package monitor
import (
+ // "encoding/binary"
+ // "encoding/hex"
+ // "io/ioutil"
+ "fmt"
+ "net"
+ "os"
+ // "strings"
+ "time"
+
"github.com/jinzhu/gorm"
+ log "github.com/sirupsen/logrus"
+ // dbm "github.com/vapor/database/leveldb"
+
+ vaporCfg "github.com/vapor/config"
+ "github.com/vapor/crypto/ed25519/chainkd"
+ "github.com/vapor/p2p"
+ // conn "github.com/vapor/p2p/connection"
+ // "github.com/vapor/consensus"
+ // "github.com/vapor/crypto/sha3pool"
+ "github.com/vapor/p2p/discover/dht"
+ "github.com/vapor/p2p/discover/mdns"
+ "github.com/vapor/p2p/signlib"
+ "github.com/vapor/toolbar/precog/config"
+ "github.com/vapor/toolbar/precog/database/orm"
+)
+
+var (
+ nodesToDiscv = 150
+ discvFreqSec = 1
)
type monitor struct {
- db *gorm.DB
+ cfg *config.Config
+ db *gorm.DB
+ nodeCfg *vaporCfg.Config
+ sw *p2p.Switch
+ discvCh chan *dht.Node
+ privKey chainkd.XPrv
}
-func NewMonitor(db *gorm.DB) *monitor {
- return &monitor{db: db}
+func NewMonitor(cfg *config.Config, db *gorm.DB) *monitor {
+ nodeCfg := &vaporCfg.Config{
+ BaseConfig: vaporCfg.DefaultBaseConfig(),
+ P2P: vaporCfg.DefaultP2PConfig(),
+ Federation: vaporCfg.DefaultFederationConfig(),
+ }
+ nodeCfg.DBPath = "vapor_precog_data"
+ nodeCfg.ChainID = "mainnet"
+ discvCh := make(chan *dht.Node)
+ privKey, err := signlib.NewPrivKey()
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ return &monitor{
+ cfg: cfg,
+ db: db,
+ nodeCfg: nodeCfg,
+ discvCh: discvCh,
+ privKey: privKey.(chainkd.XPrv),
+ }
}
-func (s *monitor) Run() {
+func (m *monitor) Run() {
+ defer os.RemoveAll(m.nodeCfg.DBPath)
+
+ for _, node := range m.cfg.Nodes {
+ m.upSertNode(&node)
+ }
+
+ sw, err := m.makeSwitch()
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ m.sw = sw
+
+ go m.discovery()
+ go m.collectDiscv()
+ go m.dialRoutine()
}
+
+// create or update: https://github.com/jinzhu/gorm/issues/1307
+func (m *monitor) upSertNode(node *config.Node) error {
+ if node.XPub != nil {
+ node.PublicKey = fmt.Sprintf("%v", node.XPub.PublicKey().String())
+ }
+
+ ormNode := &orm.Node{PublicKey: node.PublicKey}
+ if err := m.db.Where(&orm.Node{PublicKey: node.PublicKey}).First(ormNode).Error; err != nil && err != gorm.ErrRecordNotFound {
+ return err
+ }
+
+ if node.Alias != "" {
+ ormNode.Alias = node.Alias
+ }
+ if node.XPub != nil {
+ ormNode.Xpub = node.XPub.String()
+ }
+ ormNode.Host = node.Host
+ ormNode.Port = node.Port
+ return m.db.Where(&orm.Node{PublicKey: ormNode.PublicKey}).
+ Assign(&orm.Node{
+ Xpub: ormNode.Xpub,
+ Alias: ormNode.Alias,
+ Host: ormNode.Host,
+ Port: ormNode.Port,
+ }).FirstOrCreate(ormNode).Error
+}
+
+func (m *monitor) makeSwitch() (*p2p.Switch, error) {
+ l, listenAddr := p2p.GetListener(m.nodeCfg.P2P)
+ discv, err := dht.NewDiscover(m.nodeCfg, m.privKey, l.ExternalAddress().Port, m.cfg.NetworkID)
+ if err != nil {
+ return nil, err
+ }
+
+ // no need for lanDiscv, but passing &mdns.LANDiscover{} will cause NilPointer
+ lanDiscv := mdns.NewLANDiscover(mdns.NewProtocol(), int(l.ExternalAddress().Port))
+ return p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, m.privKey, listenAddr, m.cfg.NetworkID)
+}
+
+func (m *monitor) discovery() {
+ ticker := time.NewTicker(time.Duration(discvFreqSec) * time.Second)
+ for range ticker.C {
+ nodes := make([]*dht.Node, nodesToDiscv)
+ n := m.sw.GetDiscv().ReadRandomNodes(nodes)
+ for i := 0; i < n; i++ {
+ m.discvCh <- nodes[i]
+ }
+ }
+}
+
+func (m *monitor) collectDiscv() {
+ // nodeMap maps a node's public key to the node itself
+ nodeMap := make(map[string]*dht.Node)
+ for node := range m.discvCh {
+ if n, ok := nodeMap[node.ID.String()]; ok && n.String() == node.String() {
+ continue
+ }
+ log.Info("discover new node: ", node)
+
+ m.upSertNode(&config.Node{
+ PublicKey: node.ID.String(),
+ Host: node.IP.String(),
+ Port: node.TCP,
+ })
+ nodeMap[node.ID.String()] = node
+ }
+}
+
+func (m *monitor) dialRoutine() {
+ // TODO: rm hardcode
+ m.cfg.CheckFreqSeconds = 60
+ ticker := time.NewTicker(time.Duration(m.cfg.CheckFreqSeconds) * time.Second)
+ for ; true; <-ticker.C {
+ m.dialNodes()
+ }
+}
+
+func (m *monitor) dialNodes() {
+ var nodes []*orm.Node
+ if err := m.db.Model(&orm.Node{}).Find(&nodes).Error; err != nil {
+ log.Error(err)
+ return
+ }
+
+ addresses := make([]*p2p.NetAddress, 0)
+ for i := 0; i < len(nodes); i++ {
+ ip, err := net.LookupIP(nodes[i].Host)
+ if err != nil || len(ip) == 0 {
+ continue
+ }
+
+ address := p2p.NewNetAddressIPPort(ip[0], nodes[i].Port)
+ addresses = append(addresses, address)
+ }
+
+ m.sw.DialPeers(addresses)
+}
+
+// TODO:
+// implement logic first, and then refactor
+// /home/gavin/work/go/src/github.com/vapor/
+// p2p/test_util.go
+// p2p/switch_test.go
+// syncManager
+// notificationMgr
+// TODO: dail nodes, get lantency & best_height
+// TODO: decide check_height("best best_height" - "confirmations")
+// TODO: get blockhash by check_height, get latency
+// TODO: update lantency, active_time and status
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