ceremonyclient/go-libp2p/options.go
Cassie Heart ebb31fd792 v1.4.19
2024-06-08 11:32:45 +00:00

612 lines
20 KiB
Go

package libp2p
// This file contains all libp2p configuration options (except the defaults,
// those are in defaults.go).
import (
"crypto/rand"
"encoding/binary"
"errors"
"fmt"
"reflect"
"time"
"github.com/libp2p/go-libp2p/config"
"github.com/libp2p/go-libp2p/core/connmgr"
"github.com/libp2p/go-libp2p/core/crypto"
"github.com/libp2p/go-libp2p/core/metrics"
"github.com/libp2p/go-libp2p/core/network"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/libp2p/go-libp2p/core/peerstore"
"github.com/libp2p/go-libp2p/core/pnet"
"github.com/libp2p/go-libp2p/core/protocol"
"github.com/libp2p/go-libp2p/core/transport"
"github.com/libp2p/go-libp2p/p2p/host/autorelay"
bhost "github.com/libp2p/go-libp2p/p2p/host/basic"
"github.com/libp2p/go-libp2p/p2p/net/swarm"
tptu "github.com/libp2p/go-libp2p/p2p/net/upgrader"
relayv2 "github.com/libp2p/go-libp2p/p2p/protocol/circuitv2/relay"
"github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
"github.com/libp2p/go-libp2p/p2p/transport/quicreuse"
"github.com/prometheus/client_golang/prometheus"
ma "github.com/multiformats/go-multiaddr"
madns "github.com/multiformats/go-multiaddr-dns"
"go.uber.org/fx"
)
// ListenAddrStrings configures libp2p to listen on the given (unparsed)
// addresses.
func ListenAddrStrings(s ...string) Option {
return func(cfg *Config) error {
for _, addrstr := range s {
a, err := ma.NewMultiaddr(addrstr)
if err != nil {
return err
}
cfg.ListenAddrs = append(cfg.ListenAddrs, a)
}
return nil
}
}
// ListenAddrs configures libp2p to listen on the given addresses.
func ListenAddrs(addrs ...ma.Multiaddr) Option {
return func(cfg *Config) error {
cfg.ListenAddrs = append(cfg.ListenAddrs, addrs...)
return nil
}
}
// Security configures libp2p to use the given security transport (or transport
// constructor).
//
// Name is the protocol name.
//
// The transport can be a constructed security.Transport or a function taking
// any subset of this libp2p node's:
// * Public key
// * Private key
// * Peer ID
// * Host
// * Network
// * Peerstore
func Security(name string, constructor interface{}) Option {
return func(cfg *Config) error {
if cfg.Insecure {
return fmt.Errorf("cannot use security transports with an insecure libp2p configuration")
}
cfg.SecurityTransports = append(cfg.SecurityTransports, config.Security{ID: protocol.ID(name), Constructor: constructor})
return nil
}
}
// NoSecurity is an option that completely disables all transport security.
// It's incompatible with all other transport security protocols.
var NoSecurity Option = func(cfg *Config) error {
if len(cfg.SecurityTransports) > 0 {
return fmt.Errorf("cannot use security transports with an insecure libp2p configuration")
}
cfg.Insecure = true
return nil
}
// Muxer configures libp2p to use the given stream multiplexer.
// name is the protocol name.
func Muxer(name string, muxer network.Multiplexer) Option {
return func(cfg *Config) error {
cfg.Muxers = append(cfg.Muxers, tptu.StreamMuxer{Muxer: muxer, ID: protocol.ID(name)})
return nil
}
}
func QUICReuse(constructor interface{}, opts ...quicreuse.Option) Option {
return func(cfg *Config) error {
tag := `group:"quicreuseopts"`
typ := reflect.ValueOf(constructor).Type()
numParams := typ.NumIn()
isVariadic := typ.IsVariadic()
if !isVariadic && len(opts) > 0 {
return errors.New("QUICReuse constructor doesn't take any options")
}
var params []string
if isVariadic && len(opts) > 0 {
// If there are options, apply the tag.
// Since options are variadic, they have to be the last argument of the constructor.
params = make([]string, numParams)
params[len(params)-1] = tag
}
cfg.QUICReuse = append(cfg.QUICReuse, fx.Provide(fx.Annotate(constructor, fx.ParamTags(params...))))
for _, opt := range opts {
cfg.QUICReuse = append(cfg.QUICReuse, fx.Supply(fx.Annotate(opt, fx.ResultTags(tag))))
}
return nil
}
}
// Transport configures libp2p to use the given transport (or transport
// constructor).
//
// The transport can be a constructed transport.Transport or a function taking
// any subset of this libp2p node's:
// * Transport Upgrader (*tptu.Upgrader)
// * Host
// * Stream muxer (muxer.Transport)
// * Security transport (security.Transport)
// * Private network protector (pnet.Protector)
// * Peer ID
// * Private Key
// * Public Key
// * Address filter (filter.Filter)
// * Peerstore
func Transport(constructor interface{}, opts ...interface{}) Option {
return func(cfg *Config) error {
// generate a random identifier, so that fx can associate the constructor with its options
b := make([]byte, 8)
rand.Read(b)
id := binary.BigEndian.Uint64(b)
tag := fmt.Sprintf(`group:"transportopt_%d"`, id)
typ := reflect.ValueOf(constructor).Type()
numParams := typ.NumIn()
isVariadic := typ.IsVariadic()
if !isVariadic && len(opts) > 0 {
return errors.New("transport constructor doesn't take any options")
}
if isVariadic && numParams >= 1 {
paramType := typ.In(numParams - 1).Elem()
for _, opt := range opts {
if typ := reflect.TypeOf(opt); !typ.AssignableTo(paramType) {
return fmt.Errorf("transport option of type %s not assignable to %s", typ, paramType)
}
}
}
var params []string
if isVariadic && len(opts) > 0 {
// If there are transport options, apply the tag.
// Since options are variadic, they have to be the last argument of the constructor.
params = make([]string, numParams)
params[len(params)-1] = tag
}
cfg.Transports = append(cfg.Transports, fx.Provide(
fx.Annotate(
constructor,
fx.ParamTags(params...),
fx.As(new(transport.Transport)),
fx.ResultTags(`group:"transport"`),
),
))
for _, opt := range opts {
cfg.Transports = append(cfg.Transports, fx.Supply(
fx.Annotate(
opt,
fx.ResultTags(tag),
),
))
}
return nil
}
}
// Peerstore configures libp2p to use the given peerstore.
func Peerstore(ps peerstore.Peerstore) Option {
return func(cfg *Config) error {
if cfg.Peerstore != nil {
return fmt.Errorf("cannot specify multiple peerstore options")
}
cfg.Peerstore = ps
return nil
}
}
// PrivateNetwork configures libp2p to use the given private network protector.
func PrivateNetwork(psk pnet.PSK) Option {
return func(cfg *Config) error {
if cfg.PSK != nil {
return fmt.Errorf("cannot specify multiple private network options")
}
cfg.PSK = psk
return nil
}
}
// BandwidthReporter configures libp2p to use the given bandwidth reporter.
func BandwidthReporter(rep metrics.Reporter) Option {
return func(cfg *Config) error {
if cfg.Reporter != nil {
return fmt.Errorf("cannot specify multiple bandwidth reporter options")
}
cfg.Reporter = rep
return nil
}
}
// Identity configures libp2p to use the given private key to identify itself.
func Identity(sk crypto.PrivKey) Option {
return func(cfg *Config) error {
if cfg.PeerKey != nil {
return fmt.Errorf("cannot specify multiple identities")
}
cfg.PeerKey = sk
return nil
}
}
// ConnectionManager configures libp2p to use the given connection manager.
//
// The current "standard" connection manager lives in github.com/libp2p/go-libp2p-connmgr. See
// https://pkg.go.dev/github.com/libp2p/go-libp2p-connmgr?utm_source=godoc#NewConnManager.
func ConnectionManager(connman connmgr.ConnManager) Option {
return func(cfg *Config) error {
if cfg.ConnManager != nil {
return fmt.Errorf("cannot specify multiple connection managers")
}
cfg.ConnManager = connman
return nil
}
}
// AddrsFactory configures libp2p to use the given address factory.
func AddrsFactory(factory config.AddrsFactory) Option {
return func(cfg *Config) error {
if cfg.AddrsFactory != nil {
return fmt.Errorf("cannot specify multiple address factories")
}
cfg.AddrsFactory = factory
return nil
}
}
// EnableRelay configures libp2p to enable the relay transport.
// This option only configures libp2p to accept inbound connections from relays
// and make outbound connections_through_ relays when requested by the remote peer.
// This option supports both circuit v1 and v2 connections.
// (default: enabled)
func EnableRelay() Option {
return func(cfg *Config) error {
cfg.RelayCustom = true
cfg.Relay = true
return nil
}
}
// DisableRelay configures libp2p to disable the relay transport.
func DisableRelay() Option {
return func(cfg *Config) error {
cfg.RelayCustom = true
cfg.Relay = false
return nil
}
}
// EnableRelayService configures libp2p to run a circuit v2 relay,
// if we detect that we're publicly reachable.
func EnableRelayService(opts ...relayv2.Option) Option {
return func(cfg *Config) error {
cfg.EnableRelayService = true
cfg.RelayServiceOpts = opts
return nil
}
}
// EnableAutoRelay configures libp2p to enable the AutoRelay subsystem.
//
// Dependencies:
// - Relay (enabled by default)
// - Either:
// 1. A list of static relays
// 2. A PeerSource function that provides a chan of relays. See `autorelay.WithPeerSource`
//
// This subsystem performs automatic address rewriting to advertise relay addresses when it
// detects that the node is publicly unreachable (e.g. behind a NAT).
//
// Deprecated: Use EnableAutoRelayWithStaticRelays or EnableAutoRelayWithPeerSource
func EnableAutoRelay(opts ...autorelay.Option) Option {
return func(cfg *Config) error {
cfg.EnableAutoRelay = true
cfg.AutoRelayOpts = opts
return nil
}
}
// EnableAutoRelayWithStaticRelays configures libp2p to enable the AutoRelay subsystem using
// the provided relays as relay candidates.
// This subsystem performs automatic address rewriting to advertise relay addresses when it
// detects that the node is publicly unreachable (e.g. behind a NAT).
func EnableAutoRelayWithStaticRelays(static []peer.AddrInfo, opts ...autorelay.Option) Option {
return func(cfg *Config) error {
cfg.EnableAutoRelay = true
cfg.AutoRelayOpts = append([]autorelay.Option{autorelay.WithStaticRelays(static)}, opts...)
return nil
}
}
// EnableAutoRelayWithPeerSource configures libp2p to enable the AutoRelay
// subsystem using the provided PeerSource callback to get more relay
// candidates. This subsystem performs automatic address rewriting to advertise
// relay addresses when it detects that the node is publicly unreachable (e.g.
// behind a NAT).
func EnableAutoRelayWithPeerSource(peerSource autorelay.PeerSource, opts ...autorelay.Option) Option {
return func(cfg *Config) error {
cfg.EnableAutoRelay = true
cfg.AutoRelayOpts = append([]autorelay.Option{autorelay.WithPeerSource(peerSource)}, opts...)
return nil
}
}
// ForceReachabilityPublic overrides automatic reachability detection in the AutoNAT subsystem,
// forcing the local node to believe it is reachable externally.
func ForceReachabilityPublic() Option {
return func(cfg *Config) error {
public := network.ReachabilityPublic
cfg.AutoNATConfig.ForceReachability = &public
return nil
}
}
// ForceReachabilityPrivate overrides automatic reachability detection in the AutoNAT subsystem,
// forceing the local node to believe it is behind a NAT and not reachable externally.
func ForceReachabilityPrivate() Option {
return func(cfg *Config) error {
private := network.ReachabilityPrivate
cfg.AutoNATConfig.ForceReachability = &private
return nil
}
}
// EnableNATService configures libp2p to provide a service to peers for determining
// their reachability status. When enabled, the host will attempt to dial back
// to peers, and then tell them if it was successful in making such connections.
func EnableNATService() Option {
return func(cfg *Config) error {
cfg.AutoNATConfig.EnableService = true
return nil
}
}
// AutoNATServiceRateLimit changes the default rate limiting configured in helping
// other peers determine their reachability status. When set, the host will limit
// the number of requests it responds to in each 60 second period to the set
// numbers. A value of '0' disables throttling.
func AutoNATServiceRateLimit(global, perPeer int, interval time.Duration) Option {
return func(cfg *Config) error {
cfg.AutoNATConfig.ThrottleGlobalLimit = global
cfg.AutoNATConfig.ThrottlePeerLimit = perPeer
cfg.AutoNATConfig.ThrottleInterval = interval
return nil
}
}
// ConnectionGater configures libp2p to use the given ConnectionGater
// to actively reject inbound/outbound connections based on the lifecycle stage
// of the connection.
//
// For more information, refer to go-libp2p/core.ConnectionGater.
func ConnectionGater(cg connmgr.ConnectionGater) Option {
return func(cfg *Config) error {
if cfg.ConnectionGater != nil {
return errors.New("cannot configure multiple connection gaters, or cannot configure both Filters and ConnectionGater")
}
cfg.ConnectionGater = cg
return nil
}
}
// ResourceManager configures libp2p to use the given ResourceManager.
// When using the p2p/host/resource-manager implementation of the ResourceManager interface,
// it is recommended to set limits for libp2p protocol by calling SetDefaultServiceLimits.
func ResourceManager(rcmgr network.ResourceManager) Option {
return func(cfg *Config) error {
if cfg.ResourceManager != nil {
return errors.New("cannot configure multiple resource managers")
}
cfg.ResourceManager = rcmgr
return nil
}
}
// NATPortMap configures libp2p to use the default NATManager. The default
// NATManager will attempt to open a port in your network's firewall using UPnP.
func NATPortMap() Option {
return NATManager(bhost.NewNATManager)
}
// NATManager will configure libp2p to use the requested NATManager. This
// function should be passed a NATManager *constructor* that takes a libp2p Network.
func NATManager(nm config.NATManagerC) Option {
return func(cfg *Config) error {
if cfg.NATManager != nil {
return fmt.Errorf("cannot specify multiple NATManagers")
}
cfg.NATManager = nm
return nil
}
}
// Ping will configure libp2p to support the ping service; enable by default.
func Ping(enable bool) Option {
return func(cfg *Config) error {
cfg.DisablePing = !enable
return nil
}
}
// Routing will configure libp2p to use routing.
func Routing(rt config.RoutingC) Option {
return func(cfg *Config) error {
if cfg.Routing != nil {
return fmt.Errorf("cannot specify multiple routing options")
}
cfg.Routing = rt
return nil
}
}
// NoListenAddrs will configure libp2p to not listen by default.
//
// This will both clear any configured listen addrs and prevent libp2p from
// applying the default listen address option. It also disables relay, unless the
// user explicitly specifies with an option, as the transport creates an implicit
// listen address that would make the node dialable through any relay it was connected to.
var NoListenAddrs = func(cfg *Config) error {
cfg.ListenAddrs = []ma.Multiaddr{}
if !cfg.RelayCustom {
cfg.RelayCustom = true
cfg.Relay = false
}
return nil
}
// NoTransports will configure libp2p to not enable any transports.
//
// This will both clear any configured transports (specified in prior libp2p
// options) and prevent libp2p from applying the default transports.
var NoTransports = func(cfg *Config) error {
cfg.Transports = []fx.Option{}
return nil
}
// ProtocolVersion sets the protocolVersion string required by the
// libp2p Identify protocol.
func ProtocolVersion(s string) Option {
return func(cfg *Config) error {
cfg.ProtocolVersion = s
return nil
}
}
// UserAgent sets the libp2p user-agent sent along with the identify protocol
func UserAgent(userAgent string) Option {
return func(cfg *Config) error {
cfg.UserAgent = userAgent
return nil
}
}
// MultiaddrResolver sets the libp2p dns resolver
func MultiaddrResolver(rslv *madns.Resolver) Option {
return func(cfg *Config) error {
cfg.MultiaddrResolver = rslv
return nil
}
}
// Experimental
// EnableHolePunching enables NAT traversal by enabling NATT'd peers to both initiate and respond to hole punching attempts
// to create direct/NAT-traversed connections with other peers. (default: disabled)
//
// Dependencies:
// - Relay (enabled by default)
//
// This subsystem performs two functions:
//
// 1. On receiving an inbound Relay connection, it attempts to create a direct connection with the remote peer
// by initiating and co-ordinating a hole punch over the Relayed connection.
// 2. If a peer sees a request to co-ordinate a hole punch on an outbound Relay connection,
// it will participate in the hole-punch to create a direct connection with the remote peer.
//
// If the hole punch is successful, all new streams will thereafter be created on the hole-punched connection.
// The Relayed connection will eventually be closed after a grace period.
//
// All existing indefinite long-lived streams on the Relayed connection will have to re-opened on the hole-punched connection by the user.
// Users can make use of the `Connected`/`Disconnected` notifications emitted by the Network for this purpose.
//
// It is not mandatory but nice to also enable the `AutoRelay` option (See `EnableAutoRelay`)
// so the peer can discover and connect to Relay servers if it discovers that it is NATT'd and has private reachability via AutoNAT.
// This will then enable it to advertise Relay addresses which can be used to accept inbound Relay connections to then co-ordinate
// a hole punch.
//
// If `EnableAutoRelay` is configured and the user is confident that the peer has private reachability/is NATT'd,
// the `ForceReachabilityPrivate` option can be configured to short-circuit reachability discovery via AutoNAT
// so the peer can immediately start connecting to Relay servers.
//
// If `EnableAutoRelay` is configured, the `StaticRelays` option can be used to configure a static set of Relay servers
// for `AutoRelay` to connect to so that it does not need to discover Relay servers via Routing.
func EnableHolePunching(opts ...holepunch.Option) Option {
return func(cfg *Config) error {
cfg.EnableHolePunching = true
cfg.HolePunchingOptions = opts
return nil
}
}
func WithDialTimeout(t time.Duration) Option {
return func(cfg *Config) error {
if t <= 0 {
return errors.New("dial timeout needs to be non-negative")
}
cfg.DialTimeout = t
return nil
}
}
// DisableMetrics configures libp2p to disable prometheus metrics
func DisableMetrics() Option {
return func(cfg *Config) error {
cfg.DisableMetrics = true
return nil
}
}
// PrometheusRegisterer configures libp2p to use reg as the Registerer for all metrics subsystems
func PrometheusRegisterer(reg prometheus.Registerer) Option {
return func(cfg *Config) error {
if cfg.DisableMetrics {
return errors.New("cannot set registerer when metrics are disabled")
}
if cfg.PrometheusRegisterer != nil {
return errors.New("registerer already set")
}
if reg == nil {
return errors.New("registerer cannot be nil")
}
cfg.PrometheusRegisterer = reg
return nil
}
}
// DialRanker configures libp2p to use d as the dial ranker. To enable smart
// dialing use `swarm.DefaultDialRanker`. use `swarm.NoDelayDialRanker` to
// disable smart dialing.
//
// Deprecated: use SwarmOpts(swarm.WithDialRanker(d)) instead
func DialRanker(d network.DialRanker) Option {
return func(cfg *Config) error {
if cfg.DialRanker != nil {
return errors.New("dial ranker already configured")
}
cfg.DialRanker = d
return nil
}
}
// SwarmOpts configures libp2p to use swarm with opts
func SwarmOpts(opts ...swarm.Option) Option {
return func(cfg *Config) error {
cfg.SwarmOpts = opts
return nil
}
}
// DisableIdentifyAddressDiscovery disables address discovery using peer provided observed addresses
// in identify. If you know your public addresses upfront, the recommended way is to use
// AddressFactory to provide the external adddress to the host and use this option to disable
// discovery from identify.
func DisableIdentifyAddressDiscovery() Option {
return func(cfg *Config) error {
cfg.DisableIdentifyAddressDiscovery = true
return nil
}
}