cmd, eth: added light client and light server modes

4 files changed, 88 insertions, 6 deletions

diff --git a/cmd/geth/chaincmd.go b/cmd/geth/chaincmd.go
index c1bbbd8dc..7a9cf4ac2 100644
--- a/cmd/geth/chaincmd.go
+++ b/cmd/geth/chaincmd.go
@@ -180,7 +180,7 @@ func exportChain(ctx *cli.Context) error {
 
 func removeDB(ctx *cli.Context) error {
 	stack := utils.MakeNode(ctx, clientIdentifier, gitCommit)
-	dbdir := stack.ResolvePath("chaindata")
+	dbdir := stack.ResolvePath(utils.ChainDbName(ctx))
 	if !common.FileExist(dbdir) {
 		fmt.Println(dbdir, "does not exist")
 		return nil
diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 551705208..75abdc813 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -41,6 +41,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/p2p/discover"
 	"gopkg.in/urfave/cli.v1"
 )
 
@@ -118,6 +119,10 @@ participating.
 		utils.KeyStoreDirFlag,
 		utils.OlympicFlag,
 		utils.FastSyncFlag,
+		utils.LightModeFlag,
+		utils.NoDefSrvFlag,
+		utils.LightServFlag,
+		utils.LightPeersFlag,
 		utils.LightKDFFlag,
 		utils.CacheFlag,
 		utils.TrieCacheGenFlag,
@@ -280,6 +285,31 @@ func startNode(ctx *cli.Context, stack *node.Node) {
 	// Start up the node itself
 	utils.StartNode(stack)
 
+	if ctx.GlobalBool(utils.LightModeFlag.Name) && !ctx.GlobalBool(utils.NoDefSrvFlag.Name) {
+		// add default light server; test phase only
+		addPeer := func(url string) {
+			node, err := discover.ParseNode(url)
+			if err == nil {
+				stack.Server().AddPeer(node)
+			}
+		}
+
+		if ctx.GlobalBool(utils.TestNetFlag.Name) {
+			// TestNet (John Gerryts @phonikg)
+			addPeer("enode://d72af45ba9b60851a8077a4eb07700484b585e5f2e55024e0c93b7ec7d114f2e3fa3c8f3a3358f89da00a609f5a062415deb857ada863b8cdad02b0b0bc90da3@50.112.52.169:30301")
+		} else {
+			if ctx.GlobalBool(utils.OpposeDAOFork.Name) {
+				// Classic (Azure)
+				addPeer("enode://fc3d7b57e5d317946bf421411632ec98d5ffcbf94548cd7bc10088e4fef176670f8ec70280d301a9d0b22fe498203f62b323da15b3acc18b02a1fee2a06b7d3f@40.118.3.223:30305")
+			} else {
+				// MainNet (Azure)
+				addPeer("enode://feaf206a308a669a789be45f4dadcb351246051727f12415ad69e44f8080daf0569c10fe1d9944d245dd1f3e1c89cedda8ce03d7e3d5ed8975a35cad4b4f7ec1@40.118.3.223:30303")
+				// MainNet (John Gerryts @phonikg)
+				addPeer("enode://02b80f0d47c7c157c069d0584067a284cdf188b9267666234b872e70d936a803ad20ea27f78ef1fd6425ae4b7108907e1875adbca96b038004114ac4d1e529a3@50.112.52.169:30300")
+			}
+		}
+	}
+
 	// Unlock any account specifically requested
 	accman := stack.AccountManager()
 	passwords := utils.MakePasswordList(ctx)
diff --git a/cmd/geth/usage.go b/cmd/geth/usage.go
index 4c4e27630..75560d017 100644
--- a/cmd/geth/usage.go
+++ b/cmd/geth/usage.go
@@ -72,6 +72,10 @@ var AppHelpFlagGroups = []flagGroup{
 			utils.DevModeFlag,
 			utils.IdentityFlag,
 			utils.FastSyncFlag,
+			utils.LightModeFlag,
+			utils.NoDefSrvFlag,
+			utils.LightServFlag,
+			utils.LightPeersFlag,
 			utils.LightKDFFlag,
 		},
 	},
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index edb0873f6..40d96a3b5 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -39,6 +39,8 @@ import (
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/les"
+	"github.com/ethereum/go-ethereum/light"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/metrics"
@@ -145,6 +147,24 @@ var (
 		Name:  "fast",
 		Usage: "Enable fast syncing through state downloads",
 	}
+	LightModeFlag = cli.BoolFlag{
+		Name:  "light",
+		Usage: "Enable light client mode",
+	}
+	NoDefSrvFlag = cli.BoolFlag{
+		Name:  "nodefsrv",
+		Usage: "Don't add default LES server (only for test version)",
+	}
+	LightServFlag = cli.IntFlag{
+		Name:  "lightserv",
+		Usage: "Maximum percentage of time allowed for serving LES requests (0-90)",
+		Value: 0,
+	}
+	LightPeersFlag = cli.IntFlag{
+		Name:  "lightpeers",
+		Usage: "Maximum number of LES client peers",
+		Value: 20,
+	}
 	LightKDFFlag = cli.BoolFlag{
 		Name:  "lightkdf",
 		Usage: "Reduce key-derivation RAM & CPU usage at some expense of KDF strength",
@@ -680,6 +700,11 @@ func RegisterEthService(ctx *cli.Context, stack *node.Node, extra []byte) {
 		Etherbase:               MakeEtherbase(stack.AccountManager(), ctx),
 		ChainConfig:             MakeChainConfig(ctx, stack),
 		FastSync:                ctx.GlobalBool(FastSyncFlag.Name),
+		LightMode:               ctx.GlobalBool(LightModeFlag.Name),
+		NoDefSrv:                ctx.GlobalBool(NoDefSrvFlag.Name),
+		LightServ:               ctx.GlobalInt(LightServFlag.Name),
+		LightPeers:              ctx.GlobalInt(LightPeersFlag.Name),
+		MaxPeers:                ctx.GlobalInt(MaxPeersFlag.Name),
 		DatabaseCache:           ctx.GlobalInt(CacheFlag.Name),
 		DatabaseHandles:         MakeDatabaseHandles(),
 		NetworkId:               ctx.GlobalInt(NetworkIdFlag.Name),
@@ -714,6 +739,7 @@ func RegisterEthService(ctx *cli.Context, stack *node.Node, extra []byte) {
 		}
 		ethConf.Genesis = core.TestNetGenesisBlock()
 		state.StartingNonce = 1048576 // (2**20)
+		light.StartingNonce = 1048576 // (2**20)
 
 	case ctx.GlobalBool(DevModeFlag.Name):
 		ethConf.Genesis = core.OlympicGenesisBlock()
@@ -727,10 +753,23 @@ func RegisterEthService(ctx *cli.Context, stack *node.Node, extra []byte) {
 		state.MaxTrieCacheGen = uint16(gen)
 	}
 
-	if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
-		return eth.New(ctx, ethConf)
-	}); err != nil {
-		Fatalf("Failed to register the Ethereum service: %v", err)
+	if ethConf.LightMode {
+		if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
+			return les.New(ctx, ethConf)
+		}); err != nil {
+			Fatalf("Failed to register the Ethereum light node service: %v", err)
+		}
+	} else {
+		if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) {
+			fullNode, err := eth.New(ctx, ethConf)
+			if fullNode != nil && ethConf.LightServ > 0 {
+				ls, _ := les.NewLesServer(fullNode, ethConf)
+				fullNode.AddLesServer(ls)
+			}
+			return fullNode, err
+		}); err != nil {
+			Fatalf("Failed to register the Ethereum full node service: %v", err)
+		}
 	}
 }
 
@@ -830,14 +869,23 @@ func MakeChainConfigFromDb(ctx *cli.Context, db ethdb.Database) *core.ChainConfi
 	return config
 }
 
+func ChainDbName(ctx *cli.Context) string {
+	if ctx.GlobalBool(LightModeFlag.Name) {
+		return "lightchaindata"
+	} else {
+		return "chaindata"
+	}
+}
+
 // MakeChainDatabase open an LevelDB using the flags passed to the client and will hard crash if it fails.
 func MakeChainDatabase(ctx *cli.Context, stack *node.Node) ethdb.Database {
 	var (
 		cache   = ctx.GlobalInt(CacheFlag.Name)
 		handles = MakeDatabaseHandles()
+		name    = ChainDbName(ctx)
 	)
 
-	chainDb, err := stack.OpenDatabase("chaindata", cache, handles)
+	chainDb, err := stack.OpenDatabase(name, cache, handles)
 	if err != nil {
 		Fatalf("Could not open database: %v", err)
 	}