafe http environment.
	InsecureUnlockAllowed bool `toml:",omitempty"`

	// NoUSB disables hardware wallet monitoring and connectivity.
	NoUSB bool `toml:",omitempty"`

	// SmartCardDaemonPath is the path to the smartcard daemon's socket
	SmartCardDaemonPath string `toml:",omitempty"`

	// IPCPath is the requested location to place the IPC endpoint. If the path is
	// a simple file name, it is placed inside the data directory (or on the root
	// pipe path on Windows), whereas if it's a resolvable path name (absolute or
	// relative), then that specific path is enforced. An empty path disables IPC.
	IPCPath string

	// HTTPHost is the host interface on which to start the HTTP RPC server. If this
	// field is empty, no HTTP API endpoint will be started.
	HTTPHost string

	// HTTPPort is the TCP port number on which to start the HTTP RPC server. The
	// default zero value is/ valid and will pick a port number randomly (useful
	// for ephemeral nodes).
	HTTPPort int `toml:",omitempty"`

	// HTTPCors is the Cross-Origin Resource Sharing header to send to requesting
	// clients. Please be aware that CORS is a browser enforced security, it's fully
	// useless for custom HTTP clients.
	HTTPCors []string `toml:",omitempty"`

	// HTTPVirtualHosts is the list of virtual hostnames which are allowed on incoming requests.
	// This is by default {'localhost'}. Using this prevents attacks like
	// DNS rebinding, which bypasses SOP by simply masquerading as being within the same
	// origin. These attacks do not utilize CORS, since they are not cross-domain.
	// By explicitly checking the Host-header, the server will not allow requests
	// made against the server with a malicious host domain.
	// Requests using ip address directly are not affected
	HTTPVirtualHosts []string `toml:",omitempty"`

	// HTTPModules is a list of API modules to expose via the HTTP RPC interface.
	// If the module list is empty, all RPC API endpoints designated public will be
	// exposed.
	HTTPModules []string

	// HTTPTimeouts allows for customization of the timeout values used by the HTTP RPC
	// interface.
	HTTPTimeouts rpc.HTTPTimeouts

	// WSHost is the host interface on which to start the websocket RPC server. If
	// this field is empty, no websocket API endpoint will be started.
	WSHost string

	// WSPort is the TCP port number on which to start the websocket RPC server. The
	// default zero value is/ valid and will pick a port number randomly (useful for
	// ephemeral nodes).
	WSPort int `toml:",omitempty"`

	// WSOrigins is the list of domain to accept websocket requests from. Please be
	// aware that the server can only act upon the HTTP request the client sends and
	// cannot verify the validity of the request header.
	WSOrigins []string `toml:",omitempty"`

	// WSModules is a list of API modules to expose via the websocket RPC interface.
	// If the module list is empty, all RPC API endpoints designated public will be
	// exposed.
	WSModules []string

	// WSExposeAll exposes all API modules via the WebSocket RPC interface rather
	// than just the public ones.
	//
	// *WARNING* Only set this if the node is running in a trusted network, exposing
	// private APIs to untrusted users is a major security risk.
	WSExposeAll bool `toml:",omitempty"`

	// GraphQLCors is the Cross-Origin Resource Sharing header to send to requesting
	// clients. Please be aware that CORS is a browser enforced security, it's fully
	// useless for custom HTTP clients.
	GraphQLCors []string `toml:",omitempty"`

	// GraphQLVirtualHosts is the list of virtual hostnames which are allowed on incoming requests.
	// This is by default {'localhost'}. Using this prevents attacks like
	// DNS rebinding, which bypasses SOP by simply masquerading as being within the same
	// origin. These attacks do not utilize CORS, since they are not cross-domain.
	// By explicitly checking the Host-header, the server will not allow requests
	// made against the server with a malicious host domain.
	// Requests using ip address directly are not affected
	GraphQLVirtualHosts []string `toml:",omitempty"`

	// Logger is a custom logger to use with the p2p.Server.
	Logger log.Logger `toml:",omitempty"`
	// contains filtered or unexported fields
}

Config represents a small collection of configuration values to fine tune the P2P network layer of a protocol stack. These values can be further extended by all registered services.

func (*Config) AccountConfig 

func (c *Config) AccountConfig() (int, int, string, error)

AccountConfig determines the settings for scrypt and keydirectory

func (*Config) ExtRPCEnabled 

func (c *Config) ExtRPCEnabled() bool

ExtRPCEnabled returns the indicator whether node enables the external RPC(http, ws or graphql).

func (*Config) HTTPEndpoint 

func (c *Config) HTTPEndpoint() string

HTTPEndpoint resolves an HTTP endpoint based on the configured host interface and port parameters.

func (*Config) IPCEndpoint 

func (c *Config) IPCEndpoint() string

IPCEndpoint resolves an IPC endpoint based on a configured value, taking into account the set data folders as well as the designated platform we're currently running on.

func (*Config) NodeDB 

func (c *Config) NodeDB() string

NodeDB returns the path to the discovery node database.

func (*Config) NodeKey 

func (c *Config) NodeKey() *ecdsa.PrivateKey

NodeKey retrieves the currently configured private key of the node, checking first any manually set key, falling back to the one found in the configured data folder. If no key can be found, a new one is generated.

func (*Config) NodeName 

func (c *Config) NodeName() string

NodeName returns the devp2p node identifier.

func (*Config) ResolvePath 

func (c *Config) ResolvePath(path string) string

ResolvePath resolves path in the instance directory.

func (*Config) StaticNodes 

func (c *Config) StaticNodes() []*enode.Node

StaticNodes returns a list of node enode URLs configured as static nodes.

func (*Config) TrustedNodes 

func (c *Config) TrustedNodes() []*enode.Node

TrustedNodes returns a list of node enode URLs configured as trusted nodes.

func (*Config) WSEndpoint 

func (c *Config) WSEndpoint() string

WSEndpoint resolves a websocket endpoint based on the configured host interface and port parameters.

type Node 

type Node struct {
	// contains filtered or unexported fields
}

Node is a container on which services can be registered.

func New 

func New(conf *Config) (*Node, error)

New creates a new P2P node, ready for protocol registration.

func (*Node) AccountManager 

func (n *Node) AccountManager() *accounts.Manager

AccountManager retrieves the account manager used by the protocol stack.

func (*Node) Config 

func (n *Node) Config() *Config

Config returns the configuration of node.

func (*Node) DataDir 

func (n *Node) DataDir() string

DataDir retrieves the current datadir used by the protocol stack. Deprecated: No files should be stored in this directory, use InstanceDir instead.

func (*Node) EventMux 

func (n *Node) EventMux() *event.TypeMux

EventMux retrieves the event multiplexer used by all the network services in the current protocol stack.

func (*Node) InstanceDir 

func (n *Node) InstanceDir() string

InstanceDir retrieves the instance directory used by the protocol stack.

func (*Node) OpenDatabase 

func (n *Node) OpenDatabase(name string, cache, handles int, namespace string) (ethdb.Database, error)

OpenDatabase opens an existing database with the given name (or creates one if no previous can be found) from within the node's instance directory. If the node is ephemeral, a memory database is returned.

func (*Node) OpenDatabaseWithFreezer 

func (n *Node) OpenDatabaseWithFreezer(name string, cache, handles int, freezer, namespace string) (ethdb.Database, error)

OpenDatabaseWithFreezer opens an existing database with the given name (or creates one if no previous can be found) from within the node's data directory, also attaching a chain freezer to it that moves ancient chain data from the database to immutable append-only files. If the node is an ephemeral one, a memory database is returned.

func (*Node) RegisterAPIs added in v0.3.1 

func (n *Node) RegisterAPIs(apis []rpc.API)

RegisterAPIs registers the APIs a service provides on the node.

func (*Node) ResolvePath 

func (n *Node) ResolvePath(x string) string

ResolvePath returns the absolute path of a resource in the instance directory.

func (*Node) Server 

func (n *Node) Server() *p2p.Server

Server retrieves the currently running P2P network layer. This method is meant only to inspect fields of the currently running server. Callers should not start or stop the returned server.

type StopError 

type StopError struct {
	Server   error
	Services map[reflect.Type]error
}

StopError is returned if a Node fails to stop either any of its registered services or itself.

func (*StopError) Error 

func (e *StopError) Error() string

Error generates a textual representation of the stop error.

Source Files

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