cmd/geth, cmd/utils, core, rpc: renamed to blockchain

* Renamed ChainManager to BlockChain
* Checkpointing is no longer required and never really properly worked
when the state was corrupted.

9 files changed, 149 insertions, 144 deletions

diff --git a/eth/backend.go b/eth/backend.go
index 349dfa613..a480b4931 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -217,7 +217,7 @@ type Ethereum struct {
 	// State manager for processing new blocks and managing the over all states
 	blockProcessor  *core.BlockProcessor
 	txPool          *core.TxPool
-	chainManager    *core.ChainManager
+	blockchain      *core.BlockChain
 	accountManager  *accounts.Manager
 	whisper         *whisper.Whisper
 	pow             *ethash.Ethash
@@ -365,7 +365,7 @@ func New(config *Config) (*Ethereum, error) {
 		eth.pow = ethash.New()
 	}
 	//genesis := core.GenesisBlock(uint64(config.GenesisNonce), stateDb)
-	eth.chainManager, err = core.NewChainManager(chainDb, eth.pow, eth.EventMux())
+	eth.blockchain, err = core.NewBlockChain(chainDb, eth.pow, eth.EventMux())
 	if err != nil {
 		if err == core.ErrNoGenesis {
 			return nil, fmt.Errorf(`Genesis block not found. Please supply a genesis block with the "--genesis /path/to/file" argument`)
@@ -373,11 +373,11 @@ func New(config *Config) (*Ethereum, error) {
 
 		return nil, err
 	}
-	eth.txPool = core.NewTxPool(eth.EventMux(), eth.chainManager.State, eth.chainManager.GasLimit)
+	eth.txPool = core.NewTxPool(eth.EventMux(), eth.blockchain.State, eth.blockchain.GasLimit)
 
-	eth.blockProcessor = core.NewBlockProcessor(chainDb, eth.pow, eth.chainManager, eth.EventMux())
-	eth.chainManager.SetProcessor(eth.blockProcessor)
-	eth.protocolManager = NewProtocolManager(config.NetworkId, eth.eventMux, eth.txPool, eth.pow, eth.chainManager, chainDb)
+	eth.blockProcessor = core.NewBlockProcessor(chainDb, eth.pow, eth.blockchain, eth.EventMux())
+	eth.blockchain.SetProcessor(eth.blockProcessor)
+	eth.protocolManager = NewProtocolManager(config.NetworkId, eth.eventMux, eth.txPool, eth.pow, eth.blockchain, chainDb)
 
 	eth.miner = miner.New(eth, eth.EventMux(), eth.pow)
 	eth.miner.SetGasPrice(config.GasPrice)
@@ -441,7 +441,7 @@ func (s *Ethereum) NodeInfo() *NodeInfo {
 		DiscPort:   int(node.UDP),
 		TCPPort:    int(node.TCP),
 		ListenAddr: s.net.ListenAddr,
-		Td:         s.ChainManager().Td().String(),
+		Td:         s.BlockChain().Td().String(),
 	}
 }
 
@@ -478,7 +478,7 @@ func (s *Ethereum) PeersInfo() (peersinfo []*PeerInfo) {
 }
 
 func (s *Ethereum) ResetWithGenesisBlock(gb *types.Block) {
-	s.chainManager.ResetWithGenesisBlock(gb)
+	s.blockchain.ResetWithGenesisBlock(gb)
 }
 
 func (s *Ethereum) StartMining(threads int) error {
@@ -518,7 +518,7 @@ func (s *Ethereum) Miner() *miner.Miner { return s.miner }
 // func (s *Ethereum) Logger() logger.LogSystem             { return s.logger }
 func (s *Ethereum) Name() string                         { return s.net.Name }
 func (s *Ethereum) AccountManager() *accounts.Manager    { return s.accountManager }
-func (s *Ethereum) ChainManager() *core.ChainManager     { return s.chainManager }
+func (s *Ethereum) BlockChain() *core.BlockChain         { return s.blockchain }
 func (s *Ethereum) BlockProcessor() *core.BlockProcessor { return s.blockProcessor }
 func (s *Ethereum) TxPool() *core.TxPool                 { return s.txPool }
 func (s *Ethereum) Whisper() *whisper.Whisper            { return s.whisper }
@@ -581,7 +581,7 @@ func (self *Ethereum) AddPeer(nodeURL string) error {
 
 func (s *Ethereum) Stop() {
 	s.net.Stop()
-	s.chainManager.Stop()
+	s.blockchain.Stop()
 	s.protocolManager.Stop()
 	s.txPool.Stop()
 	s.eventMux.Stop()
@@ -622,7 +622,7 @@ func (self *Ethereum) StartAutoDAG() {
 			select {
 			case <-timer:
 				glog.V(logger.Info).Infof("checking DAG (ethash dir: %s)", ethash.DefaultDir)
-				currentBlock := self.ChainManager().CurrentBlock().NumberU64()
+				currentBlock := self.BlockChain().CurrentBlock().NumberU64()
 				thisEpoch := currentBlock / epochLength
 				if nextEpoch <= thisEpoch {
 					if currentBlock%epochLength > autoDAGepochHeight {
diff --git a/eth/filters/filter.go b/eth/filters/filter.go
index 0b4911629..2bcf20d0c 100644
--- a/eth/filters/filter.go
+++ b/eth/filters/filter.go
@@ -1,4 +1,4 @@
-// Copyright 2014 The go-ethereum Authors
+// Copyright 2015 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
@@ -23,6 +23,7 @@ import (
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/ethdb"
 )
 
 type AccountChange struct {
@@ -31,7 +32,7 @@ type AccountChange struct {
 
 // Filtering interface
 type Filter struct {
-	db       common.Database
+	db       ethdb.Database
 	earliest int64
 	latest   int64
 	skip     int
@@ -46,7 +47,7 @@ type Filter struct {
 
 // Create a new filter which uses a bloom filter on blocks to figure out whether a particular block
 // is interesting or not.
-func New(db common.Database) *Filter {
+func New(db ethdb.Database) *Filter {
 	return &Filter{db: db}
 }
 
@@ -79,7 +80,7 @@ func (self *Filter) SetSkip(skip int) {
 
 // Run filters logs with the current parameters set
 func (self *Filter) Find() vm.Logs {
-	earliestBlock := core.GetCurrentBlock(self.db)
+	earliestBlock := core.GetBlock(self.db, core.GetHeadBlockHash(self.db))
 	var earliestBlockNo uint64 = uint64(self.earliest)
 	if self.earliest == -1 {
 		earliestBlockNo = earliestBlock.NumberU64()
@@ -91,8 +92,12 @@ func (self *Filter) Find() vm.Logs {
 
 	var (
 		logs  vm.Logs
-		block = core.GetBlockByNumber(self.db, latestBlockNo)
+		block *types.Block
 	)
+	hash := core.GetCanonicalHash(self.db, latestBlockNo)
+	if hash != (common.Hash{}) {
+		block = core.GetBlock(self.db, hash)
+	}
 
 done:
 	for i := 0; block != nil; i++ {
@@ -120,7 +125,7 @@ done:
 			logs = append(logs, self.FilterLogs(unfiltered)...)
 		}
 
-		block = core.GetBlockByHash(self.db, block.ParentHash())
+		block = core.GetBlock(self.db, block.ParentHash())
 	}
 
 	skip := int(math.Min(float64(len(logs)), float64(self.skip)))
diff --git a/eth/filters/filter_system.go b/eth/filters/filter_system.go
index 1c27c7be4..4972dcd59 100644
--- a/eth/filters/filter_system.go
+++ b/eth/filters/filter_system.go
@@ -28,7 +28,7 @@ import (
 
 // FilterSystem manages filters that filter specific events such as
 // block, transaction and log events. The Filtering system can be used to listen
-// for specific LOG events fires by the EVM (Ethereum Virtual Machine).
+// for specific LOG events fired by the EVM (Ethereum Virtual Machine).
 type FilterSystem struct {
 	eventMux *event.TypeMux
 
diff --git a/eth/gasprice.go b/eth/gasprice.go
index 3caad73c6..c08b96129 100644
--- a/eth/gasprice.go
+++ b/eth/gasprice.go
@@ -36,7 +36,7 @@ type blockPriceInfo struct {
 
 type GasPriceOracle struct {
 	eth                           *Ethereum
-	chain                         *core.ChainManager
+	chain                         *core.BlockChain
 	events                        event.Subscription
 	blocks                        map[uint64]*blockPriceInfo
 	firstProcessed, lastProcessed uint64
@@ -48,7 +48,7 @@ func NewGasPriceOracle(eth *Ethereum) (self *GasPriceOracle) {
 	self = &GasPriceOracle{}
 	self.blocks = make(map[uint64]*blockPriceInfo)
 	self.eth = eth
-	self.chain = eth.chainManager
+	self.chain = eth.blockchain
 	self.events = eth.EventMux().Subscribe(
 		core.ChainEvent{},
 		core.ChainSplitEvent{},
diff --git a/eth/handler.go b/eth/handler.go
index 52c9c4151..fc92338b4 100644
--- a/eth/handler.go
+++ b/eth/handler.go
@@ -60,9 +60,9 @@ func (ep extProt) GetHashes(hash common.Hash) error    { return ep.getHashes(has
 func (ep extProt) GetBlock(hashes []common.Hash) error { return ep.getBlocks(hashes) }
 
 type ProtocolManager struct {
-	txpool   txPool
-	chainman *core.ChainManager
-	chaindb  ethdb.Database
+	txpool     txPool
+	blockchain *core.BlockChain
+	chaindb    ethdb.Database
 
 	downloader *downloader.Downloader
 	fetcher    *fetcher.Fetcher
@@ -87,17 +87,17 @@ type ProtocolManager struct {
 
 // NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
 // with the ethereum network.
-func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, chainman *core.ChainManager, chaindb ethdb.Database) *ProtocolManager {
+func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, blockchain *core.BlockChain, chaindb ethdb.Database) *ProtocolManager {
 	// Create the protocol manager with the base fields
 	manager := &ProtocolManager{
-		eventMux:  mux,
-		txpool:    txpool,
-		chainman:  chainman,
-		chaindb:   chaindb,
-		peers:     newPeerSet(),
-		newPeerCh: make(chan *peer, 1),
-		txsyncCh:  make(chan *txsync),
-		quitSync:  make(chan struct{}),
+		eventMux:   mux,
+		txpool:     txpool,
+		blockchain: blockchain,
+		chaindb:    chaindb,
+		peers:      newPeerSet(),
+		newPeerCh:  make(chan *peer, 1),
+		txsyncCh:   make(chan *txsync),
+		quitSync:   make(chan struct{}),
 	}
 	// Initiate a sub-protocol for every implemented version we can handle
 	manager.SubProtocols = make([]p2p.Protocol, len(ProtocolVersions))
@@ -116,15 +116,15 @@ func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow po
 		}
 	}
 	// Construct the different synchronisation mechanisms
-	manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.CurrentBlock, manager.chainman.GetTd, manager.chainman.InsertChain, manager.removePeer)
+	manager.downloader = downloader.New(manager.eventMux, manager.blockchain.HasBlock, manager.blockchain.GetBlock, manager.blockchain.CurrentBlock, manager.blockchain.GetTd, manager.blockchain.InsertChain, manager.removePeer)
 
 	validator := func(block *types.Block, parent *types.Block) error {
 		return core.ValidateHeader(pow, block.Header(), parent.Header(), true, false)
 	}
 	heighter := func() uint64 {
-		return manager.chainman.CurrentBlock().NumberU64()
+		return manager.blockchain.CurrentBlock().NumberU64()
 	}
-	manager.fetcher = fetcher.New(manager.chainman.GetBlock, validator, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
+	manager.fetcher = fetcher.New(manager.blockchain.GetBlock, validator, manager.BroadcastBlock, heighter, manager.blockchain.InsertChain, manager.removePeer)
 
 	return manager
 }
@@ -187,7 +187,7 @@ func (pm *ProtocolManager) handle(p *peer) error {
 	glog.V(logger.Debug).Infof("%v: peer connected [%s]", p, p.Name())
 
 	// Execute the Ethereum handshake
-	td, head, genesis := pm.chainman.Status()
+	td, head, genesis := pm.blockchain.Status()
 	if err := p.Handshake(td, head, genesis); err != nil {
 		glog.V(logger.Debug).Infof("%v: handshake failed: %v", p, err)
 		return err
@@ -252,7 +252,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			request.Amount = uint64(downloader.MaxHashFetch)
 		}
 		// Retrieve the hashes from the block chain and return them
-		hashes := pm.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
+		hashes := pm.blockchain.GetBlockHashesFromHash(request.Hash, request.Amount)
 		if len(hashes) == 0 {
 			glog.V(logger.Debug).Infof("invalid block hash %x", request.Hash.Bytes()[:4])
 		}
@@ -268,9 +268,9 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			request.Amount = uint64(downloader.MaxHashFetch)
 		}
 		// Calculate the last block that should be retrieved, and short circuit if unavailable
-		last := pm.chainman.GetBlockByNumber(request.Number + request.Amount - 1)
+		last := pm.blockchain.GetBlockByNumber(request.Number + request.Amount - 1)
 		if last == nil {
-			last = pm.chainman.CurrentBlock()
+			last = pm.blockchain.CurrentBlock()
 			request.Amount = last.NumberU64() - request.Number + 1
 		}
 		if last.NumberU64() < request.Number {
@@ -278,7 +278,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		}
 		// Retrieve the hashes from the last block backwards, reverse and return
 		hashes := []common.Hash{last.Hash()}
-		hashes = append(hashes, pm.chainman.GetBlockHashesFromHash(last.Hash(), request.Amount-1)...)
+		hashes = append(hashes, pm.blockchain.GetBlockHashesFromHash(last.Hash(), request.Amount-1)...)
 
 		for i := 0; i < len(hashes)/2; i++ {
 			hashes[i], hashes[len(hashes)-1-i] = hashes[len(hashes)-1-i], hashes[i]
@@ -318,7 +318,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 				return errResp(ErrDecode, "msg %v: %v", msg, err)
 			}
 			// Retrieve the requested block, stopping if enough was found
-			if block := pm.chainman.GetBlock(hash); block != nil {
+			if block := pm.blockchain.GetBlock(hash); block != nil {
 				blocks = append(blocks, block)
 				bytes += block.Size()
 			}
@@ -358,9 +358,9 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			// Retrieve the next header satisfying the query
 			var origin *types.Header
 			if query.Origin.Hash != (common.Hash{}) {
-				origin = pm.chainman.GetHeader(query.Origin.Hash)
+				origin = pm.blockchain.GetHeader(query.Origin.Hash)
 			} else {
-				origin = pm.chainman.GetHeaderByNumber(query.Origin.Number)
+				origin = pm.blockchain.GetHeaderByNumber(query.Origin.Number)
 			}
 			if origin == nil {
 				break
@@ -373,7 +373,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			case query.Origin.Hash != (common.Hash{}) && query.Reverse:
 				// Hash based traversal towards the genesis block
 				for i := 0; i < int(query.Skip)+1; i++ {
-					if header := pm.chainman.GetHeader(query.Origin.Hash); header != nil {
+					if header := pm.blockchain.GetHeader(query.Origin.Hash); header != nil {
 						query.Origin.Hash = header.ParentHash
 					} else {
 						unknown = true
@@ -382,8 +382,8 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 				}
 			case query.Origin.Hash != (common.Hash{}) && !query.Reverse:
 				// Hash based traversal towards the leaf block
-				if header := pm.chainman.GetHeaderByNumber(origin.Number.Uint64() + query.Skip + 1); header != nil {
-					if pm.chainman.GetBlockHashesFromHash(header.Hash(), query.Skip+1)[query.Skip] == query.Origin.Hash {
+				if header := pm.blockchain.GetHeaderByNumber(origin.Number.Uint64() + query.Skip + 1); header != nil {
+					if pm.blockchain.GetBlockHashesFromHash(header.Hash(), query.Skip+1)[query.Skip] == query.Origin.Hash {
 						query.Origin.Hash = header.Hash()
 					} else {
 						unknown = true
@@ -466,7 +466,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 				return errResp(ErrDecode, "msg %v: %v", msg, err)
 			}
 			// Retrieve the requested block body, stopping if enough was found
-			if data := pm.chainman.GetBodyRLP(hash); len(data) != 0 {
+			if data := pm.blockchain.GetBodyRLP(hash); len(data) != 0 {
 				bodies = append(bodies, data)
 				bytes += len(data)
 			}
@@ -562,7 +562,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		// Schedule all the unknown hashes for retrieval
 		unknown := make([]announce, 0, len(announces))
 		for _, block := range announces {
-			if !pm.chainman.HasBlock(block.Hash) {
+			if !pm.blockchain.HasBlock(block.Hash) {
 				unknown = append(unknown, block)
 			}
 		}
@@ -586,7 +586,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		request.Block.ReceivedAt = msg.ReceivedAt
 
 		// Mark the block's arrival for whatever reason
-		_, chainHead, _ := pm.chainman.Status()
+		_, chainHead, _ := pm.blockchain.Status()
 		jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
 			BlockHash:     request.Block.Hash().Hex(),
 			BlockNumber:   request.Block.Number(),
@@ -603,7 +603,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		// Update the peers total difficulty if needed, schedule a download if gapped
 		if request.TD.Cmp(p.Td()) > 0 {
 			p.SetTd(request.TD)
-			if request.TD.Cmp(new(big.Int).Add(pm.chainman.Td(), request.Block.Difficulty())) > 0 {
+			if request.TD.Cmp(new(big.Int).Add(pm.blockchain.Td(), request.Block.Difficulty())) > 0 {
 				go pm.synchronise(p)
 			}
 		}
@@ -645,8 +645,8 @@ func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
 	if propagate {
 		// Calculate the TD of the block (it's not imported yet, so block.Td is not valid)
 		var td *big.Int
-		if parent := pm.chainman.GetBlock(block.ParentHash()); parent != nil {
-			td = new(big.Int).Add(block.Difficulty(), pm.chainman.GetTd(block.ParentHash()))
+		if parent := pm.blockchain.GetBlock(block.ParentHash()); parent != nil {
+			td = new(big.Int).Add(block.Difficulty(), pm.blockchain.GetTd(block.ParentHash()))
 		} else {
 			glog.V(logger.Error).Infof("propagating dangling block #%d [%x]", block.NumberU64(), hash[:4])
 			return
@@ -659,7 +659,7 @@ func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
 		glog.V(logger.Detail).Infof("propagated block %x to %d peers in %v", hash[:4], len(transfer), time.Since(block.ReceivedAt))
 	}
 	// Otherwise if the block is indeed in out own chain, announce it
-	if pm.chainman.HasBlock(hash) {
+	if pm.blockchain.HasBlock(hash) {
 		for _, peer := range peers {
 			if peer.version < eth62 {
 				peer.SendNewBlockHashes61([]common.Hash{hash})
diff --git a/eth/handler_test.go b/eth/handler_test.go
index 6400d4e78..2b8c6168a 100644
--- a/eth/handler_test.go
+++ b/eth/handler_test.go
@@ -33,23 +33,23 @@ func testGetBlockHashes(t *testing.T, protocol int) {
 		number int
 		result int
 	}{
-		{common.Hash{}, 1, 0},                                 // Make sure non existent hashes don't return results
-		{pm.chainman.Genesis().Hash(), 1, 0},                  // There are no hashes to retrieve up from the genesis
-		{pm.chainman.GetBlockByNumber(5).Hash(), 5, 5},        // All the hashes including the genesis requested
-		{pm.chainman.GetBlockByNumber(5).Hash(), 10, 5},       // More hashes than available till the genesis requested
-		{pm.chainman.GetBlockByNumber(100).Hash(), 10, 10},    // All hashes available from the middle of the chain
-		{pm.chainman.CurrentBlock().Hash(), 10, 10},           // All hashes available from the head of the chain
-		{pm.chainman.CurrentBlock().Hash(), limit, limit},     // Request the maximum allowed hash count
-		{pm.chainman.CurrentBlock().Hash(), limit + 1, limit}, // Request more than the maximum allowed hash count
+		{common.Hash{}, 1, 0},                                   // Make sure non existent hashes don't return results
+		{pm.blockchain.Genesis().Hash(), 1, 0},                  // There are no hashes to retrieve up from the genesis
+		{pm.blockchain.GetBlockByNumber(5).Hash(), 5, 5},        // All the hashes including the genesis requested
+		{pm.blockchain.GetBlockByNumber(5).Hash(), 10, 5},       // More hashes than available till the genesis requested
+		{pm.blockchain.GetBlockByNumber(100).Hash(), 10, 10},    // All hashes available from the middle of the chain
+		{pm.blockchain.CurrentBlock().Hash(), 10, 10},           // All hashes available from the head of the chain
+		{pm.blockchain.CurrentBlock().Hash(), limit, limit},     // Request the maximum allowed hash count
+		{pm.blockchain.CurrentBlock().Hash(), limit + 1, limit}, // Request more than the maximum allowed hash count
 	}
 	// Run each of the tests and verify the results against the chain
 	for i, tt := range tests {
 		// Assemble the hash response we would like to receive
 		resp := make([]common.Hash, tt.result)
 		if len(resp) > 0 {
-			from := pm.chainman.GetBlock(tt.origin).NumberU64() - 1
+			from := pm.blockchain.GetBlock(tt.origin).NumberU64() - 1
 			for j := 0; j < len(resp); j++ {
-				resp[j] = pm.chainman.GetBlockByNumber(uint64(int(from) - j)).Hash()
+				resp[j] = pm.blockchain.GetBlockByNumber(uint64(int(from) - j)).Hash()
 			}
 		}
 		// Send the hash request and verify the response
@@ -76,11 +76,11 @@ func testGetBlockHashesFromNumber(t *testing.T, protocol int) {
 		number int
 		result int
 	}{
-		{pm.chainman.CurrentBlock().NumberU64() + 1, 1, 0},     // Out of bounds requests should return empty
-		{pm.chainman.CurrentBlock().NumberU64(), 1, 1},         // Make sure the head hash can be retrieved
-		{pm.chainman.CurrentBlock().NumberU64() - 4, 5, 5},     // All hashes, including the head hash requested
-		{pm.chainman.CurrentBlock().NumberU64() - 4, 10, 5},    // More hashes requested than available till the head
-		{pm.chainman.CurrentBlock().NumberU64() - 100, 10, 10}, // All hashes available from the middle of the chain
+		{pm.blockchain.CurrentBlock().NumberU64() + 1, 1, 0},     // Out of bounds requests should return empty
+		{pm.blockchain.CurrentBlock().NumberU64(), 1, 1},         // Make sure the head hash can be retrieved
+		{pm.blockchain.CurrentBlock().NumberU64() - 4, 5, 5},     // All hashes, including the head hash requested
+		{pm.blockchain.CurrentBlock().NumberU64() - 4, 10, 5},    // More hashes requested than available till the head
+		{pm.blockchain.CurrentBlock().NumberU64() - 100, 10, 10}, // All hashes available from the middle of the chain
 		{0, 10, 10},           // All hashes available from the root of the chain
 		{0, limit, limit},     // Request the maximum allowed hash count
 		{0, limit + 1, limit}, // Request more than the maximum allowed hash count
@@ -91,7 +91,7 @@ func testGetBlockHashesFromNumber(t *testing.T, protocol int) {
 		// Assemble the hash response we would like to receive
 		resp := make([]common.Hash, tt.result)
 		for j := 0; j < len(resp); j++ {
-			resp[j] = pm.chainman.GetBlockByNumber(tt.origin + uint64(j)).Hash()
+			resp[j] = pm.blockchain.GetBlockByNumber(tt.origin + uint64(j)).Hash()
 		}
 		// Send the hash request and verify the response
 		p2p.Send(peer.app, 0x08, getBlockHashesFromNumberData{tt.origin, uint64(tt.number)})
@@ -117,22 +117,22 @@ func testGetBlocks(t *testing.T, protocol int) {
 		available []bool        // Availability of explicitly requested blocks
 		expected  int           // Total number of existing blocks to expect
 	}{
-		{1, nil, nil, 1},                                                       // A single random block should be retrievable
-		{10, nil, nil, 10},                                                     // Multiple random blocks should be retrievable
-		{limit, nil, nil, limit},                                               // The maximum possible blocks should be retrievable
-		{limit + 1, nil, nil, limit},                                           // No more that the possible block count should be returned
-		{0, []common.Hash{pm.chainman.Genesis().Hash()}, []bool{true}, 1},      // The genesis block should be retrievable
-		{0, []common.Hash{pm.chainman.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
-		{0, []common.Hash{common.Hash{}}, []bool{false}, 0},                    // A non existent block should not be returned
+		{1, nil, nil, 1},                                                         // A single random block should be retrievable
+		{10, nil, nil, 10},                                                       // Multiple random blocks should be retrievable
+		{limit, nil, nil, limit},                                                 // The maximum possible blocks should be retrievable
+		{limit + 1, nil, nil, limit},                                             // No more than the possible block count should be returned
+		{0, []common.Hash{pm.blockchain.Genesis().Hash()}, []bool{true}, 1},      // The genesis block should be retrievable
+		{0, []common.Hash{pm.blockchain.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
+		{0, []common.Hash{common.Hash{}}, []bool{false}, 0},                      // A non existent block should not be returned
 
 		// Existing and non-existing blocks interleaved should not cause problems
 		{0, []common.Hash{
 			common.Hash{},
-			pm.chainman.GetBlockByNumber(1).Hash(),
+			pm.blockchain.GetBlockByNumber(1).Hash(),
 			common.Hash{},
-			pm.chainman.GetBlockByNumber(10).Hash(),
+			pm.blockchain.GetBlockByNumber(10).Hash(),
 			common.Hash{},
-			pm.chainman.GetBlockByNumber(100).Hash(),
+			pm.blockchain.GetBlockByNumber(100).Hash(),
 			common.Hash{},
 		}, []bool{false, true, false, true, false, true, false}, 3},
 	}
@@ -144,11 +144,11 @@ func testGetBlocks(t *testing.T, protocol int) {
 
 		for j := 0; j < tt.random; j++ {
 			for {
-				num := rand.Int63n(int64(pm.chainman.CurrentBlock().NumberU64()))
+				num := rand.Int63n(int64(pm.blockchain.CurrentBlock().NumberU64()))
 				if !seen[num] {
 					seen[num] = true
 
-					block := pm.chainman.GetBlockByNumber(uint64(num))
+					block := pm.blockchain.GetBlockByNumber(uint64(num))
 					hashes = append(hashes, block.Hash())
 					if len(blocks) < tt.expected {
 						blocks = append(blocks, block)
@@ -160,7 +160,7 @@ func testGetBlocks(t *testing.T, protocol int) {
 		for j, hash := range tt.explicit {
 			hashes = append(hashes, hash)
 			if tt.available[j] && len(blocks) < tt.expected {
-				blocks = append(blocks, pm.chainman.GetBlock(hash))
+				blocks = append(blocks, pm.blockchain.GetBlock(hash))
 			}
 		}
 		// Send the hash request and verify the response
@@ -194,83 +194,83 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 	}{
 		// A single random block should be retrievable by hash and number too
 		{
-			&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.chainman.GetBlockByNumber(limit / 2).Hash()}, Amount: 1},
-			[]common.Hash{pm.chainman.GetBlockByNumber(limit / 2).Hash()},
+			&getBlockHeadersData{Origin: hashOrNumber{Hash: pm.blockchain.GetBlockByNumber(limit / 2).Hash()}, Amount: 1},
+			[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
 		}, {
 			&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 1},
-			[]common.Hash{pm.chainman.GetBlockByNumber(limit / 2).Hash()},
+			[]common.Hash{pm.blockchain.GetBlockByNumber(limit / 2).Hash()},
 		},
 		// Multiple headers should be retrievable in both directions
 		{
 			&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(limit / 2).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 + 1).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 + 2).Hash(),
+				pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 + 1).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 + 2).Hash(),
 			},
 		}, {
 			&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Amount: 3, Reverse: true},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(limit / 2).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 - 1).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 - 2).Hash(),
+				pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 - 1).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 - 2).Hash(),
 			},
 		},
 		// Multiple headers with skip lists should be retrievable
 		{
 			&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(limit / 2).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 + 4).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 + 8).Hash(),
+				pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 + 4).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 + 8).Hash(),
 			},
 		}, {
 			&getBlockHeadersData{Origin: hashOrNumber{Number: limit / 2}, Skip: 3, Amount: 3, Reverse: true},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(limit / 2).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 - 4).Hash(),
-				pm.chainman.GetBlockByNumber(limit/2 - 8).Hash(),
+				pm.blockchain.GetBlockByNumber(limit / 2).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 - 4).Hash(),
+				pm.blockchain.GetBlockByNumber(limit/2 - 8).Hash(),
 			},
 		},
 		// The chain endpoints should be retrievable
 		{
 			&getBlockHeadersData{Origin: hashOrNumber{Number: 0}, Amount: 1},
-			[]common.Hash{pm.chainman.GetBlockByNumber(0).Hash()},
+			[]common.Hash{pm.blockchain.GetBlockByNumber(0).Hash()},
 		}, {
-			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.chainman.CurrentBlock().NumberU64()}, Amount: 1},
-			[]common.Hash{pm.chainman.CurrentBlock().Hash()},
+			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64()}, Amount: 1},
+			[]common.Hash{pm.blockchain.CurrentBlock().Hash()},
 		},
 		// Ensure protocol limits are honored
 		{
-			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.chainman.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
-			pm.chainman.GetBlockHashesFromHash(pm.chainman.CurrentBlock().Hash(), limit),
+			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
+			pm.blockchain.GetBlockHashesFromHash(pm.blockchain.CurrentBlock().Hash(), limit),
 		},
 		// Check that requesting more than available is handled gracefully
 		{
-			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.chainman.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
+			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(pm.chainman.CurrentBlock().NumberU64() - 4).Hash(),
-				pm.chainman.GetBlockByNumber(pm.chainman.CurrentBlock().NumberU64()).Hash(),
+				pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
+				pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64()).Hash(),
 			},
 		}, {
 			&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(4).Hash(),
-				pm.chainman.GetBlockByNumber(0).Hash(),
+				pm.blockchain.GetBlockByNumber(4).Hash(),
+				pm.blockchain.GetBlockByNumber(0).Hash(),
 			},
 		},
 		// Check that requesting more than available is handled gracefully, even if mid skip
 		{
-			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.chainman.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
+			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(pm.chainman.CurrentBlock().NumberU64() - 4).Hash(),
-				pm.chainman.GetBlockByNumber(pm.chainman.CurrentBlock().NumberU64() - 1).Hash(),
+				pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 4).Hash(),
+				pm.blockchain.GetBlockByNumber(pm.blockchain.CurrentBlock().NumberU64() - 1).Hash(),
 			},
 		}, {
 			&getBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
 			[]common.Hash{
-				pm.chainman.GetBlockByNumber(4).Hash(),
-				pm.chainman.GetBlockByNumber(1).Hash(),
+				pm.blockchain.GetBlockByNumber(4).Hash(),
+				pm.blockchain.GetBlockByNumber(1).Hash(),
 			},
 		},
 		// Check that non existing headers aren't returned
@@ -278,7 +278,7 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 			&getBlockHeadersData{Origin: hashOrNumber{Hash: unknown}, Amount: 1},
 			[]common.Hash{},
 		}, {
-			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.chainman.CurrentBlock().NumberU64() + 1}, Amount: 1},
+			&getBlockHeadersData{Origin: hashOrNumber{Number: pm.blockchain.CurrentBlock().NumberU64() + 1}, Amount: 1},
 			[]common.Hash{},
 		},
 	}
@@ -287,7 +287,7 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 		// Collect the headers to expect in the response
 		headers := []*types.Header{}
 		for _, hash := range tt.expect {
-			headers = append(headers, pm.chainman.GetBlock(hash).Header())
+			headers = append(headers, pm.blockchain.GetBlock(hash).Header())
 		}
 		// Send the hash request and verify the response
 		p2p.Send(peer.app, 0x03, tt.query)
@@ -315,22 +315,22 @@ func testGetBlockBodies(t *testing.T, protocol int) {
 		available []bool        // Availability of explicitly requested blocks
 		expected  int           // Total number of existing blocks to expect
 	}{
-		{1, nil, nil, 1},                                                       // A single random block should be retrievable
-		{10, nil, nil, 10},                                                     // Multiple random blocks should be retrievable
-		{limit, nil, nil, limit},                                               // The maximum possible blocks should be retrievable
-		{limit + 1, nil, nil, limit},                                           // No more that the possible block count should be returned
-		{0, []common.Hash{pm.chainman.Genesis().Hash()}, []bool{true}, 1},      // The genesis block should be retrievable
-		{0, []common.Hash{pm.chainman.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
-		{0, []common.Hash{common.Hash{}}, []bool{false}, 0},                    // A non existent block should not be returned
+		{1, nil, nil, 1},                                                         // A single random block should be retrievable
+		{10, nil, nil, 10},                                                       // Multiple random blocks should be retrievable
+		{limit, nil, nil, limit},                                                 // The maximum possible blocks should be retrievable
+		{limit + 1, nil, nil, limit},                                             // No more than the possible block count should be returned
+		{0, []common.Hash{pm.blockchain.Genesis().Hash()}, []bool{true}, 1},      // The genesis block should be retrievable
+		{0, []common.Hash{pm.blockchain.CurrentBlock().Hash()}, []bool{true}, 1}, // The chains head block should be retrievable
+		{0, []common.Hash{common.Hash{}}, []bool{false}, 0},                      // A non existent block should not be returned
 
 		// Existing and non-existing blocks interleaved should not cause problems
 		{0, []common.Hash{
 			common.Hash{},
-			pm.chainman.GetBlockByNumber(1).Hash(),
+			pm.blockchain.GetBlockByNumber(1).Hash(),
 			common.Hash{},
-			pm.chainman.GetBlockByNumber(10).Hash(),
+			pm.blockchain.GetBlockByNumber(10).Hash(),
 			common.Hash{},
-			pm.chainman.GetBlockByNumber(100).Hash(),
+			pm.blockchain.GetBlockByNumber(100).Hash(),
 			common.Hash{},
 		}, []bool{false, true, false, true, false, true, false}, 3},
 	}
@@ -342,11 +342,11 @@ func testGetBlockBodies(t *testing.T, protocol int) {
 
 		for j := 0; j < tt.random; j++ {
 			for {
-				num := rand.Int63n(int64(pm.chainman.CurrentBlock().NumberU64()))
+				num := rand.Int63n(int64(pm.blockchain.CurrentBlock().NumberU64()))
 				if !seen[num] {
 					seen[num] = true
 
-					block := pm.chainman.GetBlockByNumber(uint64(num))
+					block := pm.blockchain.GetBlockByNumber(uint64(num))
 					hashes = append(hashes, block.Hash())
 					if len(bodies) < tt.expected {
 						bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
@@ -358,7 +358,7 @@ func testGetBlockBodies(t *testing.T, protocol int) {
 		for j, hash := range tt.explicit {
 			hashes = append(hashes, hash)
 			if tt.available[j] && len(bodies) < tt.expected {
-				block := pm.chainman.GetBlock(hash)
+				block := pm.blockchain.GetBlock(hash)
 				bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
 			}
 		}
@@ -442,11 +442,11 @@ func testGetNodeData(t *testing.T, protocol int) {
 		statedb.Put(hashes[i].Bytes(), data[i])
 	}
 	accounts := []common.Address{testBankAddress, acc1Addr, acc2Addr}
-	for i := uint64(0); i <= pm.chainman.CurrentBlock().NumberU64(); i++ {
-		trie := state.New(pm.chainman.GetBlockByNumber(i).Root(), statedb)
+	for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
+		trie := state.New(pm.blockchain.GetBlockByNumber(i).Root(), statedb)
 
 		for j, acc := range accounts {
-			bw := pm.chainman.State().GetBalance(acc)
+			bw := pm.blockchain.State().GetBalance(acc)
 			bh := trie.GetBalance(acc)
 
 			if (bw != nil && bh == nil) || (bw == nil && bh != nil) {
@@ -505,8 +505,8 @@ func testGetReceipt(t *testing.T, protocol int) {
 
 	// Collect the hashes to request, and the response to expect
 	hashes := []common.Hash{}
-	for i := uint64(0); i <= pm.chainman.CurrentBlock().NumberU64(); i++ {
-		for _, tx := range pm.chainman.GetBlockByNumber(i).Transactions() {
+	for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
+		for _, tx := range pm.blockchain.GetBlockByNumber(i).Transactions() {
 			hashes = append(hashes, tx.Hash())
 		}
 	}
diff --git a/eth/helper_test.go b/eth/helper_test.go
index 034751f7f..e42fa1f82 100644
--- a/eth/helper_test.go
+++ b/eth/helper_test.go
@@ -30,18 +30,18 @@ var (
 // channels for different events.
 func newTestProtocolManager(blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) *ProtocolManager {
 	var (
-		evmux       = new(event.TypeMux)
-		pow         = new(core.FakePow)
-		db, _       = ethdb.NewMemDatabase()
-		genesis     = core.WriteGenesisBlockForTesting(db, core.GenesisAccount{testBankAddress, testBankFunds})
-		chainman, _ = core.NewChainManager(db, pow, evmux)
-		blockproc   = core.NewBlockProcessor(db, pow, chainman, evmux)
+		evmux         = new(event.TypeMux)
+		pow           = new(core.FakePow)
+		db, _         = ethdb.NewMemDatabase()
+		genesis       = core.WriteGenesisBlockForTesting(db, core.GenesisAccount{testBankAddress, testBankFunds})
+		blockchain, _ = core.NewBlockChain(db, pow, evmux)
+		blockproc     = core.NewBlockProcessor(db, pow, blockchain, evmux)
 	)
-	chainman.SetProcessor(blockproc)
-	if _, err := chainman.InsertChain(core.GenerateChain(genesis, db, blocks, generator)); err != nil {
+	blockchain.SetProcessor(blockproc)
+	if _, err := blockchain.InsertChain(core.GenerateChain(genesis, db, blocks, generator)); err != nil {
 		panic(err)
 	}
-	pm := NewProtocolManager(NetworkId, evmux, &testTxPool{added: newtx}, pow, chainman, db)
+	pm := NewProtocolManager(NetworkId, evmux, &testTxPool{added: newtx}, pow, blockchain, db)
 	pm.Start()
 	return pm
 }
@@ -116,7 +116,7 @@ func newTestPeer(name string, version int, pm *ProtocolManager, shake bool) (*te
 	}
 	// Execute any implicitly requested handshakes and return
 	if shake {
-		td, head, genesis := pm.chainman.Status()
+		td, head, genesis := pm.blockchain.Status()
 		tp.handshake(nil, td, head, genesis)
 	}
 	return tp, errc
diff --git a/eth/protocol_test.go b/eth/protocol_test.go
index bc3b5acfc..523e6c1eb 100644
--- a/eth/protocol_test.go
+++ b/eth/protocol_test.go
@@ -45,7 +45,7 @@ func TestStatusMsgErrors64(t *testing.T) { testStatusMsgErrors(t, 64) }
 
 func testStatusMsgErrors(t *testing.T, protocol int) {
 	pm := newTestProtocolManager(0, nil, nil)
-	td, currentBlock, genesis := pm.chainman.Status()
+	td, currentBlock, genesis := pm.blockchain.Status()
 	defer pm.Stop()
 
 	tests := []struct {
diff --git a/eth/sync.go b/eth/sync.go
index b4dea4b0f..5a2031c68 100644
--- a/eth/sync.go
+++ b/eth/sync.go
@@ -160,7 +160,7 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 		return
 	}
 	// Make sure the peer's TD is higher than our own. If not drop.
-	if peer.Td().Cmp(pm.chainman.Td()) <= 0 {
+	if peer.Td().Cmp(pm.blockchain.Td()) <= 0 {
 		return
 	}
 	// Otherwise try to sync with the downloader