diff --git a/eth/api_backend.go b/eth/api_backend.go
index 532cd5c33..4ace9b594 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -37,26 +37,26 @@ import (
 	"github.com/ethereum/go-ethereum/rpc"
 )
 
-// EthApiBackend implements ethapi.Backend for full nodes
-type EthApiBackend struct {
+// EthAPIBackend implements ethapi.Backend for full nodes
+type EthAPIBackend struct {
 	eth *Ethereum
 	gpo *gasprice.Oracle
 }
 
-func (b *EthApiBackend) ChainConfig() *params.ChainConfig {
+func (b *EthAPIBackend) ChainConfig() *params.ChainConfig {
 	return b.eth.chainConfig
 }
 
-func (b *EthApiBackend) CurrentBlock() *types.Block {
+func (b *EthAPIBackend) CurrentBlock() *types.Block {
 	return b.eth.blockchain.CurrentBlock()
 }
 
-func (b *EthApiBackend) SetHead(number uint64) {
+func (b *EthAPIBackend) SetHead(number uint64) {
 	b.eth.protocolManager.downloader.Cancel()
 	b.eth.blockchain.SetHead(number)
 }
 
-func (b *EthApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
+func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
 	// Pending block is only known by the miner
 	if blockNr == rpc.PendingBlockNumber {
 		block := b.eth.miner.PendingBlock()
@@ -69,7 +69,7 @@ func (b *EthApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNum
 	return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)), nil
 }
 
-func (b *EthApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
+func (b *EthAPIBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
 	// Pending block is only known by the miner
 	if blockNr == rpc.PendingBlockNumber {
 		block := b.eth.miner.PendingBlock()
@@ -82,7 +82,7 @@ func (b *EthApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumb
 	return b.eth.blockchain.GetBlockByNumber(uint64(blockNr)), nil
 }
 
-func (b *EthApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
+func (b *EthAPIBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
 	// Pending state is only known by the miner
 	if blockNr == rpc.PendingBlockNumber {
 		block, state := b.eth.miner.Pending()
@@ -97,18 +97,18 @@ func (b *EthApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.
 	return stateDb, header, err
 }
 
-func (b *EthApiBackend) GetBlock(ctx context.Context, hash common.Hash) (*types.Block, error) {
+func (b *EthAPIBackend) GetBlock(ctx context.Context, hash common.Hash) (*types.Block, error) {
 	return b.eth.blockchain.GetBlockByHash(hash), nil
 }
 
-func (b *EthApiBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
+func (b *EthAPIBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
 	if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
 		return rawdb.ReadReceipts(b.eth.chainDb, hash, *number), nil
 	}
 	return nil, nil
 }
 
-func (b *EthApiBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
+func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
 	number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash)
 	if number == nil {
 		return nil, nil
@@ -124,11 +124,11 @@ func (b *EthApiBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*typ
 	return logs, nil
 }
 
-func (b *EthApiBackend) GetTd(blockHash common.Hash) *big.Int {
+func (b *EthAPIBackend) GetTd(blockHash common.Hash) *big.Int {
 	return b.eth.blockchain.GetTdByHash(blockHash)
 }
 
-func (b *EthApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
+func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
 	state.SetBalance(msg.From(), math.MaxBig256)
 	vmError := func() error { return nil }
 
@@ -136,31 +136,31 @@ func (b *EthApiBackend) GetEVM(ctx context.Context, msg core.Message, state *sta
 	return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), vmError, nil
 }
 
-func (b *EthApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
+func (b *EthAPIBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
 	return b.eth.BlockChain().SubscribeRemovedLogsEvent(ch)
 }
 
-func (b *EthApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
+func (b *EthAPIBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
 	return b.eth.BlockChain().SubscribeChainEvent(ch)
 }
 
-func (b *EthApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
+func (b *EthAPIBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
 	return b.eth.BlockChain().SubscribeChainHeadEvent(ch)
 }
 
-func (b *EthApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
+func (b *EthAPIBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
 	return b.eth.BlockChain().SubscribeChainSideEvent(ch)
 }
 
-func (b *EthApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
+func (b *EthAPIBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
 	return b.eth.BlockChain().SubscribeLogsEvent(ch)
 }
 
-func (b *EthApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
+func (b *EthAPIBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
 	return b.eth.txPool.AddLocal(signedTx)
 }
 
-func (b *EthApiBackend) GetPoolTransactions() (types.Transactions, error) {
+func (b *EthAPIBackend) GetPoolTransactions() (types.Transactions, error) {
 	pending, err := b.eth.txPool.Pending()
 	if err != nil {
 		return nil, err
@@ -172,56 +172,56 @@ func (b *EthApiBackend) GetPoolTransactions() (types.Transactions, error) {
 	return txs, nil
 }
 
-func (b *EthApiBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
+func (b *EthAPIBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
 	return b.eth.txPool.Get(hash)
 }
 
-func (b *EthApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
+func (b *EthAPIBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
 	return b.eth.txPool.State().GetNonce(addr), nil
 }
 
-func (b *EthApiBackend) Stats() (pending int, queued int) {
+func (b *EthAPIBackend) Stats() (pending int, queued int) {
 	return b.eth.txPool.Stats()
 }
 
-func (b *EthApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
+func (b *EthAPIBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
 	return b.eth.TxPool().Content()
 }
 
-func (b *EthApiBackend) SubscribeTxPreEvent(ch chan<- core.TxPreEvent) event.Subscription {
+func (b *EthAPIBackend) SubscribeTxPreEvent(ch chan<- core.TxPreEvent) event.Subscription {
 	return b.eth.TxPool().SubscribeTxPreEvent(ch)
 }
 
-func (b *EthApiBackend) Downloader() *downloader.Downloader {
+func (b *EthAPIBackend) Downloader() *downloader.Downloader {
 	return b.eth.Downloader()
 }
 
-func (b *EthApiBackend) ProtocolVersion() int {
+func (b *EthAPIBackend) ProtocolVersion() int {
 	return b.eth.EthVersion()
 }
 
-func (b *EthApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
+func (b *EthAPIBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
 	return b.gpo.SuggestPrice(ctx)
 }
 
-func (b *EthApiBackend) ChainDb() ethdb.Database {
+func (b *EthAPIBackend) ChainDb() ethdb.Database {
 	return b.eth.ChainDb()
 }
 
-func (b *EthApiBackend) EventMux() *event.TypeMux {
+func (b *EthAPIBackend) EventMux() *event.TypeMux {
 	return b.eth.EventMux()
 }
 
-func (b *EthApiBackend) AccountManager() *accounts.Manager {
+func (b *EthAPIBackend) AccountManager() *accounts.Manager {
 	return b.eth.AccountManager()
 }
 
-func (b *EthApiBackend) BloomStatus() (uint64, uint64) {
+func (b *EthAPIBackend) BloomStatus() (uint64, uint64) {
 	sections, _, _ := b.eth.bloomIndexer.Sections()
 	return params.BloomBitsBlocks, sections
 }
 
-func (b *EthApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
+func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
 	for i := 0; i < bloomFilterThreads; i++ {
 		go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
 	}
diff --git a/eth/backend.go b/eth/backend.go
index e4c5fef3e..ea70e3826 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -82,7 +82,7 @@ type Ethereum struct {
 	bloomRequests chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
 	bloomIndexer  *core.ChainIndexer             // Bloom indexer operating during block imports
 
-	ApiBackend *EthApiBackend
+	APIBackend *EthAPIBackend
 
 	miner     *miner.Miner
 	gasPrice  *big.Int
@@ -169,12 +169,12 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 	eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.engine)
 	eth.miner.SetExtra(makeExtraData(config.ExtraData))
 
-	eth.ApiBackend = &EthApiBackend{eth, nil}
+	eth.APIBackend = &EthAPIBackend{eth, nil}
 	gpoParams := config.GPO
 	if gpoParams.Default == nil {
 		gpoParams.Default = config.GasPrice
 	}
-	eth.ApiBackend.gpo = gasprice.NewOracle(eth.ApiBackend, gpoParams)
+	eth.APIBackend.gpo = gasprice.NewOracle(eth.APIBackend, gpoParams)
 
 	return eth, nil
 }
@@ -242,7 +242,7 @@ func CreateConsensusEngine(ctx *node.ServiceContext, config *ethash.Config, chai
 // APIs returns the collection of RPC services the ethereum package offers.
 // NOTE, some of these services probably need to be moved to somewhere else.
 func (s *Ethereum) APIs() []rpc.API {
-	apis := ethapi.GetAPIs(s.ApiBackend)
+	apis := ethapi.GetAPIs(s.APIBackend)
 
 	// Append any APIs exposed explicitly by the consensus engine
 	apis = append(apis, s.engine.APIs(s.BlockChain())...)
@@ -272,7 +272,7 @@ func (s *Ethereum) APIs() []rpc.API {
 		}, {
 			Namespace: "eth",
 			Version:   "1.0",
-			Service:   filters.NewPublicFilterAPI(s.ApiBackend, false),
+			Service:   filters.NewPublicFilterAPI(s.APIBackend, false),
 			Public:    true,
 		}, {
 			Namespace: "admin",
diff --git a/eth/protocol.go b/eth/protocol.go
index cd7db57f2..328d5b993 100644
--- a/eth/protocol.go
+++ b/eth/protocol.go
@@ -34,13 +34,13 @@ const (
 	eth63 = 63
 )
 
-// Official short name of the protocol used during capability negotiation.
+// ProtocolName is the official short name of the protocol used during capability negotiation.
 var ProtocolName = "eth"
 
-// Supported versions of the eth protocol (first is primary).
+// ProtocolVersions are the upported versions of the eth protocol (first is primary).
 var ProtocolVersions = []uint{eth63, eth62}
 
-// Number of implemented message corresponding to different protocol versions.
+// ProtocolLengths are the number of implemented message corresponding to different protocol versions.
 var ProtocolLengths = []uint64{17, 8}
 
 const ProtocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a protocol message
diff --git a/ethstats/ethstats.go b/ethstats/ethstats.go
index ae7e25265..a15d84615 100644
--- a/ethstats/ethstats.go
+++ b/ethstats/ethstats.go
@@ -689,7 +689,7 @@ func (s *Service) reportStats(conn *websocket.Conn) error {
 		sync := s.eth.Downloader().Progress()
 		syncing = s.eth.BlockChain().CurrentHeader().Number.Uint64() >= sync.HighestBlock
 
-		price, _ := s.eth.ApiBackend.SuggestPrice(context.Background())
+		price, _ := s.eth.APIBackend.SuggestPrice(context.Background())
 		gasprice = int(price.Uint64())
 	} else {
 		sync := s.les.Downloader().Progress()