13 "github.com/jinzhu/gorm"
14 log "github.com/sirupsen/logrus"
15 // dbm "github.com/vapor/database/leveldb"
17 vaporCfg "github.com/vapor/config"
18 "github.com/vapor/crypto/ed25519/chainkd"
19 "github.com/vapor/p2p"
20 // conn "github.com/vapor/p2p/connection"
21 // "github.com/vapor/consensus"
22 // "github.com/vapor/crypto/sha3pool"
23 "github.com/vapor/p2p/discover/dht"
24 "github.com/vapor/p2p/discover/mdns"
25 "github.com/vapor/p2p/signlib"
26 "github.com/vapor/toolbar/precog/config"
27 "github.com/vapor/toolbar/precog/database/orm"
38 nodeCfg *vaporCfg.Config
40 discvCh chan *dht.Node
44 func NewMonitor(cfg *config.Config, db *gorm.DB) *monitor {
46 cfg.CheckFreqSeconds = 1
48 nodeCfg := &vaporCfg.Config{
49 BaseConfig: vaporCfg.DefaultBaseConfig(),
50 P2P: vaporCfg.DefaultP2PConfig(),
51 Federation: vaporCfg.DefaultFederationConfig(),
53 nodeCfg.DBPath = "vapor_precog_data"
54 nodeCfg.ChainID = "mainnet"
55 discvCh := make(chan *dht.Node)
56 privKey, err := signlib.NewPrivKey()
66 privKey: privKey.(chainkd.XPrv),
70 func (m *monitor) Run() {
71 defer os.RemoveAll(m.nodeCfg.DBPath)
74 for _, node := range m.cfg.Nodes {
75 seeds = append(seeds, fmt.Sprintf("%s:%d", node.Host, node.Port))
76 if err := m.upSertNode(&node); err != nil {
80 m.nodeCfg.P2P.Seeds = strings.Join(seeds, ",")
81 if err := m.makeSwitch(); err != nil {
85 go m.discoveryRoutine()
86 go m.collectDiscoveredNodes()
87 go m.connectNodesRoutine()
90 // create or update: https://github.com/jinzhu/gorm/issues/1307
91 func (m *monitor) upSertNode(node *config.Node) error {
93 node.PublicKey = fmt.Sprintf("%v", node.XPub.PublicKey().String())
96 ormNode := &orm.Node{PublicKey: node.PublicKey}
97 if err := m.db.Where(&orm.Node{PublicKey: node.PublicKey}).First(ormNode).Error; err != nil && err != gorm.ErrRecordNotFound {
101 if node.Alias != "" {
102 ormNode.Alias = node.Alias
104 if node.XPub != nil {
105 ormNode.Xpub = node.XPub.String()
107 ormNode.Host = node.Host
108 ormNode.Port = node.Port
109 return m.db.Where(&orm.Node{PublicKey: ormNode.PublicKey}).
112 Alias: ormNode.Alias,
115 }).FirstOrCreate(ormNode).Error
118 func (m *monitor) makeSwitch() error {
119 l, listenAddr := p2p.GetListener(m.nodeCfg.P2P)
120 discv, err := dht.NewDiscover(m.nodeCfg, m.privKey, l.ExternalAddress().Port, m.cfg.NetworkID)
125 // no need for lanDiscv, but passing &mdns.LANDiscover{} will cause NilPointer
126 lanDiscv := mdns.NewLANDiscover(mdns.NewProtocol(), int(l.ExternalAddress().Port))
127 sw, err := p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, m.privKey, listenAddr, m.cfg.NetworkID)
136 func (m *monitor) discoveryRoutine() {
137 ticker := time.NewTicker(time.Duration(discvFreqSec) * time.Second)
139 nodes := make([]*dht.Node, nodesToDiscv)
140 n := m.sw.GetDiscv().ReadRandomNodes(nodes)
141 for i := 0; i < n; i++ {
142 m.discvCh <- nodes[i]
147 func (m *monitor) collectDiscoveredNodes() {
148 // nodeMap maps a node's public key to the node itself
149 nodeMap := make(map[string]*dht.Node)
150 for node := range m.discvCh {
151 if n, ok := nodeMap[node.ID.String()]; ok && n.String() == node.String() {
154 log.Info("discover new node: ", node)
156 if err := m.upSertNode(&config.Node{
157 PublicKey: node.ID.String(),
158 Host: node.IP.String(),
164 nodeMap[node.ID.String()] = node
168 func (m *monitor) connectNodesRoutine() {
169 ticker := time.NewTicker(time.Duration(m.cfg.CheckFreqSeconds) * time.Second)
170 for ; true; <-ticker.C {
172 if err := m.dialNodes(); err != nil {
178 func (m *monitor) dialNodes() error {
179 var nodes []*orm.Node
180 if err := m.db.Model(&orm.Node{}).Find(&nodes).Error; err != nil {
184 addresses := make([]*p2p.NetAddress, 0)
185 for i := 0; i < len(nodes); i++ {
186 ips, err := net.LookupIP(nodes[i].Host)
192 log.Error("fail to look up ip")
196 address := p2p.NewNetAddressIPPort(ips[0], nodes[i].Port)
197 addresses = append(addresses, address)
200 m.sw.DialPeers(addresses)
205 // implement logic first, and then refactor
206 // /home/gavin/work/go/src/github.com/vapor/
208 // p2p/switch_test.go
212 // TODO: dial nodes, get lantency & best_height
213 // TODO: decide check_height("best best_height" - "confirmations")
214 // TODO: get blockhash by check_height, get latency
215 // TODO: update lantency, active_time and status