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 {
45 nodeCfg := &vaporCfg.Config{
46 BaseConfig: vaporCfg.DefaultBaseConfig(),
47 P2P: vaporCfg.DefaultP2PConfig(),
48 Federation: vaporCfg.DefaultFederationConfig(),
50 nodeCfg.DBPath = "vapor_precog_data"
51 nodeCfg.ChainID = "mainnet"
52 discvCh := make(chan *dht.Node)
53 privKey, err := signlib.NewPrivKey()
63 privKey: privKey.(chainkd.XPrv),
67 func (m *monitor) Run() {
68 defer os.RemoveAll(m.nodeCfg.DBPath)
70 for _, node := range m.cfg.Nodes {
74 sw, err := m.makeSwitch()
84 ticker := time.NewTicker(time.Duration(m.cfg.CheckFreqSeconds) * time.Second)
85 for ; true; <-ticker.C {
91 // create or update: https://github.com/jinzhu/gorm/issues/1307
92 func (m *monitor) upSertNode(node *config.Node) error {
94 node.PublicKey = fmt.Sprintf("%v", node.XPub.PublicKey().String())
97 ormNode := &orm.Node{PublicKey: node.PublicKey}
98 if err := m.db.Where(&orm.Node{PublicKey: node.PublicKey}).First(ormNode).Error; err != nil && err != gorm.ErrRecordNotFound {
102 if node.Alias != "" {
103 ormNode.Alias = node.Alias
105 if node.XPub != nil {
106 ormNode.Xpub = node.XPub.String()
108 ormNode.Host = node.Host
109 ormNode.Port = node.Port
110 return m.db.Where(&orm.Node{PublicKey: ormNode.PublicKey}).
113 Alias: ormNode.Alias,
116 }).FirstOrCreate(ormNode).Error
119 func (m *monitor) makeSwitch() (*p2p.Switch, error) {
120 l, listenAddr := p2p.GetListener(m.nodeCfg.P2P)
121 discv, err := dht.NewDiscover(m.nodeCfg, m.privKey, l.ExternalAddress().Port, m.cfg.NetworkID)
126 // no need for lanDiscv, but passing &mdns.LANDiscover{} will cause NilPointer
127 lanDiscv := mdns.NewLANDiscover(mdns.NewProtocol(), int(l.ExternalAddress().Port))
128 return p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, m.privKey, listenAddr, m.cfg.NetworkID)
131 func (m *monitor) discovery() {
132 ticker := time.NewTicker(time.Duration(discvFreqSec) * time.Second)
134 nodes := make([]*dht.Node, nodesToDiscv)
135 n := m.sw.GetDiscv().ReadRandomNodes(nodes)
136 for i := 0; i < n; i++ {
137 m.discvCh <- nodes[i]
142 func (m *monitor) collectDiscv() {
143 // nodeMap maps a node's public key to the node itself
144 nodeMap := make(map[string]*dht.Node)
145 for node := range m.discvCh {
146 if n, ok := nodeMap[node.ID.String()]; ok && n.String() == node.String() {
149 log.Info("discover new node: ", node)
151 m.upSertNode(&config.Node{
152 PublicKey: node.ID.String(),
153 Host: node.IP.String(),
156 nodeMap[node.ID.String()] = node
160 func (m *monitor) monitorRountine() error {
161 var nodes []*orm.Node
162 if err := m.db.Model(&orm.Node{}).Find(&nodes).Error; err != nil {
166 addresses := make([]*p2p.NetAddress, 0)
167 for i := 0; i < len(nodes); i++ {
168 ip, err := net.LookupIP(nodes[i].Host)
169 if err != nil || len(ip) == 0 {
173 address := p2p.NewNetAddressIPPort(ip[0], nodes[i].Port)
174 addresses = append(addresses, address)
177 m.sw.DialPeers(addresses)
179 // TODO: dail nodes, get lantency & best_height
180 // TODO: decide check_height("best best_height" - "confirmations")
181 // TODO: get blockhash by check_height, get latency
182 // TODO: update lantency, active_time and status
187 // implement logic first, and then refactor
188 // /home/gavin/work/go/src/github.com/vapor/
190 // p2p/switch_test.go