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dosnode.go
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dosnode.go
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package dosnode
import (
"context"
"fmt"
"io/ioutil"
"math/big"
"net/http"
"os"
"strconv"
"strings"
"sync"
"time"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/DOSNetwork/core/configuration"
"github.com/DOSNetwork/core/log"
"github.com/DOSNetwork/core/onchain"
"github.com/DOSNetwork/core/p2p"
"github.com/DOSNetwork/core/share/dkg/pedersen"
"github.com/DOSNetwork/core/share/vss/pedersen"
"github.com/DOSNetwork/core/suites"
errors "golang.org/x/xerrors"
)
const (
envPassPhrase = "PASSPHRASE"
)
const bootStr = `
██████╗ ██████╗ ███████╗ ███╗ ██╗███████╗████████╗██╗ ██╗ ██████╗ ██████╗ ██╗ ██╗
██╔══██╗██╔═══██╗██╔════╝ ████╗ ██║██╔════╝╚══██╔══╝██║ ██║██╔═══██╗██╔══██╗██║ ██╔╝
██║ ██║██║ ██║███████╗ ██╔██╗ ██║█████╗ ██║ ██║ █╗ ██║██║ ██║██████╔╝█████╔╝
██║ ██║██║ ██║╚════██║ ██║╚██╗██║██╔══╝ ██║ ██║███╗██║██║ ██║██╔══██╗██╔═██╗
██████╔╝╚██████╔╝███████║ ██║ ╚████║███████╗ ██║ ╚███╔███╔╝╚██████╔╝██║ ██║██║ ██╗
╚═════╝ ╚═════╝ ╚══════╝ ╚═╝ ╚═══╝╚══════╝ ╚═╝ ╚══╝╚══╝ ╚═════╝ ╚═╝ ╚═╝╚═╝ ╚═╝
`
type ctxKey string
// DosNode is a strcut that represents a offchain dos client
type DosNode struct {
ctx context.Context
cancel context.CancelFunc
suite suites.Suite
chain onchain.ProxyAdapter
dkg dkg.PDKGInterface
p p2p.P2PInterface
bootStrapIPs []string
done chan interface{}
reqSignc chan request
cRequestDone chan [4]*big.Int
onchainEvent chan interface{}
id []byte
logger log.Logger
isGuardian bool
isAdmin bool
config *configuration.Config
m sync.Mutex
//For REST API
startTime time.Time
state string
totalQuery int
fulfilledQuery int
numOfworkingGroup int
}
type request struct {
ctx context.Context
requestID string
threshold int
reply chan *vss.Signature
}
type crDurations struct {
cid *big.Int
startBlock *big.Int
commitDur *big.Int
revealDur *big.Int
sec *big.Int
}
//NewDosNode creates a DosNode struct
func NewDosNode(key *keystore.Key, config *configuration.Config) (dosNode *DosNode, err error) {
id := key.Address
l := log.New("module", "dosclient")
//Set up an onchain adapter
chainConn, err := onchain.NewProxyAdapter(key, config)
if err != nil {
if err.Error() != "No any working eth client for event tracking" {
l.Error(err)
return
}
}
//Build a p2p network
p, err := p2p.CreateP2PNetwork(id.Bytes(), config.NodeIP, config.NodePort, p2p.GossipDiscover)
if err != nil {
l.Error(err)
return
}
//Build a p2pDKG
suite := suites.MustFind("bn256")
p2pDkg := dkg.NewPDKG(p, suite)
ctx, cancel := context.WithCancel(context.Background())
dosNode = &DosNode{
ctx: ctx,
cancel: cancel,
suite: suite,
p: p,
bootStrapIPs: config.BootStrapIPs,
chain: chainConn,
dkg: p2pDkg,
done: make(chan interface{}),
reqSignc: make(chan request, 21),
cRequestDone: make(chan [4]*big.Int),
id: id.Bytes(),
logger: l,
startTime: time.Now(),
state: "Init Done",
totalQuery: 0,
fulfilledQuery: 0,
numOfworkingGroup: 0,
config: config,
}
return dosNode, nil
}
//End is an operation that does a graceful shutdown
func (d *DosNode) End() {
d.m.Lock()
defer d.m.Unlock()
select {
case <-d.ctx.Done():
default:
d.chain.UnRegisterNode()
d.p.Leave()
d.cancel()
}
}
func (d *DosNode) Start() {
d.logger.Event("peersUpdate", map[string]interface{}{"numOfPeers": 0})
d.state = "Working"
var wg sync.WaitGroup
wg.Add(5)
go func() {
defer wg.Done()
d.startRESTServer()
d.logger.Info("End RESTServer")
d.End()
}()
t := time.Now().Add(60 * time.Second)
if err := d.chain.Connect(d.config.ChainNodePool, t); err != nil {
d.logger.Error(err)
return
}
go func() {
defer wg.Done()
d.onchainLoop()
d.logger.Info("End ONCHAIN Loop")
d.End()
}()
go func() {
defer wg.Done()
d.p.Listen()
d.logger.Info("End P2P Loop")
d.End()
}()
go func() {
defer wg.Done()
d.queryLoop()
d.logger.Info("End Query Loop")
d.End()
}()
go func() {
defer wg.Done()
d.dkg.Loop()
d.logger.Info("End DKG Loop")
d.End()
}()
//go func(){
// prof.NewPprof(d.p).Loop()
//}()
go func() {
defer wg.Done()
for {
select {
case <-d.ctx.Done():
d.logger.Info("ctx.Done")
return
default:
if d.isGuardian {
currentBlockNumber, err := d.chain.CurrentBlock()
d.logger.Debug("currentBlockNumber=" + strconv.FormatUint(currentBlockNumber, 10))
if err != nil {
d.logger.Error(err)
continue
}
handled := d.handleRandom(currentBlockNumber)
d.logger.Debug("handled_0=" + strconv.FormatBool(handled))
if !handled {
handled = d.handleGroupFormation()
d.logger.Debug("handled_handleGroupFormation=" + strconv.FormatBool(handled))
}
if !handled {
handled = d.handleGroupDissolve(currentBlockNumber)
d.logger.Debug("handled_handleGroupDissolve=" + strconv.FormatBool(handled))
}
if !handled {
handled = d.handleBootstrap(currentBlockNumber)
d.logger.Debug("handled_handleBootstrap=" + strconv.FormatBool(handled))
}
}
d.logger.Info("Node heartbeat ...")
time.Sleep(15 * time.Second)
}
}
}()
retry, num := 0, 0
var err error
for {
//Bootstrap p2p network
if d.chain.BootStrapUrl() != "" {
d.logger.Info(fmt.Sprintf("BootStrapUrl : %s", d.chain.BootStrapUrl()))
ips := getBootIps(d.chain.BootStrapUrl())
if len(ips) != 0 {
d.bootStrapIPs = append(d.bootStrapIPs, ips...)
d.bootStrapIPs = unique(d.bootStrapIPs)
}
}
d.logger.Info("Bootstraping ...")
num, err = d.p.Join(d.bootStrapIPs)
if err != nil || num == 0 {
if err != nil {
d.logger.Error(errors.Errorf(" : %w", err))
}
if retry == 10 {
d.logger.Error(errors.New("Can't join p2p network"))
return
}
retry++
time.Sleep(5 * time.Second)
} else {
d.config.BootStrapIPs = d.bootStrapIPs
d.config.UpdateConfig()
d.logger.Event("peersUpdate", map[string]interface{}{"numOfPeers": num})
break
}
}
d.logger.Info(fmt.Sprintf("Join : num of peer %d", num))
appSession := os.Getenv("APPSESSION")
clientIP := os.Getenv("NODEIP")
nodeId := os.Getenv("NODEID")
d.logger.Info(fmt.Sprintf("%s - Version: %s, Node IP: %s, Node ID: %s\n", bootStr, appSession, clientIP, nodeId))
wg.Wait()
d.logger.Info("Node end")
}
func getBootIps(bootStrapUrl string) []string {
req, err := http.NewRequest("GET", bootStrapUrl, nil)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil
}
defer resp.Body.Close()
r, err := ioutil.ReadAll(resp.Body)
str := string(r)
strlist := strings.Split(str, ",")
nodeIPs := make([]string, len(strlist)-1)
for i := 0; i < len(strlist)-1; i++ {
nodeIPs[i] = strlist[i]
}
return nodeIPs
}
func unique(intSlice []string) []string {
keys := make(map[string]bool)
list := []string{}
for _, entry := range intSlice {
if _, value := keys[entry]; !value {
keys[entry] = true
list = append(list, entry)
}
}
return list
}