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cmd, eth: added light client and light server modes

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This commit is contained in:
zsfelfoldi
2016-01-13 19:35:48 +01:00
committed by Felix Lange
parent 9f8d192991
commit 7db7109a5b
17 changed files with 298 additions and 94 deletions
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61
eth/backend.go
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@@ -66,9 +66,14 @@ var (
type Config struct {
ChainConfig *core.ChainConfig // chain configuration
NetworkId int // Network ID to use for selecting peers to connect to
Genesis string // Genesis JSON to seed the chain database with
FastSync bool // Enables the state download based fast synchronisation algorithm
NetworkId int // Network ID to use for selecting peers to connect to
Genesis string // Genesis JSON to seed the chain database with
FastSync bool // Enables the state download based fast synchronisation algorithm
LightMode bool // Running in light client mode
NoDefSrv bool // No default LES server
LightServ int // Maximum percentage of time allowed for serving LES requests
LightPeers int // Maximum number of LES client peers
MaxPeers int // Maximum number of global peers
SkipBcVersionCheck bool // e.g. blockchain export
DatabaseCache int
@@ -100,6 +105,12 @@ type Config struct {
TestGenesisState ethdb.Database // Genesis state to seed the database with (testing only!)
}
type LesServer interface {
Start()
Stop()
Protocols() []p2p.Protocol
}
// Ethereum implements the Ethereum full node service.
type Ethereum struct {
chainConfig *core.ChainConfig
@@ -111,6 +122,7 @@ type Ethereum struct {
txMu sync.Mutex
blockchain *core.BlockChain
protocolManager *ProtocolManager
lesServer LesServer
// DB interfaces
chainDb ethdb.Database // Block chain database
@@ -119,7 +131,7 @@ type Ethereum struct {
httpclient *httpclient.HTTPClient
accountManager *accounts.Manager
apiBackend *EthApiBackend
ApiBackend *EthApiBackend
miner *miner.Miner
Mining bool
@@ -135,10 +147,14 @@ type Ethereum struct {
netRPCService *ethapi.PublicNetAPI
}
func (s *Ethereum) AddLesServer(ls LesServer) {
s.lesServer = ls
}
// New creates a new Ethereum object (including the
// initialisation of the common Ethereum object)
func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
chainDb, err := createDB(ctx, config)
chainDb, err := CreateDB(ctx, config, "chaindata")
if err != nil {
return nil, err
}
@@ -217,7 +233,18 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
newPool := core.NewTxPool(eth.chainConfig, eth.EventMux(), eth.blockchain.State, eth.blockchain.GasLimit)
eth.txPool = newPool
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, eth.eventMux, eth.txPool, eth.pow, eth.blockchain, chainDb); err != nil {
maxPeers := config.MaxPeers
if config.LightServ > 0 {
// if we are running a light server, limit the number of ETH peers so that we reserve some space for incoming LES connections
// temporary solution until the new peer connectivity API is finished
halfPeers := maxPeers / 2
maxPeers -= config.LightPeers
if maxPeers < halfPeers {
maxPeers = halfPeers
}
}
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, maxPeers, eth.eventMux, eth.txPool, eth.pow, eth.blockchain, chainDb); err != nil {
return nil, err
}
eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.pow)
@@ -233,14 +260,14 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
GpobaseCorrectionFactor: config.GpobaseCorrectionFactor,
}
gpo := gasprice.NewGasPriceOracle(eth.blockchain, chainDb, eth.eventMux, gpoParams)
eth.apiBackend = &EthApiBackend{eth, gpo}
eth.ApiBackend = &EthApiBackend{eth, gpo}
return eth, nil
}
// createDB creates the chain database.
func createDB(ctx *node.ServiceContext, config *Config) (ethdb.Database, error) {
db, err := ctx.OpenDatabase("chaindata", config.DatabaseCache, config.DatabaseHandles)
// CreateDB creates the chain database.
func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Database, error) {
db, err := ctx.OpenDatabase(name, config.DatabaseCache, config.DatabaseHandles)
if db, ok := db.(*ethdb.LDBDatabase); ok {
db.Meter("eth/db/chaindata/")
}
@@ -288,7 +315,7 @@ func CreatePoW(config *Config) (*ethash.Ethash, error) {
// 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 {
return append(ethapi.GetAPIs(s.apiBackend, s.solcPath), []rpc.API{
return append(ethapi.GetAPIs(s.ApiBackend, s.solcPath), []rpc.API{
{
Namespace: "eth",
Version: "1.0",
@@ -391,7 +418,11 @@ func (s *Ethereum) Downloader() *downloader.Downloader { return s.protocolManage
// Protocols implements node.Service, returning all the currently configured
// network protocols to start.
func (s *Ethereum) Protocols() []p2p.Protocol {
return s.protocolManager.SubProtocols
if s.lesServer == nil {
return s.protocolManager.SubProtocols
} else {
return append(s.protocolManager.SubProtocols, s.lesServer.Protocols()...)
}
}
// Start implements node.Service, starting all internal goroutines needed by the
@@ -402,6 +433,9 @@ func (s *Ethereum) Start(srvr *p2p.Server) error {
s.StartAutoDAG()
}
s.protocolManager.Start()
if s.lesServer != nil {
s.lesServer.Start()
}
return nil
}
@@ -413,6 +447,9 @@ func (s *Ethereum) Stop() error {
}
s.blockchain.Stop()
s.protocolManager.Stop()
if s.lesServer != nil {
s.lesServer.Stop()
}
s.txPool.Stop()
s.miner.Stop()
s.eventMux.Stop()