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upgrade.go
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upgrade.go
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package p2p
import (
"context"
"errors"
"fmt"
"sync"
"time"
lp2plog "github.com/ipfs/go-log/v2"
"github.com/libp2p/go-libp2p/core/host"
"github.com/libp2p/go-libp2p/core/network"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/libp2p/go-libp2p/core/protocol"
"go.uber.org/zap/zapcore"
"golang.org/x/sync/errgroup"
"github.com/spacemeshos/go-spacemesh/log"
discovery "github.com/spacemeshos/go-spacemesh/p2p/dhtdiscovery"
"github.com/spacemeshos/go-spacemesh/p2p/pubsub"
)
// Opt is for configuring Host.
type Opt func(fh *Host)
// WithLog configures logger for Host.
func WithLog(logger log.Log) Opt {
return func(fh *Host) {
fh.logger = logger
}
}
// WithConfig sets Config for Host.
func WithConfig(cfg Config) Opt {
return func(fh *Host) {
fh.cfg = cfg
}
}
// WithContext set context for Host.
func WithContext(ctx context.Context) Opt {
return func(fh *Host) {
fh.ctx = ctx
}
}
// WithNodeReporter updates reporter that is notified every time when
// node added or removed a peer.
func WithNodeReporter(reporter func()) Opt {
return func(fh *Host) {
fh.nodeReporter = reporter
}
}
func WithDirectNodes(direct map[peer.ID]struct{}) Opt {
return func(fh *Host) {
fh.direct = direct
}
}
func WithBootnodes(bootnodes map[peer.ID]struct{}) Opt {
return func(fh *Host) {
fh.bootnode = bootnodes
}
}
// Host is a conveniency wrapper for all p2p related functionality required to run
// a full spacemesh node.
type Host struct {
eg errgroup.Group
ctx context.Context
cancel context.CancelFunc
cfg Config
logger log.Log
closed struct {
sync.Mutex
closed bool
}
host.Host
*pubsub.PubSub
nodeReporter func()
discovery *discovery.Discovery
direct, bootnode map[peer.ID]struct{}
}
// Upgrade creates Host instance from host.Host.
func Upgrade(h host.Host, opts ...Opt) (*Host, error) {
ctx, cancel := context.WithCancel(context.Background())
fh := &Host{
ctx: ctx,
cancel: cancel,
cfg: DefaultConfig(),
logger: log.NewNop(),
Host: h,
}
for _, opt := range opts {
opt(fh)
}
cfg := fh.cfg
bootnodes, err := parseIntoAddr(fh.cfg.Bootnodes)
if err != nil {
return nil, err
}
direct, err := parseIntoAddr(fh.cfg.Direct)
if err != nil {
return nil, err
}
for _, peer := range direct {
h.ConnManager().Protect(peer.ID, "direct")
}
if fh.PubSub, err = pubsub.New(fh.ctx, fh.logger, h, pubsub.Config{
Flood: cfg.Flood,
IsBootnode: cfg.Bootnode,
Direct: direct,
Bootnodes: bootnodes,
MaxMessageSize: cfg.MaxMessageSize,
QueueSize: cfg.GossipQueueSize,
Throttle: cfg.GossipValidationThrottle,
}); err != nil {
return nil, fmt.Errorf("failed to initialize pubsub: %w", err)
}
dopts := []discovery.Opt{
discovery.WithMinPeers(cfg.MinPeers),
discovery.WithHighPeers(cfg.HighPeers),
discovery.WithDir(cfg.DataDir),
discovery.WithBootnodes(bootnodes),
discovery.WithLogger(fh.logger.Zap()),
}
if cfg.PrivateNetwork {
dopts = append(dopts, discovery.Private())
}
if cfg.DisableDHT {
dopts = append(dopts, discovery.DisableDHT())
}
if cfg.Bootnode {
dopts = append(dopts, discovery.Server())
} else {
backup, err := loadPeers(cfg.DataDir)
if err != nil {
fh.logger.With().Warning("failed to to load backup peers", log.Err(err))
} else if len(backup) > 0 {
dopts = append(dopts, discovery.WithBackup(backup))
}
}
dhtdisc, err := discovery.New(fh, dopts...)
if err != nil {
return nil, err
}
fh.discovery = dhtdisc
if fh.nodeReporter != nil {
fh.Network().Notify(&network.NotifyBundle{
ConnectedF: func(network.Network, network.Conn) {
fh.nodeReporter()
},
DisconnectedF: func(network.Network, network.Conn) {
fh.nodeReporter()
},
})
}
return fh, nil
}
// GetPeers returns connected peers.
func (fh *Host) GetPeers() []Peer {
return fh.Host.Network().Peers()
}
func (fh *Host) Connected(p Peer) bool {
return fh.Host.Network().Connectedness(p) == network.Connected
}
// ConnectedPeerInfo retrieves a peer info object for the given peer.ID, if the
// given peer is not connected then nil is returned.
func (fh *Host) ConnectedPeerInfo(id peer.ID) *PeerInfo {
conns := fh.Network().ConnsToPeer(id)
// there's no sync between Peers() and ConnsToPeer() so by the time we
// try to get the conns they may not exist.
if len(conns) == 0 {
return nil
}
var connections []ConnectionInfo
for _, c := range conns {
connections = append(connections, ConnectionInfo{
Address: c.RemoteMultiaddr(),
Uptime: time.Since(c.Stat().Opened),
Outbound: c.Stat().Direction == network.DirOutbound,
})
}
var tags []string
if _, ok := fh.direct[id]; ok {
tags = append(tags, "direct")
}
if _, ok := fh.bootnode[id]; ok {
tags = append(tags, "bootnode")
}
return &PeerInfo{
ID: id,
Connections: connections,
Tags: tags,
}
}
// PeerCount returns number of connected peers.
func (fh *Host) PeerCount() uint64 {
return uint64(len(fh.Host.Network().Peers()))
}
// PeerProtocols returns the protocols supported by peer.
func (fh *Host) PeerProtocols(p Peer) ([]protocol.ID, error) {
return fh.Peerstore().GetProtocols(p)
}
func (fh *Host) Start() error {
fh.closed.Lock()
defer fh.closed.Unlock()
if fh.closed.closed {
return errors.New("p2p: closed")
}
fh.discovery.Start()
if !fh.cfg.Bootnode {
fh.eg.Go(func() error {
persist(fh.ctx, fh.logger, fh.Host, fh.cfg.DataDir, 30*time.Minute)
return nil
})
}
return nil
}
// Stop background workers and release external resources.
func (fh *Host) Stop() error {
fh.closed.Lock()
defer fh.closed.Unlock()
if fh.closed.closed {
return errors.New("p2p: closed")
}
fh.cancel()
fh.closed.closed = true
fh.discovery.Stop()
fh.eg.Wait()
if err := fh.Host.Close(); err != nil {
return fmt.Errorf("failed to close libp2p host: %w", err)
}
lp2plog.SetPrimaryCore(zapcore.NewNopCore())
return nil
}