Merge pull request #70 from ava-labs/fix-linting

Fix linting and add to CI

1 files changed, 0 insertions, 785 deletions

diff --git a/ethstats/ethstats.go b/ethstats/ethstats.go
deleted file mode 100644
index 3dd06e3..0000000
--- a/ethstats/ethstats.go
+++ /dev/null
@@ -1,785 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-// Package ethstats implements the network stats reporting service.
-package ethstats
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"math/big"
-	"net/http"
-	"regexp"
-	"runtime"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/ava-labs/coreth/consensus"
-	"github.com/ava-labs/coreth/core"
-	"github.com/ava-labs/coreth/core/types"
-	"github.com/ava-labs/coreth/eth"
-	"github.com/ava-labs/coreth/miner"
-	"github.com/ava-labs/coreth/node"
-	"github.com/ava-labs/coreth/rpc"
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/mclock"
-	"github.com/ethereum/go-ethereum/eth/downloader"
-	"github.com/ethereum/go-ethereum/event"
-	"github.com/ethereum/go-ethereum/les"
-	"github.com/ethereum/go-ethereum/log"
-	"github.com/ethereum/go-ethereum/p2p"
-	"github.com/gorilla/websocket"
-)
-
-const (
-	// historyUpdateRange is the number of blocks a node should report upon login or
-	// history request.
-	historyUpdateRange = 50
-
-	// txChanSize is the size of channel listening to NewTxsEvent.
-	// The number is referenced from the size of tx pool.
-	txChanSize = 4096
-	// chainHeadChanSize is the size of channel listening to ChainHeadEvent.
-	chainHeadChanSize = 10
-)
-
-// backend encompasses the bare-minimum functionality needed for ethstats reporting
-type backend interface {
-	SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
-	SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription
-	CurrentHeader() *types.Header
-	HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error)
-	GetTd(ctx context.Context, hash common.Hash) *big.Int
-	Stats() (pending int, queued int)
-	Downloader() *downloader.Downloader
-}
-
-// fullNodeBackend encompasses the functionality necessary for a full node
-// reporting to ethstats
-type fullNodeBackend interface {
-	backend
-	Miner() *miner.Miner
-	BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error)
-	CurrentBlock() *types.Block
-	SuggestPrice(ctx context.Context) (*big.Int, error)
-}
-
-// Service implements an Ethereum netstats reporting daemon that pushes local
-// chain statistics up to a monitoring server.
-type Service struct {
-	server  *p2p.Server // Peer-to-peer server to retrieve networking infos
-	backend backend
-	engine  consensus.Engine // Consensus engine to retrieve variadic block fields
-
-	node string // Name of the node to display on the monitoring page
-	pass string // Password to authorize access to the monitoring page
-	host string // Remote address of the monitoring service
-
-	pongCh chan struct{} // Pong notifications are fed into this channel
-	histCh chan []uint64 // History request block numbers are fed into this channel
-
-}
-
-// connWrapper is a wrapper to prevent concurrent-write or concurrent-read on the
-// websocket.
-//
-// From Gorilla websocket docs:
-//   Connections support one concurrent reader and one concurrent writer.
-//   Applications are responsible for ensuring that no more than one goroutine calls the write methods
-//     - NextWriter, SetWriteDeadline, WriteMessage, WriteJSON, EnableWriteCompression, SetCompressionLevel
-//   concurrently and that no more than one goroutine calls the read methods
-//     - NextReader, SetReadDeadline, ReadMessage, ReadJSON, SetPongHandler, SetPingHandler
-//   concurrently.
-//   The Close and WriteControl methods can be called concurrently with all other methods.
-type connWrapper struct {
-	conn *websocket.Conn
-
-	rlock sync.Mutex
-	wlock sync.Mutex
-}
-
-func newConnectionWrapper(conn *websocket.Conn) *connWrapper {
-	return &connWrapper{conn: conn}
-}
-
-// WriteJSON wraps corresponding method on the websocket but is safe for concurrent calling
-func (w *connWrapper) WriteJSON(v interface{}) error {
-	w.wlock.Lock()
-	defer w.wlock.Unlock()
-
-	return w.conn.WriteJSON(v)
-}
-
-// ReadJSON wraps corresponding method on the websocket but is safe for concurrent calling
-func (w *connWrapper) ReadJSON(v interface{}) error {
-	w.rlock.Lock()
-	defer w.rlock.Unlock()
-
-	return w.conn.ReadJSON(v)
-}
-
-// Close wraps corresponding method on the websocket but is safe for concurrent calling
-func (w *connWrapper) Close() error {
-	// The Close and WriteControl methods can be called concurrently with all other methods,
-	// so the mutex is not used here
-	return w.conn.Close()
-}
-
-// New returns a monitoring service ready for stats reporting.
-func New(node *node.Node, backend backend, engine consensus.Engine, url string) error {
-	// Parse the netstats connection url
-	re := regexp.MustCompile("([^:@]*)(:([^@]*))?@(.+)")
-	parts := re.FindStringSubmatch(url)
-	if len(parts) != 5 {
-		return fmt.Errorf("invalid netstats url: \"%s\", should be nodename:secret@host:port", url)
-	}
-	ethstats := &Service{
-		backend: backend,
-		engine:  engine,
-		server:  node.Server(),
-		node:    parts[1],
-		pass:    parts[3],
-		host:    parts[4],
-		pongCh:  make(chan struct{}),
-		histCh:  make(chan []uint64, 1),
-	}
-
-	node.RegisterLifecycle(ethstats)
-	return nil
-}
-
-// Start implements node.Lifecycle, starting up the monitoring and reporting daemon.
-func (s *Service) Start() error {
-	go s.loop()
-
-	log.Info("Stats daemon started")
-	return nil
-}
-
-// Stop implements node.Lifecycle, terminating the monitoring and reporting daemon.
-func (s *Service) Stop() error {
-	log.Info("Stats daemon stopped")
-	return nil
-}
-
-// loop keeps trying to connect to the netstats server, reporting chain events
-// until termination.
-func (s *Service) loop() {
-	// Subscribe to chain events to execute updates on
-	chainHeadCh := make(chan core.ChainHeadEvent, chainHeadChanSize)
-	headSub := s.backend.SubscribeChainHeadEvent(chainHeadCh)
-	defer headSub.Unsubscribe()
-
-	txEventCh := make(chan core.NewTxsEvent, txChanSize)
-	txSub := s.backend.SubscribeNewTxsEvent(txEventCh)
-	defer txSub.Unsubscribe()
-
-	// Start a goroutine that exhausts the subscriptions to avoid events piling up
-	var (
-		quitCh = make(chan struct{})
-		headCh = make(chan *types.Block, 1)
-		txCh   = make(chan struct{}, 1)
-	)
-	go func() {
-		var lastTx mclock.AbsTime
-
-	HandleLoop:
-		for {
-			select {
-			// Notify of chain head events, but drop if too frequent
-			case head := <-chainHeadCh:
-				select {
-				case headCh <- head.Block:
-				default:
-				}
-
-			// Notify of new transaction events, but drop if too frequent
-			case <-txEventCh:
-				if time.Duration(mclock.Now()-lastTx) < time.Second {
-					continue
-				}
-				lastTx = mclock.Now()
-
-				select {
-				case txCh <- struct{}{}:
-				default:
-				}
-
-			// node stopped
-			case <-txSub.Err():
-				break HandleLoop
-			case <-headSub.Err():
-				break HandleLoop
-			}
-		}
-		close(quitCh)
-	}()
-
-	// Resolve the URL, defaulting to TLS, but falling back to none too
-	path := fmt.Sprintf("%s/api", s.host)
-	urls := []string{path}
-
-	// url.Parse and url.IsAbs is unsuitable (https://github.com/golang/go/issues/19779)
-	if !strings.Contains(path, "://") {
-		urls = []string{"wss://" + path, "ws://" + path}
-	}
-
-	errTimer := time.NewTimer(0)
-	defer errTimer.Stop()
-	// Loop reporting until termination
-	for {
-		select {
-		case <-quitCh:
-			return
-		case <-errTimer.C:
-			// Establish a websocket connection to the server on any supported URL
-			var (
-				conn *connWrapper
-				err  error
-			)
-			dialer := websocket.Dialer{HandshakeTimeout: 5 * time.Second}
-			header := make(http.Header)
-			header.Set("origin", "http://localhost")
-			for _, url := range urls {
-				c, _, e := dialer.Dial(url, header)
-				err = e
-				if err == nil {
-					conn = newConnectionWrapper(c)
-					break
-				}
-			}
-			if err != nil {
-				log.Warn("Stats server unreachable", "err", err)
-				errTimer.Reset(10 * time.Second)
-				continue
-			}
-			// Authenticate the client with the server
-			if err = s.login(conn); err != nil {
-				log.Warn("Stats login failed", "err", err)
-				conn.Close()
-				errTimer.Reset(10 * time.Second)
-				continue
-			}
-			go s.readLoop(conn)
-
-			// Send the initial stats so our node looks decent from the get go
-			if err = s.report(conn); err != nil {
-				log.Warn("Initial stats report failed", "err", err)
-				conn.Close()
-				errTimer.Reset(0)
-				continue
-			}
-			// Keep sending status updates until the connection breaks
-			fullReport := time.NewTicker(15 * time.Second)
-
-			for err == nil {
-				select {
-				case <-quitCh:
-					fullReport.Stop()
-					// Make sure the connection is closed
-					conn.Close()
-					return
-
-				case <-fullReport.C:
-					if err = s.report(conn); err != nil {
-						log.Warn("Full stats report failed", "err", err)
-					}
-				case list := <-s.histCh:
-					if err = s.reportHistory(conn, list); err != nil {
-						log.Warn("Requested history report failed", "err", err)
-					}
-				case head := <-headCh:
-					if err = s.reportBlock(conn, head); err != nil {
-						log.Warn("Block stats report failed", "err", err)
-					}
-					if err = s.reportPending(conn); err != nil {
-						log.Warn("Post-block transaction stats report failed", "err", err)
-					}
-				case <-txCh:
-					if err = s.reportPending(conn); err != nil {
-						log.Warn("Transaction stats report failed", "err", err)
-					}
-				}
-			}
-			fullReport.Stop()
-
-			// Close the current connection and establish a new one
-			conn.Close()
-			errTimer.Reset(0)
-		}
-	}
-}
-
-// readLoop loops as long as the connection is alive and retrieves data packets
-// from the network socket. If any of them match an active request, it forwards
-// it, if they themselves are requests it initiates a reply, and lastly it drops
-// unknown packets.
-func (s *Service) readLoop(conn *connWrapper) {
-	// If the read loop exists, close the connection
-	defer conn.Close()
-
-	for {
-		// Retrieve the next generic network packet and bail out on error
-		var blob json.RawMessage
-		if err := conn.ReadJSON(&blob); err != nil {
-			log.Warn("Failed to retrieve stats server message", "err", err)
-			return
-		}
-		// If the network packet is a system ping, respond to it directly
-		var ping string
-		if err := json.Unmarshal(blob, &ping); err == nil && strings.HasPrefix(ping, "primus::ping::") {
-			if err := conn.WriteJSON(strings.Replace(ping, "ping", "pong", -1)); err != nil {
-				log.Warn("Failed to respond to system ping message", "err", err)
-				return
-			}
-			continue
-		}
-		// Not a system ping, try to decode an actual state message
-		var msg map[string][]interface{}
-		if err := json.Unmarshal(blob, &msg); err != nil {
-			log.Warn("Failed to decode stats server message", "err", err)
-			return
-		}
-		log.Trace("Received message from stats server", "msg", msg)
-		if len(msg["emit"]) == 0 {
-			log.Warn("Stats server sent non-broadcast", "msg", msg)
-			return
-		}
-		command, ok := msg["emit"][0].(string)
-		if !ok {
-			log.Warn("Invalid stats server message type", "type", msg["emit"][0])
-			return
-		}
-		// If the message is a ping reply, deliver (someone must be listening!)
-		if len(msg["emit"]) == 2 && command == "node-pong" {
-			select {
-			case s.pongCh <- struct{}{}:
-				// Pong delivered, continue listening
-				continue
-			default:
-				// Ping routine dead, abort
-				log.Warn("Stats server pinger seems to have died")
-				return
-			}
-		}
-		// If the message is a history request, forward to the event processor
-		if len(msg["emit"]) == 2 && command == "history" {
-			// Make sure the request is valid and doesn't crash us
-			request, ok := msg["emit"][1].(map[string]interface{})
-			if !ok {
-				log.Warn("Invalid stats history request", "msg", msg["emit"][1])
-				select {
-				case s.histCh <- nil: // Treat it as an no indexes request
-				default:
-				}
-				continue
-			}
-			list, ok := request["list"].([]interface{})
-			if !ok {
-				log.Warn("Invalid stats history block list", "list", request["list"])
-				return
-			}
-			// Convert the block number list to an integer list
-			numbers := make([]uint64, len(list))
-			for i, num := range list {
-				n, ok := num.(float64)
-				if !ok {
-					log.Warn("Invalid stats history block number", "number", num)
-					return
-				}
-				numbers[i] = uint64(n)
-			}
-			select {
-			case s.histCh <- numbers:
-				continue
-			default:
-			}
-		}
-		// Report anything else and continue
-		log.Info("Unknown stats message", "msg", msg)
-	}
-}
-
-// nodeInfo is the collection of meta information about a node that is displayed
-// on the monitoring page.
-type nodeInfo struct {
-	Name     string `json:"name"`
-	Node     string `json:"node"`
-	Port     int    `json:"port"`
-	Network  string `json:"net"`
-	Protocol string `json:"protocol"`
-	API      string `json:"api"`
-	Os       string `json:"os"`
-	OsVer    string `json:"os_v"`
-	Client   string `json:"client"`
-	History  bool   `json:"canUpdateHistory"`
-}
-
-// authMsg is the authentication infos needed to login to a monitoring server.
-type authMsg struct {
-	ID     string   `json:"id"`
-	Info   nodeInfo `json:"info"`
-	Secret string   `json:"secret"`
-}
-
-// login tries to authorize the client at the remote server.
-func (s *Service) login(conn *connWrapper) error {
-	// Construct and send the login authentication
-	infos := s.server.NodeInfo()
-
-	var network, protocol string
-	if info := infos.Protocols["eth"]; info != nil {
-		network = fmt.Sprintf("%d", info.(*eth.NodeInfo).Network)
-		protocol = fmt.Sprintf("eth/%d", eth.ProtocolVersions[0])
-	} else {
-		network = fmt.Sprintf("%d", infos.Protocols["les"].(*les.NodeInfo).Network)
-		protocol = fmt.Sprintf("les/%d", les.ClientProtocolVersions[0])
-	}
-	auth := &authMsg{
-		ID: s.node,
-		Info: nodeInfo{
-			Name:     s.node,
-			Node:     infos.Name,
-			Port:     infos.Ports.Listener,
-			Network:  network,
-			Protocol: protocol,
-			API:      "No",
-			Os:       runtime.GOOS,
-			OsVer:    runtime.GOARCH,
-			Client:   "0.1.1",
-			History:  true,
-		},
-		Secret: s.pass,
-	}
-	login := map[string][]interface{}{
-		"emit": {"hello", auth},
-	}
-	if err := conn.WriteJSON(login); err != nil {
-		return err
-	}
-	// Retrieve the remote ack or connection termination
-	var ack map[string][]string
-	if err := conn.ReadJSON(&ack); err != nil || len(ack["emit"]) != 1 || ack["emit"][0] != "ready" {
-		return errors.New("unauthorized")
-	}
-	return nil
-}
-
-// report collects all possible data to report and send it to the stats server.
-// This should only be used on reconnects or rarely to avoid overloading the
-// server. Use the individual methods for reporting subscribed events.
-func (s *Service) report(conn *connWrapper) error {
-	if err := s.reportLatency(conn); err != nil {
-		return err
-	}
-	if err := s.reportBlock(conn, nil); err != nil {
-		return err
-	}
-	if err := s.reportPending(conn); err != nil {
-		return err
-	}
-	if err := s.reportStats(conn); err != nil {
-		return err
-	}
-	return nil
-}
-
-// reportLatency sends a ping request to the server, measures the RTT time and
-// finally sends a latency update.
-func (s *Service) reportLatency(conn *connWrapper) error {
-	// Send the current time to the ethstats server
-	start := time.Now()
-
-	ping := map[string][]interface{}{
-		"emit": {"node-ping", map[string]string{
-			"id":         s.node,
-			"clientTime": start.String(),
-		}},
-	}
-	if err := conn.WriteJSON(ping); err != nil {
-		return err
-	}
-	// Wait for the pong request to arrive back
-	select {
-	case <-s.pongCh:
-		// Pong delivered, report the latency
-	case <-time.After(5 * time.Second):
-		// Ping timeout, abort
-		return errors.New("ping timed out")
-	}
-	latency := strconv.Itoa(int((time.Since(start) / time.Duration(2)).Nanoseconds() / 1000000))
-
-	// Send back the measured latency
-	log.Trace("Sending measured latency to ethstats", "latency", latency)
-
-	stats := map[string][]interface{}{
-		"emit": {"latency", map[string]string{
-			"id":      s.node,
-			"latency": latency,
-		}},
-	}
-	return conn.WriteJSON(stats)
-}
-
-// blockStats is the information to report about individual blocks.
-type blockStats struct {
-	Number     *big.Int       `json:"number"`
-	Hash       common.Hash    `json:"hash"`
-	ParentHash common.Hash    `json:"parentHash"`
-	Timestamp  *big.Int       `json:"timestamp"`
-	Miner      common.Address `json:"miner"`
-	GasUsed    uint64         `json:"gasUsed"`
-	GasLimit   uint64         `json:"gasLimit"`
-	Diff       string         `json:"difficulty"`
-	TotalDiff  string         `json:"totalDifficulty"`
-	Txs        []txStats      `json:"transactions"`
-	TxHash     common.Hash    `json:"transactionsRoot"`
-	Root       common.Hash    `json:"stateRoot"`
-	Uncles     uncleStats     `json:"uncles"`
-}
-
-// txStats is the information to report about individual transactions.
-type txStats struct {
-	Hash common.Hash `json:"hash"`
-}
-
-// uncleStats is a custom wrapper around an uncle array to force serializing
-// empty arrays instead of returning null for them.
-type uncleStats []*types.Header
-
-func (s uncleStats) MarshalJSON() ([]byte, error) {
-	if uncles := ([]*types.Header)(s); len(uncles) > 0 {
-		return json.Marshal(uncles)
-	}
-	return []byte("[]"), nil
-}
-
-// reportBlock retrieves the current chain head and reports it to the stats server.
-func (s *Service) reportBlock(conn *connWrapper, block *types.Block) error {
-	// Gather the block details from the header or block chain
-	details := s.assembleBlockStats(block)
-
-	// Assemble the block report and send it to the server
-	log.Trace("Sending new block to ethstats", "number", details.Number, "hash", details.Hash)
-
-	stats := map[string]interface{}{
-		"id":    s.node,
-		"block": details,
-	}
-	report := map[string][]interface{}{
-		"emit": {"block", stats},
-	}
-	return conn.WriteJSON(report)
-}
-
-// assembleBlockStats retrieves any required metadata to report a single block
-// and assembles the block stats. If block is nil, the current head is processed.
-func (s *Service) assembleBlockStats(block *types.Block) *blockStats {
-	// Gather the block infos from the local blockchain
-	var (
-		header *types.Header
-		td     *big.Int
-		txs    []txStats
-		uncles []*types.Header
-	)
-
-	// check if backend is a full node
-	fullBackend, ok := s.backend.(fullNodeBackend)
-	if ok {
-		if block == nil {
-			block = fullBackend.CurrentBlock()
-		}
-		header = block.Header()
-		td = fullBackend.GetTd(context.Background(), header.Hash())
-
-		txs = make([]txStats, len(block.Transactions()))
-		for i, tx := range block.Transactions() {
-			txs[i].Hash = tx.Hash()
-		}
-		uncles = block.Uncles()
-	} else {
-		// Light nodes would need on-demand lookups for transactions/uncles, skip
-		if block != nil {
-			header = block.Header()
-		} else {
-			header = s.backend.CurrentHeader()
-		}
-		td = s.backend.GetTd(context.Background(), header.Hash())
-		txs = []txStats{}
-	}
-
-	// Assemble and return the block stats
-	author, _ := s.engine.Author(header)
-
-	return &blockStats{
-		Number:     header.Number,
-		Hash:       header.Hash(),
-		ParentHash: header.ParentHash,
-		Timestamp:  new(big.Int).SetUint64(header.Time),
-		Miner:      author,
-		GasUsed:    header.GasUsed,
-		GasLimit:   header.GasLimit,
-		Diff:       header.Difficulty.String(),
-		TotalDiff:  td.String(),
-		Txs:        txs,
-		TxHash:     header.TxHash,
-		Root:       header.Root,
-		Uncles:     uncles,
-	}
-}
-
-// reportHistory retrieves the most recent batch of blocks and reports it to the
-// stats server.
-func (s *Service) reportHistory(conn *connWrapper, list []uint64) error {
-	// Figure out the indexes that need reporting
-	indexes := make([]uint64, 0, historyUpdateRange)
-	if len(list) > 0 {
-		// Specific indexes requested, send them back in particular
-		indexes = append(indexes, list...)
-	} else {
-		// No indexes requested, send back the top ones
-		head := s.backend.CurrentHeader().Number.Int64()
-		start := head - historyUpdateRange + 1
-		if start < 0 {
-			start = 0
-		}
-		for i := uint64(start); i <= uint64(head); i++ {
-			indexes = append(indexes, i)
-		}
-	}
-	// Gather the batch of blocks to report
-	history := make([]*blockStats, len(indexes))
-	for i, number := range indexes {
-		fullBackend, ok := s.backend.(fullNodeBackend)
-		// Retrieve the next block if it's known to us
-		var block *types.Block
-		if ok {
-			block, _ = fullBackend.BlockByNumber(context.Background(), rpc.BlockNumber(number)) // TODO ignore error here ?
-		} else {
-			if header, _ := s.backend.HeaderByNumber(context.Background(), rpc.BlockNumber(number)); header != nil {
-				block = types.NewBlockWithHeader(header)
-			}
-		}
-		// If we do have the block, add to the history and continue
-		if block != nil {
-			history[len(history)-1-i] = s.assembleBlockStats(block)
-			continue
-		}
-		// Ran out of blocks, cut the report short and send
-		history = history[len(history)-i:]
-		break
-	}
-	// Assemble the history report and send it to the server
-	if len(history) > 0 {
-		log.Trace("Sending historical blocks to ethstats", "first", history[0].Number, "last", history[len(history)-1].Number)
-	} else {
-		log.Trace("No history to send to stats server")
-	}
-	stats := map[string]interface{}{
-		"id":      s.node,
-		"history": history,
-	}
-	report := map[string][]interface{}{
-		"emit": {"history", stats},
-	}
-	return conn.WriteJSON(report)
-}
-
-// pendStats is the information to report about pending transactions.
-type pendStats struct {
-	Pending int `json:"pending"`
-}
-
-// reportPending retrieves the current number of pending transactions and reports
-// it to the stats server.
-func (s *Service) reportPending(conn *connWrapper) error {
-	// Retrieve the pending count from the local blockchain
-	pending, _ := s.backend.Stats()
-	// Assemble the transaction stats and send it to the server
-	log.Trace("Sending pending transactions to ethstats", "count", pending)
-
-	stats := map[string]interface{}{
-		"id": s.node,
-		"stats": &pendStats{
-			Pending: pending,
-		},
-	}
-	report := map[string][]interface{}{
-		"emit": {"pending", stats},
-	}
-	return conn.WriteJSON(report)
-}
-
-// nodeStats is the information to report about the local node.
-type nodeStats struct {
-	Active   bool `json:"active"`
-	Syncing  bool `json:"syncing"`
-	Mining   bool `json:"mining"`
-	Hashrate int  `json:"hashrate"`
-	Peers    int  `json:"peers"`
-	GasPrice int  `json:"gasPrice"`
-	Uptime   int  `json:"uptime"`
-}
-
-// reportStats retrieves various stats about the node at the networking and
-// mining layer and reports it to the stats server.
-func (s *Service) reportStats(conn *connWrapper) error {
-	// Gather the syncing and mining infos from the local miner instance
-	var (
-		mining   bool
-		hashrate int
-		syncing  bool
-		gasprice int
-	)
-	// check if backend is a full node
-	fullBackend, ok := s.backend.(fullNodeBackend)
-	if ok {
-		mining = fullBackend.Miner().Mining()
-		hashrate = int(fullBackend.Miner().HashRate())
-
-		sync := fullBackend.Downloader().Progress()
-		syncing = fullBackend.CurrentHeader().Number.Uint64() >= sync.HighestBlock
-
-		price, _ := fullBackend.SuggestPrice(context.Background())
-		gasprice = int(price.Uint64())
-	} else {
-		sync := s.backend.Downloader().Progress()
-		syncing = s.backend.CurrentHeader().Number.Uint64() >= sync.HighestBlock
-	}
-	// Assemble the node stats and send it to the server
-	log.Trace("Sending node details to ethstats")
-
-	stats := map[string]interface{}{
-		"id": s.node,
-		"stats": &nodeStats{
-			Active:   true,
-			Mining:   mining,
-			Hashrate: hashrate,
-			Peers:    s.server.PeerCount(),
-			GasPrice: gasprice,
-			Syncing:  syncing,
-			Uptime:   100,
-		},
-	}
-	report := map[string][]interface{}{
-		"emit": {"stats", stats},
-	}
-	return conn.WriteJSON(report)
-}