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localnode.go
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localnode.go
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package lnode
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"net"
"net/url"
"sync"
"sync/atomic"
"time"
"github.com/golang/protobuf/proto"
"github.com/nknorg/nkn/v2/api/ratelimiter"
"github.com/nknorg/nkn/v2/chain"
"github.com/nknorg/nkn/v2/chain/pool"
"github.com/nknorg/nkn/v2/config"
"github.com/nknorg/nkn/v2/event"
"github.com/nknorg/nkn/v2/node"
"github.com/nknorg/nkn/v2/pb"
"github.com/nknorg/nkn/v2/util/log"
"github.com/nknorg/nkn/v2/vault"
"github.com/nknorg/nnet"
nnetnode "github.com/nknorg/nnet/node"
"github.com/nknorg/nnet/overlay/chord"
"github.com/nknorg/nnet/overlay/routing"
nnetpb "github.com/nknorg/nnet/protobuf"
"golang.org/x/time/rate"
)
type LocalNode struct {
*node.Node
*neighborNodes // neighbor nodes
*pool.TxnPool // transaction pool of local node
*hashCache // txn hash cache
*node.MessageHandlerStore
account *vault.Account // local node wallet account
nnet *nnet.NNet // nnet instance
relayer *RelayService // relay service
quit chan bool // block syncing channel
requestSigChainTxn *requestTxn
receiveTxnMsg *receiveTxnMsg
syncHeaderLimiter *rate.Limiter
syncBlockLimiter *rate.Limiter
mu sync.RWMutex
syncOnce *sync.Once
relayMessageCount uint64 // count how many messages node has relayed since start
proposalSubmitted uint32 // Count of localNode submitted proposal
}
func NewLocalNode(wallet *vault.Wallet, nn *nnet.NNet, ledgerMode pb.LedgerMode) (*LocalNode, error) {
account, err := wallet.GetDefaultAccount()
if err != nil {
return nil, err
}
nodeData := &pb.NodeData{
PublicKey: account.PublicKey,
WebsocketPort: uint32(config.Parameters.HttpWsPort),
JsonRpcPort: uint32(config.Parameters.HttpJsonPort),
ProtocolVersion: uint32(config.ProtocolVersion),
TlsWebsocketDomain: config.Parameters.HttpWssDomain,
TlsWebsocketPort: uint32(config.Parameters.HttpWssPort),
TlsJsonRpcDomain: config.Parameters.HttpsJsonDomain,
TlsJsonRpcPort: uint32(config.Parameters.HttpsJsonPort),
LedgerMode: ledgerMode,
}
n, err := node.NewNode(nn.GetLocalNode().Node.Node, nodeData)
if err != nil {
return nil, err
}
localNode := &LocalNode{
Node: n,
neighborNodes: newNeighborNodes(),
account: account,
TxnPool: pool.NewTxPool(),
quit: make(chan bool, 1),
hashCache: newHashCache(),
requestSigChainTxn: newRequestTxn(requestSigChainTxnWorkerPoolSize, nil),
receiveTxnMsg: newReceiveTxnMsg(receiveTxnMsgWorkerPoolSize, nil),
syncHeaderLimiter: rate.NewLimiter(rate.Limit(config.Parameters.SyncBlockHeaderRateLimit), int(config.Parameters.SyncBlockHeaderRateBurst)),
syncBlockLimiter: rate.NewLimiter(rate.Limit(config.Parameters.SyncBlockRateLimit), int(config.Parameters.SyncBlockRateBurst)),
MessageHandlerStore: node.NewMessageHandlerStore(),
nnet: nn,
}
localNode.relayer = NewRelayService(wallet, localNode)
nn.GetLocalNode().Node.Data, err = proto.Marshal(localNode.NodeData)
if err != nil {
return nil, err
}
log.Infof("Init node ID to %v", localNode.GetID())
event.Queue.Subscribe(event.BlockPersistCompleted, localNode.cleanupTransactions)
event.Queue.Subscribe(event.NewBlockProduced, localNode.CheckIDChange)
nn.MustApplyMiddleware(nnetnode.ConnectionAccepted{Func: func(conn net.Conn) (bool, bool) {
host, _, err := net.SplitHostPort(conn.RemoteAddr().String())
if err == nil {
limiter := ratelimiter.GetLimiter("node:"+host, config.Parameters.NodeIPRateLimit, int(config.Parameters.NodeIPRateBurst))
if !limiter.Allow() {
log.Infof("Node connection limit of %s reached", host)
return false, false
}
}
return true, true
}})
nn.MustApplyMiddleware(nnetnode.WillConnectToNode{Func: func(n *nnetpb.Node) (bool, bool) {
err := localNode.shouldConnectToNode(n)
if err != nil {
log.Infof("stop connect to node because: %v", err)
return false, false
}
return true, true
}})
nn.MustApplyMiddleware(nnetnode.RemoteNodeReady{Func: func(remoteNode *nnetnode.RemoteNode) bool {
err := localNode.verifyRemoteNode(remoteNode)
if err != nil {
remoteNode.Stop(err)
return false
}
return true
}, Priority: 1000})
var startOnce sync.Once
nn.MustApplyMiddleware(chord.NeighborAdded{Func: func(remoteNode *nnetnode.RemoteNode, index int) bool {
startOnce.Do(localNode.startConnectingToRandomNeighbors)
err := localNode.maybeAddRemoteNode(remoteNode)
if err != nil {
remoteNode.Stop(err)
return false
}
return true
}})
nn.MustApplyMiddleware(chord.NeighborRemoved{Func: func(remoteNode *nnetnode.RemoteNode) bool {
nbr := localNode.GetNeighborByNNetNode(remoteNode)
if nbr != nil {
localNode.RemoveNeighborNode(nbr.GetID())
}
return true
}})
nn.MustApplyMiddleware(nnetnode.MessageEncoded{Func: func(rn *nnetnode.RemoteNode, msg []byte) ([]byte, bool) {
return localNode.encryptMessage(msg, rn), true
}})
nn.MustApplyMiddleware(nnetnode.MessageWillDecode{Func: func(rn *nnetnode.RemoteNode, msg []byte) ([]byte, bool) {
decrypted, err := localNode.decryptMessage(msg, rn)
if err != nil {
if localNode.GetNeighborByNNetNode(rn) != nil {
rn.Stop(err)
} else {
log.Warningf("Decrypt message from %v error: %v", rn, err)
}
return nil, false
}
return decrypted, true
}})
nn.MustApplyMiddleware(routing.RemoteMessageRouted{Func: localNode.remoteMessageRouted})
nn.MustApplyMiddleware(chord.RelayPriority{Func: func(rn *nnetnode.RemoteNode, priority float64) (float64, bool) {
var connTime time.Duration
nbr := localNode.GetNeighborByNNetNode(rn)
if nbr != nil {
connTime = time.Since(nbr.Node.StartTime)
}
priority = relayPriority(priority, connTime)
return priority, true
}})
return localNode, nil
}
func (localNode *LocalNode) MarshalJSON() ([]byte, error) {
var out map[string]interface{}
buf, err := json.Marshal(localNode.Node)
if err != nil {
return nil, err
}
err = json.Unmarshal(buf, &out)
if err != nil {
return nil, err
}
out["height"] = localNode.GetHeight()
out["uptime"] = time.Since(localNode.Node.StartTime) / time.Second
out["version"] = config.Version
out["relayMessageCount"] = localNode.GetRelayMessageCount()
if config.Parameters.MiningDebug {
out["proposalSubmitted"] = localNode.GetProposalSubmitted()
out["currTimeStamp"] = time.Now().Unix()
}
return json.Marshal(out)
}
func (localNode *LocalNode) Start() error {
localNode.startRelayer()
localNode.initSyncing()
localNode.initTxnHandlers()
return nil
}
func (localNode *LocalNode) GetProposalSubmitted() uint32 {
return atomic.LoadUint32(&localNode.proposalSubmitted)
}
func (localNode *LocalNode) IncrementProposalSubmitted() {
atomic.AddUint32(&localNode.proposalSubmitted, 1)
}
func (localNode *LocalNode) GetNnet() *nnet.NNet {
return localNode.nnet
}
func (localNode *LocalNode) GetRelayMessageCount() uint64 {
localNode.mu.RLock()
defer localNode.mu.RUnlock()
return localNode.relayMessageCount
}
func (localNode *LocalNode) IncrementRelayMessageCount() {
localNode.mu.Lock()
localNode.relayMessageCount++
localNode.mu.Unlock()
}
func (localNode *LocalNode) GetTxnPool() *pool.TxnPool {
return localNode.TxnPool
}
func (localNode *LocalNode) GetHeight() uint32 {
return chain.DefaultLedger.Store.GetHeight()
}
func (localNode *LocalNode) SetSyncState(s pb.SyncState) bool {
log.Infof("Set sync state to %s", s.String())
changed := localNode.Node.SetSyncState(s)
if changed && s == pb.SyncState_PERSIST_FINISHED {
config.SyncPruning = config.LivePruning
localNode.verifyNeighbors()
}
return changed
}
func (localNode *LocalNode) GetSyncState() pb.SyncState {
return localNode.Node.GetSyncState()
}
func (localNode *LocalNode) SetMinVerifiableHeight(height uint32) {
log.Infof("Set min verifiable height to %d", height)
localNode.Node.SetMinVerifiableHeight(height)
}
func (localNode *LocalNode) GetWsAddr() string {
return fmt.Sprintf("%s:%d", localNode.GetHostname(), localNode.GetWebsocketPort())
}
func (localNode *LocalNode) GetWssAddr() string {
return fmt.Sprintf("%s:%d", localNode.GetTlsWebsocketDomain(), localNode.GetTlsWebsocketPort())
}
func (localNode *LocalNode) FindSuccessorAddrs(key []byte, numSucc int) ([]string, error) {
c, ok := localNode.nnet.Network.(*chord.Chord)
if !ok {
return nil, errors.New("Overlay is not chord")
}
succs, err := c.FindSuccessors(key, uint32(numSucc))
if err != nil {
return nil, err
}
if len(succs) == 0 {
return nil, errors.New("Found no successors")
}
addrs := make([]string, len(succs))
for i := range succs {
addrs[i] = succs[i].Addr
}
return addrs, nil
}
func (localNode *LocalNode) findAddrForClient(key []byte, tls bool) (string, string, []byte, []byte, error) {
c, ok := localNode.nnet.Network.(*chord.Chord)
if !ok {
return "", "", nil, nil, errors.New("Overlay is not chord")
}
preds, err := c.FindPredecessors(key, 1)
if err != nil {
return "", "", nil, nil, err
}
if len(preds) == 0 {
return "", "", nil, nil, errors.New("Found no predecessors")
}
pred := preds[0]
nodeData := &pb.NodeData{}
err = proto.Unmarshal(pred.Data, nodeData)
if err != nil {
return "", "", nil, nil, err
}
var wsHost, rpcHost string
var wsPort, rpcPort uint16
if tls == true {
// We only check wss because https rpc is optional
if len(nodeData.TlsWebsocketDomain) == 0 || nodeData.TlsWebsocketPort == 0 {
return "", "", nil, nil, errors.New("predecessor node doesn't support WSS protocol")
}
wsHost = nodeData.TlsWebsocketDomain
wsPort = uint16(nodeData.TlsWebsocketPort)
rpcHost = nodeData.TlsJsonRpcDomain
rpcPort = uint16(nodeData.TlsJsonRpcPort)
} else {
address, err := url.Parse(pred.Addr)
if err != nil {
return "", "", nil, nil, err
}
wsHost = address.Hostname()
if wsHost == "" {
return "", "", nil, nil, errors.New("Hostname is empty")
}
wsPort = uint16(nodeData.WebsocketPort)
rpcHost = wsHost
rpcPort = uint16(nodeData.JsonRpcPort)
}
wsAddr := fmt.Sprintf("%s:%d", wsHost, wsPort)
rpcAddr := fmt.Sprintf("%s:%d", rpcHost, rpcPort)
return wsAddr, rpcAddr, nodeData.PublicKey, pred.Id, nil
}
func (localNode *LocalNode) FindWsAddr(key []byte) (string, string, []byte, []byte, error) {
return localNode.findAddrForClient(key, false)
}
func (localNode *LocalNode) FindWssAddr(key []byte) (string, string, []byte, []byte, error) {
return localNode.findAddrForClient(key, true)
}
func (localNode *LocalNode) CheckIDChange(v interface{}) {
localHeight := chain.DefaultLedger.Store.GetHeight()
id, err := chain.DefaultLedger.Store.GetID(localNode.PublicKey, localHeight)
if err != nil {
log.Fatalf("local node has no id:%v", err)
}
if !bytes.Equal(localNode.Id, id) {
log.Fatalf("local node id has changed")
}
}