eth/63 fast synchronization algorithm

cmd/geth/main.go

@@ -304,7 +304,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
 		utils.DataDirFlag,
 		utils.BlockchainVersionFlag,
 		utils.OlympicFlag,
-		utils.EthVersionFlag,
+		utils.FastSyncFlag,
 		utils.CacheFlag,
 		utils.JSpathFlag,
 		utils.ListenPortFlag,
@@ -360,7 +360,6 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
 		utils.SetupLogger(ctx)
 		utils.SetupNetwork(ctx)
 		utils.SetupVM(ctx)
-		utils.SetupEth(ctx)
 		if ctx.GlobalBool(utils.PProfEanbledFlag.Name) {
 			utils.StartPProf(ctx)
 		}

cmd/utils/flags.go

@@ -148,10 +148,9 @@ var (
 		Name:  "olympic",
 		Usage: "Use olympic style protocol",
 	}
-	EthVersionFlag = cli.IntFlag{
-		Name:  "eth",
-		Value: 62,
-		Usage: "Highest eth protocol to advertise (temporary, dev option)",
+	FastSyncFlag = cli.BoolFlag{
+		Name:  "fast",
+		Usage: "Enables fast syncing through state downloads",
 	}
 
 	// miner settings
@@ -425,12 +424,13 @@ func MakeEthConfig(clientID, version string, ctx *cli.Context) *eth.Config {
 	if err != nil {
 		glog.V(logger.Error).Infoln("WARNING: No etherbase set and no accounts found as default")
 	}
-
+	// Assemble the entire eth configuration and return
 	cfg := &eth.Config{
 		Name:                    common.MakeName(clientID, version),
 		DataDir:                 MustDataDir(ctx),
 		GenesisNonce:            ctx.GlobalInt(GenesisNonceFlag.Name),
 		GenesisFile:             ctx.GlobalString(GenesisFileFlag.Name),
+		FastSync:                ctx.GlobalBool(FastSyncFlag.Name),
 		BlockChainVersion:       ctx.GlobalInt(BlockchainVersionFlag.Name),
 		DatabaseCache:           ctx.GlobalInt(CacheFlag.Name),
 		SkipBcVersionCheck:      false,
@@ -499,7 +499,6 @@ func MakeEthConfig(clientID, version string, ctx *cli.Context) *eth.Config {
 
 		glog.V(logger.Info).Infoln("dev mode enabled")
 	}
-
 	return cfg
 }
 
@@ -532,18 +531,6 @@ func SetupVM(ctx *cli.Context) {
 	vm.SetJITCacheSize(ctx.GlobalInt(VMJitCacheFlag.Name))
 }
 
-// SetupEth configures the eth packages global settings
-func SetupEth(ctx *cli.Context) {
-	version := ctx.GlobalInt(EthVersionFlag.Name)
-	for len(eth.ProtocolVersions) > 0 && eth.ProtocolVersions[0] > uint(version) {
-		eth.ProtocolVersions = eth.ProtocolVersions[1:]
-		eth.ProtocolLengths = eth.ProtocolLengths[1:]
-	}
-	if len(eth.ProtocolVersions) == 0 {
-		Fatalf("No valid eth protocols remaining")
-	}
-}
-
 // MakeChain creates a chain manager from set command line flags.
 func MakeChain(ctx *cli.Context) (chain *core.BlockChain, chainDb ethdb.Database) {
 	datadir := MustDataDir(ctx)

core/bench_test.go

@@ -163,7 +163,7 @@ func benchInsertChain(b *testing.B, disk bool, gen func(int, *BlockGen)) {
 	// Generate a chain of b.N blocks using the supplied block
 	// generator function.
 	genesis := WriteGenesisBlockForTesting(db, GenesisAccount{benchRootAddr, benchRootFunds})
-	chain := GenerateChain(genesis, db, b.N, gen)
+	chain, _ := GenerateChain(genesis, db, b.N, gen)
 
 	// Time the insertion of the new chain.
 	// State and blocks are stored in the same DB.

core/block_processor.go

@@ -111,7 +111,7 @@ func (self *BlockProcessor) ApplyTransaction(gp GasPool, statedb *state.StateDB,
 	}
 
 	logs := statedb.GetLogs(tx.Hash())
-	receipt.SetLogs(logs)
+	receipt.Logs = logs
 	receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
 
 	glog.V(logger.Debug).Infoln(receipt)
@@ -195,14 +195,16 @@ func (sm *BlockProcessor) Process(block *types.Block) (logs vm.Logs, receipts ty
 	defer sm.mutex.Unlock()
 
 	if sm.bc.HasBlock(block.Hash()) {
-		return nil, nil, &KnownBlockError{block.Number(), block.Hash()}
+		if _, err := state.New(block.Root(), sm.chainDb); err == nil {
+			return nil, nil, &KnownBlockError{block.Number(), block.Hash()}
+		}
 	}
-
-	if !sm.bc.HasBlock(block.ParentHash()) {
-		return nil, nil, ParentError(block.ParentHash())
+	if parent := sm.bc.GetBlock(block.ParentHash()); parent != nil {
+		if _, err := state.New(parent.Root(), sm.chainDb); err == nil {
+			return sm.processWithParent(block, parent)
+		}
 	}
-	parent := sm.bc.GetBlock(block.ParentHash())
-	return sm.processWithParent(block, parent)
+	return nil, nil, ParentError(block.ParentHash())
 }
 
 func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (logs vm.Logs, receipts types.Receipts, err error) {
@@ -364,18 +366,40 @@ func (sm *BlockProcessor) GetLogs(block *types.Block) (logs vm.Logs, err error)
 	receipts := GetBlockReceipts(sm.chainDb, block.Hash())
 	// coalesce logs
 	for _, receipt := range receipts {
-		logs = append(logs, receipt.Logs()...)
+		logs = append(logs, receipt.Logs...)
 	}
 	return logs, nil
 }
 
+// ValidateHeader verifies the validity of a header, relying on the database and
+// POW behind the block processor.
+func (sm *BlockProcessor) ValidateHeader(header *types.Header, checkPow, uncle bool) error {
+	// Short circuit if the header's already known or its parent missing
+	if sm.bc.HasHeader(header.Hash()) {
+		return nil
+	}
+	if parent := sm.bc.GetHeader(header.ParentHash); parent == nil {
+		return ParentError(header.ParentHash)
+	} else {
+		return ValidateHeader(sm.Pow, header, parent, checkPow, uncle)
+	}
+}
+
+// ValidateHeaderWithParent verifies the validity of a header, relying on the database and
+// POW behind the block processor.
+func (sm *BlockProcessor) ValidateHeaderWithParent(header, parent *types.Header, checkPow, uncle bool) error {
+	if sm.bc.HasHeader(header.Hash()) {
+		return nil
+	}
+	return ValidateHeader(sm.Pow, header, parent, checkPow, uncle)
+}
+
 // See YP section 4.3.4. "Block Header Validity"
 // Validates a header. Returns an error if the header is invalid.
 func ValidateHeader(pow pow.PoW, header *types.Header, parent *types.Header, checkPow, uncle bool) error {
 	if big.NewInt(int64(len(header.Extra))).Cmp(params.MaximumExtraDataSize) == 1 {
 		return fmt.Errorf("Header extra data too long (%d)", len(header.Extra))
 	}
-
 	if uncle {
 		if header.Time.Cmp(common.MaxBig) == 1 {
 			return BlockTSTooBigErr
@@ -412,7 +436,7 @@ func ValidateHeader(pow pow.PoW, header *types.Header, parent *types.Header, che
 	if checkPow {
 		// Verify the nonce of the header. Return an error if it's not valid
 		if !pow.Verify(types.NewBlockWithHeader(header)) {
-			return ValidationError("Header's nonce is invalid (= %x)", header.Nonce)
+			return &BlockNonceErr{Hash: header.Hash(), Number: header.Number, Nonce: header.Nonce.Uint64()}
 		}
 	}
 	return nil

core/block_processor_test.go

@@ -70,16 +70,16 @@ func TestPutReceipt(t *testing.T) {
 	hash[0] = 2
 
 	receipt := new(types.Receipt)
-	receipt.SetLogs(vm.Logs{&vm.Log{
-		Address:   addr,
-		Topics:    []common.Hash{hash},
-		Data:      []byte("hi"),
-		Number:    42,
-		TxHash:    hash,
-		TxIndex:   0,
-		BlockHash: hash,
-		Index:     0,
-	}})
+	receipt.Logs = vm.Logs{&vm.Log{
+		Address:     addr,
+		Topics:      []common.Hash{hash},
+		Data:        []byte("hi"),
+		BlockNumber: 42,
+		TxHash:      hash,
+		TxIndex:     0,
+		BlockHash:   hash,
+		Index:       0,
+	}}
 
 	PutReceipts(db, types.Receipts{receipt})
 	receipt = GetReceipt(db, common.Hash{})