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.

35 files changed, 267 insertions, 302 deletions

diff --git a/cmd/geth/blocktestcmd.go b/cmd/geth/blocktestcmd.go
index d6195e025..e0a5becdc 100644
--- a/cmd/geth/blocktestcmd.go
+++ b/cmd/geth/blocktestcmd.go
@@ -118,7 +118,7 @@ func runOneBlockTest(ctx *cli.Context, test *tests.BlockTest) (*eth.Ethereum, er
 		return ethereum, fmt.Errorf("InsertPreState: %v", err)
 	}
 
-	cm := ethereum.ChainManager()
+	cm := ethereum.BlockChain()
 	validBlocks, err := test.TryBlocksInsert(cm)
 	if err != nil {
 		return ethereum, fmt.Errorf("Block Test load error: %v", err)
diff --git a/cmd/geth/js_test.go b/cmd/geth/js_test.go
index 1f5b28e3a..2ad3d669c 100644
--- a/cmd/geth/js_test.go
+++ b/cmd/geth/js_test.go
@@ -196,7 +196,7 @@ func TestBlockChain(t *testing.T) {
 	tmpfile := filepath.Join(extmp, "export.chain")
 	tmpfileq := strconv.Quote(tmpfile)
 
-	ethereum.ChainManager().Reset()
+	ethereum.BlockChain().Reset()
 
 	checkEvalJSON(t, repl, `admin.exportChain(`+tmpfileq+`)`, `true`)
 	if _, err := os.Stat(tmpfile); err != nil {
diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index a9aa9f61f..e8292fdf2 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -48,7 +48,7 @@ import (
 
 const (
 	ClientIdentifier = "Geth"
-	Version          = "1.2.0"
+	Version          = "1.2.0-dev"
 	VersionMajor     = 1
 	VersionMinor     = 2
 	VersionPatch     = 0
diff --git a/cmd/utils/cmd.go b/cmd/utils/cmd.go
index 983762db8..5e4bfc937 100644
--- a/cmd/utils/cmd.go
+++ b/cmd/utils/cmd.go
@@ -169,7 +169,7 @@ func FormatTransactionData(data string) []byte {
 	return d
 }
 
-func ImportChain(chain *core.ChainManager, fn string) error {
+func ImportChain(chain *core.BlockChain, fn string) error {
 	// Watch for Ctrl-C while the import is running.
 	// If a signal is received, the import will stop at the next batch.
 	interrupt := make(chan os.Signal, 1)
@@ -244,7 +244,7 @@ func ImportChain(chain *core.ChainManager, fn string) error {
 	return nil
 }
 
-func hasAllBlocks(chain *core.ChainManager, bs []*types.Block) bool {
+func hasAllBlocks(chain *core.BlockChain, bs []*types.Block) bool {
 	for _, b := range bs {
 		if !chain.HasBlock(b.Hash()) {
 			return false
@@ -253,21 +253,21 @@ func hasAllBlocks(chain *core.ChainManager, bs []*types.Block) bool {
 	return true
 }
 
-func ExportChain(chainmgr *core.ChainManager, fn string) error {
+func ExportChain(blockchain *core.BlockChain, fn string) error {
 	glog.Infoln("Exporting blockchain to", fn)
 	fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
 	if err != nil {
 		return err
 	}
 	defer fh.Close()
-	if err := chainmgr.Export(fh); err != nil {
+	if err := blockchain.Export(fh); err != nil {
 		return err
 	}
 	glog.Infoln("Exported blockchain to", fn)
 	return nil
 }
 
-func ExportAppendChain(chainmgr *core.ChainManager, fn string, first uint64, last uint64) error {
+func ExportAppendChain(blockchain *core.BlockChain, fn string, first uint64, last uint64) error {
 	glog.Infoln("Exporting blockchain to", fn)
 	// TODO verify mode perms
 	fh, err := os.OpenFile(fn, os.O_CREATE|os.O_APPEND|os.O_WRONLY, os.ModePerm)
@@ -275,7 +275,7 @@ func ExportAppendChain(chainmgr *core.ChainManager, fn string, first uint64, las
 		return err
 	}
 	defer fh.Close()
-	if err := chainmgr.ExportN(fh, first, last); err != nil {
+	if err := blockchain.ExportN(fh, first, last); err != nil {
 		return err
 	}
 	glog.Infoln("Exported blockchain to", fn)
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index ad474f17d..dea43bc5c 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -508,7 +508,7 @@ func SetupEth(ctx *cli.Context) {
 }
 
 // MakeChain creates a chain manager from set command line flags.
-func MakeChain(ctx *cli.Context) (chain *core.ChainManager, chainDb ethdb.Database) {
+func MakeChain(ctx *cli.Context) (chain *core.BlockChain, chainDb ethdb.Database) {
 	datadir := MustDataDir(ctx)
 	cache := ctx.GlobalInt(CacheFlag.Name)
 
@@ -527,7 +527,7 @@ func MakeChain(ctx *cli.Context) (chain *core.ChainManager, chainDb ethdb.Databa
 	eventMux := new(event.TypeMux)
 	pow := ethash.New()
 	//genesis := core.GenesisBlock(uint64(ctx.GlobalInt(GenesisNonceFlag.Name)), blockDB)
-	chain, err = core.NewChainManager(chainDb, pow, eventMux)
+	chain, err = core.NewBlockChain(chainDb, pow, eventMux)
 	if err != nil {
 		Fatalf("Could not start chainmanager: %v", err)
 	}
diff --git a/core/bench_test.go b/core/bench_test.go
index def4f0d2a..27f3e3158 100644
--- a/core/bench_test.go
+++ b/core/bench_test.go
@@ -168,7 +168,7 @@ func benchInsertChain(b *testing.B, disk bool, gen func(int, *BlockGen)) {
 	// Time the insertion of the new chain.
 	// State and blocks are stored in the same DB.
 	evmux := new(event.TypeMux)
-	chainman, _ := NewChainManager(db, FakePow{}, evmux)
+	chainman, _ := NewBlockChain(db, FakePow{}, evmux)
 	chainman.SetProcessor(NewBlockProcessor(db, FakePow{}, chainman, evmux))
 	defer chainman.Stop()
 	b.ReportAllocs()
diff --git a/core/block_processor.go b/core/block_processor.go
index 40e3931ba..783e15687 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -47,7 +47,7 @@ type BlockProcessor struct {
 	// Mutex for locking the block processor. Blocks can only be handled one at a time
 	mutex sync.Mutex
 	// Canonical block chain
-	bc *ChainManager
+	bc *BlockChain
 	// non-persistent key/value memory storage
 	mem map[string]*big.Int
 	// Proof of work used for validating
@@ -70,12 +70,12 @@ type GasPool interface {
 	SubGas(gas, price *big.Int) error
 }
 
-func NewBlockProcessor(db ethdb.Database, pow pow.PoW, chainManager *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
+func NewBlockProcessor(db ethdb.Database, pow pow.PoW, blockchain *BlockChain, eventMux *event.TypeMux) *BlockProcessor {
 	sm := &BlockProcessor{
 		chainDb:  db,
 		mem:      make(map[string]*big.Int),
 		Pow:      pow,
-		bc:       chainManager,
+		bc:       blockchain,
 		eventMux: eventMux,
 	}
 	return sm
@@ -124,7 +124,7 @@ func (self *BlockProcessor) ApplyTransaction(gp GasPool, statedb *state.StateDB,
 
 	return receipt, gas, err
 }
-func (self *BlockProcessor) ChainManager() *ChainManager {
+func (self *BlockProcessor) BlockChain() *BlockChain {
 	return self.bc
 }
 
@@ -347,7 +347,7 @@ func (sm *BlockProcessor) VerifyUncles(statedb *state.StateDB, block, parent *ty
 
 // GetBlockReceipts returns the receipts beloniging to the block hash
 func (sm *BlockProcessor) GetBlockReceipts(bhash common.Hash) types.Receipts {
-	if block := sm.ChainManager().GetBlock(bhash); block != nil {
+	if block := sm.BlockChain().GetBlock(bhash); block != nil {
 		return GetBlockReceipts(sm.chainDb, block.Hash())
 	}
 
diff --git a/core/block_processor_test.go b/core/block_processor_test.go
index 5735b8d0a..ba8bd7bcd 100644
--- a/core/block_processor_test.go
+++ b/core/block_processor_test.go
@@ -30,16 +30,16 @@ import (
 	"github.com/ethereum/go-ethereum/pow/ezp"
 )
 
-func proc() (*BlockProcessor, *ChainManager) {
+func proc() (*BlockProcessor, *BlockChain) {
 	db, _ := ethdb.NewMemDatabase()
 	var mux event.TypeMux
 
 	WriteTestNetGenesisBlock(db, 0)
-	chainMan, err := NewChainManager(db, thePow(), &mux)
+	blockchain, err := NewBlockChain(db, thePow(), &mux)
 	if err != nil {
 		fmt.Println(err)
 	}
-	return NewBlockProcessor(db, ezp.New(), chainMan, &mux), chainMan
+	return NewBlockProcessor(db, ezp.New(), blockchain, &mux), blockchain
 }
 
 func TestNumber(t *testing.T) {
diff --git a/core/chain_manager.go b/core/blockchain.go
index 49f831a59..e8209f8e3 100644
--- a/core/chain_manager.go
+++ b/core/blockchain.go
@@ -55,11 +55,9 @@ const (
 	blockCacheLimit     = 256
 	maxFutureBlocks     = 256
 	maxTimeFutureBlocks = 30
-	checkpointLimit     = 200
 )
 
-type ChainManager struct {
-	//eth          EthManager
+type BlockChain struct {
 	chainDb      ethdb.Database
 	processor    types.BlockProcessor
 	eventMux     *event.TypeMux
@@ -69,7 +67,6 @@ type ChainManager struct {
 	chainmu sync.RWMutex
 	tsmu    sync.RWMutex
 
-	checkpoint      int // checkpoint counts towards the new checkpoint
 	td              *big.Int
 	currentBlock    *types.Block
 	currentGasLimit *big.Int
@@ -90,7 +87,7 @@ type ChainManager struct {
 	pow pow.PoW
 }
 
-func NewChainManager(chainDb ethdb.Database, pow pow.PoW, mux *event.TypeMux) (*ChainManager, error) {
+func NewBlockChain(chainDb ethdb.Database, pow pow.PoW, mux *event.TypeMux) (*BlockChain, error) {
 	headerCache, _ := lru.New(headerCacheLimit)
 	bodyCache, _ := lru.New(bodyCacheLimit)
 	bodyRLPCache, _ := lru.New(bodyCacheLimit)
@@ -98,7 +95,7 @@ func NewChainManager(chainDb ethdb.Database, pow pow.PoW, mux *event.TypeMux) (*
 	blockCache, _ := lru.New(blockCacheLimit)
 	futureBlocks, _ := lru.New(maxFutureBlocks)
 
-	bc := &ChainManager{
+	bc := &BlockChain{
 		chainDb:      chainDb,
 		eventMux:     mux,
 		quit:         make(chan struct{}),
@@ -144,7 +141,7 @@ func NewChainManager(chainDb ethdb.Database, pow pow.PoW, mux *event.TypeMux) (*
 	return bc, nil
 }
 
-func (bc *ChainManager) SetHead(head *types.Block) {
+func (bc *BlockChain) SetHead(head *types.Block) {
 	bc.mu.Lock()
 	defer bc.mu.Unlock()
 
@@ -163,80 +160,55 @@ func (bc *ChainManager) SetHead(head *types.Block) {
 	bc.setLastState()
 }
 
-func (self *ChainManager) Td() *big.Int {
+func (self *BlockChain) Td() *big.Int {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
 	return new(big.Int).Set(self.td)
 }
 
-func (self *ChainManager) GasLimit() *big.Int {
+func (self *BlockChain) GasLimit() *big.Int {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
 	return self.currentBlock.GasLimit()
 }
 
-func (self *ChainManager) LastBlockHash() common.Hash {
+func (self *BlockChain) LastBlockHash() common.Hash {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
 	return self.currentBlock.Hash()
 }
 
-func (self *ChainManager) CurrentBlock() *types.Block {
+func (self *BlockChain) CurrentBlock() *types.Block {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
 	return self.currentBlock
 }
 
-func (self *ChainManager) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
+func (self *BlockChain) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
 	return new(big.Int).Set(self.td), self.currentBlock.Hash(), self.genesisBlock.Hash()
 }
 
-func (self *ChainManager) SetProcessor(proc types.BlockProcessor) {
+func (self *BlockChain) SetProcessor(proc types.BlockProcessor) {
 	self.processor = proc
 }
 
-func (self *ChainManager) State() *state.StateDB {
+func (self *BlockChain) State() *state.StateDB {
 	return state.New(self.CurrentBlock().Root(), self.chainDb)
 }
 
-func (bc *ChainManager) recover() bool {
-	data, _ := bc.chainDb.Get([]byte("checkpoint"))
-	if len(data) != 0 {
-		block := bc.GetBlock(common.BytesToHash(data))
-		if block != nil {
-			if err := WriteCanonicalHash(bc.chainDb, block.Hash(), block.NumberU64()); err != nil {
-				glog.Fatalf("failed to write database head number: %v", err)
-			}
-			if err := WriteHeadBlockHash(bc.chainDb, block.Hash()); err != nil {
-				glog.Fatalf("failed to write database head hash: %v", err)
-			}
-			bc.currentBlock = block
-			return true
-		}
-	}
-	return false
-}
-
-func (bc *ChainManager) setLastState() error {
+func (bc *BlockChain) setLastState() error {
 	head := GetHeadBlockHash(bc.chainDb)
 	if head != (common.Hash{}) {
 		block := bc.GetBlock(head)
 		if block != nil {
 			bc.currentBlock = block
-		} else {
-			glog.Infof("LastBlock (%x) not found. Recovering...\n", head)
-			if bc.recover() {
-				glog.Infof("Recover successful")
-			} else {
-				glog.Fatalf("Recover failed. Please report")
-			}
 		}
 	} else {
 		bc.Reset()
@@ -252,13 +224,13 @@ func (bc *ChainManager) setLastState() error {
 }
 
 // Reset purges the entire blockchain, restoring it to its genesis state.
-func (bc *ChainManager) Reset() {
+func (bc *BlockChain) Reset() {
 	bc.ResetWithGenesisBlock(bc.genesisBlock)
 }
 
 // ResetWithGenesisBlock purges the entire blockchain, restoring it to the
 // specified genesis state.
-func (bc *ChainManager) ResetWithGenesisBlock(genesis *types.Block) {
+func (bc *BlockChain) ResetWithGenesisBlock(genesis *types.Block) {
 	bc.mu.Lock()
 	defer bc.mu.Unlock()
 
@@ -286,7 +258,7 @@ func (bc *ChainManager) ResetWithGenesisBlock(genesis *types.Block) {
 }
 
 // Export writes the active chain to the given writer.
-func (self *ChainManager) Export(w io.Writer) error {
+func (self *BlockChain) Export(w io.Writer) error {
 	if err := self.ExportN(w, uint64(0), self.currentBlock.NumberU64()); err != nil {
 		return err
 	}
@@ -294,7 +266,7 @@ func (self *ChainManager) Export(w io.Writer) error {
 }
 
 // ExportN writes a subset of the active chain to the given writer.
-func (self *ChainManager) ExportN(w io.Writer, first uint64, last uint64) error {
+func (self *BlockChain) ExportN(w io.Writer, first uint64, last uint64) error {
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
@@ -320,40 +292,28 @@ func (self *ChainManager) ExportN(w io.Writer, first uint64, last uint64) error
 
 // insert injects a block into the current chain block chain. Note, this function
 // assumes that the `mu` mutex is held!
-func (bc *ChainManager) insert(block *types.Block) {
+func (bc *BlockChain) insert(block *types.Block) {
 	// Add the block to the canonical chain number scheme and mark as the head
 	if err := WriteCanonicalHash(bc.chainDb, block.Hash(), block.NumberU64()); err != nil {
 		glog.Fatalf("failed to insert block number: %v", err)
 	}
-	if err := WriteHeadBlockHash(bc.chainDb, block.Hash()); err != nil {
-		glog.Fatalf("failed to insert block number: %v", err)
-	}
-	// Add a new restore point if we reached some limit
-	bc.checkpoint++
-	if bc.checkpoint > checkpointLimit {
-		if err := bc.chainDb.Put([]byte("checkpoint"), block.Hash().Bytes()); err != nil {
-			glog.Fatalf("failed to create checkpoint: %v", err)
-		}
-		bc.checkpoint = 0
-	}
-	// Update the internal internal state with the head block
 	bc.currentBlock = block
 }
 
 // Accessors
-func (bc *ChainManager) Genesis() *types.Block {
+func (bc *BlockChain) Genesis() *types.Block {
 	return bc.genesisBlock
 }
 
 // HasHeader checks if a block header is present in the database or not, caching
 // it if present.
-func (bc *ChainManager) HasHeader(hash common.Hash) bool {
+func (bc *BlockChain) HasHeader(hash common.Hash) bool {
 	return bc.GetHeader(hash) != nil
 }
 
 // GetHeader retrieves a block header from the database by hash, caching it if
 // found.
-func (self *ChainManager) GetHeader(hash common.Hash) *types.Header {
+func (self *BlockChain) GetHeader(hash common.Hash) *types.Header {
 	// Short circuit if the header's already in the cache, retrieve otherwise
 	if header, ok := self.headerCache.Get(hash); ok {
 		return header.(*types.Header)
@@ -369,7 +329,7 @@ func (self *ChainManager) GetHeader(hash common.Hash) *types.Header {
 
 // GetHeaderByNumber retrieves a block header from the database by number,
 // caching it (associated with its hash) if found.
-func (self *ChainManager) GetHeaderByNumber(number uint64) *types.Header {
+func (self *BlockChain) GetHeaderByNumber(number uint64) *types.Header {
 	hash := GetCanonicalHash(self.chainDb, number)
 	if hash == (common.Hash{}) {
 		return nil
@@ -379,7 +339,7 @@ func (self *ChainManager) GetHeaderByNumber(number uint64) *types.Header {
 
 // GetBody retrieves a block body (transactions and uncles) from the database by
 // hash, caching it if found.
-func (self *ChainManager) GetBody(hash common.Hash) *types.Body {
+func (self *BlockChain) GetBody(hash common.Hash) *types.Body {
 	// Short circuit if the body's already in the cache, retrieve otherwise
 	if cached, ok := self.bodyCache.Get(hash); ok {
 		body := cached.(*types.Body)
@@ -396,7 +356,7 @@ func (self *ChainManager) GetBody(hash common.Hash) *types.Body {
 
 // GetBodyRLP retrieves a block body in RLP encoding from the database by hash,
 // caching it if found.
-func (self *ChainManager) GetBodyRLP(hash common.Hash) rlp.RawValue {
+func (self *BlockChain) GetBodyRLP(hash common.Hash) rlp.RawValue {
 	// Short circuit if the body's already in the cache, retrieve otherwise
 	if cached, ok := self.bodyRLPCache.Get(hash); ok {
 		return cached.(rlp.RawValue)
@@ -412,7 +372,7 @@ func (self *ChainManager) GetBodyRLP(hash common.Hash) rlp.RawValue {
 
 // GetTd retrieves a block's total difficulty in the canonical chain from the
 // database by hash, caching it if found.
-func (self *ChainManager) GetTd(hash common.Hash) *big.Int {
+func (self *BlockChain) GetTd(hash common.Hash) *big.Int {
 	// Short circuit if the td's already in the cache, retrieve otherwise
 	if cached, ok := self.tdCache.Get(hash); ok {
 		return cached.(*big.Int)
@@ -428,12 +388,12 @@ func (self *ChainManager) GetTd(hash common.Hash) *big.Int {
 
 // HasBlock checks if a block is fully present in the database or not, caching
 // it if present.
-func (bc *ChainManager) HasBlock(hash common.Hash) bool {
+func (bc *BlockChain) HasBlock(hash common.Hash) bool {
 	return bc.GetBlock(hash) != nil
 }
 
 // GetBlock retrieves a block from the database by hash, caching it if found.
-func (self *ChainManager) GetBlock(hash common.Hash) *types.Block {
+func (self *BlockChain) GetBlock(hash common.Hash) *types.Block {
 	// Short circuit if the block's already in the cache, retrieve otherwise
 	if block, ok := self.blockCache.Get(hash); ok {
 		return block.(*types.Block)
@@ -449,7 +409,7 @@ func (self *ChainManager) GetBlock(hash common.Hash) *types.Block {
 
 // GetBlockByNumber retrieves a block from the database by number, caching it
 // (associated with its hash) if found.
-func (self *ChainManager) GetBlockByNumber(number uint64) *types.Block {
+func (self *BlockChain) GetBlockByNumber(number uint64) *types.Block {
 	hash := GetCanonicalHash(self.chainDb, number)
 	if hash == (common.Hash{}) {
 		return nil
@@ -459,7 +419,7 @@ func (self *ChainManager) GetBlockByNumber(number uint64) *types.Block {
 
 // GetBlockHashesFromHash retrieves a number of block hashes starting at a given
 // hash, fetching towards the genesis block.
-func (self *ChainManager) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
+func (self *BlockChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
 	// Get the origin header from which to fetch
 	header := self.GetHeader(hash)
 	if header == nil {
@@ -481,7 +441,7 @@ func (self *ChainManager) GetBlockHashesFromHash(hash common.Hash, max uint64) [
 
 // [deprecated by eth/62]
 // GetBlocksFromHash returns the block corresponding to hash and up to n-1 ancestors.
-func (self *ChainManager) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block) {
+func (self *BlockChain) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block) {
 	for i := 0; i < n; i++ {
 		block := self.GetBlock(hash)
 		if block == nil {
@@ -493,7 +453,7 @@ func (self *ChainManager) GetBlocksFromHash(hash common.Hash, n int) (blocks []*
 	return
 }
 
-func (self *ChainManager) GetUnclesInChain(block *types.Block, length int) (uncles []*types.Header) {
+func (self *BlockChain) GetUnclesInChain(block *types.Block, length int) (uncles []*types.Header) {
 	for i := 0; block != nil && i < length; i++ {
 		uncles = append(uncles, block.Uncles()...)
 		block = self.GetBlock(block.ParentHash())
@@ -504,11 +464,11 @@ func (self *ChainManager) GetUnclesInChain(block *types.Block, length int) (uncl
 
 // setTotalDifficulty updates the TD of the chain manager. Note, this function
 // assumes that the `mu` mutex is held!
-func (bc *ChainManager) setTotalDifficulty(td *big.Int) {
+func (bc *BlockChain) setTotalDifficulty(td *big.Int) {
 	bc.td = new(big.Int).Set(td)
 }
 
-func (bc *ChainManager) Stop() {
+func (bc *BlockChain) Stop() {
 	if !atomic.CompareAndSwapInt32(&bc.running, 0, 1) {
 		return
 	}
@@ -527,7 +487,7 @@ type queueEvent struct {
 	splitCount     int
 }
 
-func (self *ChainManager) procFutureBlocks() {
+func (self *BlockChain) procFutureBlocks() {
 	blocks := make([]*types.Block, self.futureBlocks.Len())
 	for i, hash := range self.futureBlocks.Keys() {
 		block, _ := self.futureBlocks.Get(hash)
@@ -549,7 +509,7 @@ const (
 )
 
 // WriteBlock writes the block to the chain.
-func (self *ChainManager) WriteBlock(block *types.Block) (status writeStatus, err error) {
+func (self *BlockChain) WriteBlock(block *types.Block) (status writeStatus, err error) {
 	self.wg.Add(1)
 	defer self.wg.Done()
 
@@ -599,7 +559,7 @@ func (self *ChainManager) WriteBlock(block *types.Block) (status writeStatus, er
 
 // InsertChain will attempt to insert the given chain in to the canonical chain or, otherwise, create a fork. It an error is returned
 // it will return the index number of the failing block as well an error describing what went wrong (for possible errors see core/errors.go).
-func (self *ChainManager) InsertChain(chain types.Blocks) (int, error) {
+func (self *BlockChain) InsertChain(chain types.Blocks) (int, error) {
 	self.wg.Add(1)
 	defer self.wg.Done()
 
@@ -730,7 +690,7 @@ func (self *ChainManager) InsertChain(chain types.Blocks) (int, error) {
 // reorgs takes two blocks, an old chain and a new chain and will reconstruct the blocks and inserts them
 // to be part of the new canonical chain and accumulates potential missing transactions and post an
 // event about them
-func (self *ChainManager) reorg(oldBlock, newBlock *types.Block) error {
+func (self *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
 	self.mu.Lock()
 	defer self.mu.Unlock()
 
@@ -811,7 +771,7 @@ func (self *ChainManager) reorg(oldBlock, newBlock *types.Block) error {
 	return nil
 }
 
-func (self *ChainManager) update() {
+func (self *BlockChain) update() {
 	events := self.eventMux.Subscribe(queueEvent{})
 	futureTimer := time.Tick(5 * time.Second)
 out:
diff --git a/core/chain_manager_test.go b/core/blockchain_test.go
index 40286190b..e034417ce 100644
--- a/core/chain_manager_test.go
+++ b/core/blockchain_test.go
@@ -48,19 +48,19 @@ func thePow() pow.PoW {
 	return pow
 }
 
-func theChainManager(db ethdb.Database, t *testing.T) *ChainManager {
+func theBlockChain(db ethdb.Database, t *testing.T) *BlockChain {
 	var eventMux event.TypeMux
 	WriteTestNetGenesisBlock(db, 0)
-	chainMan, err := NewChainManager(db, thePow(), &eventMux)
+	blockchain, err := NewBlockChain(db, thePow(), &eventMux)
 	if err != nil {
 		t.Error("failed creating chainmanager:", err)
 		t.FailNow()
 		return nil
 	}
-	blockMan := NewBlockProcessor(db, nil, chainMan, &eventMux)
-	chainMan.SetProcessor(blockMan)
+	blockMan := NewBlockProcessor(db, nil, blockchain, &eventMux)
+	blockchain.SetProcessor(blockMan)
 
-	return chainMan
+	return blockchain
 }
 
 // Test fork of length N starting from block i
@@ -104,7 +104,7 @@ func testFork(t *testing.T, bman *BlockProcessor, i, N int, f func(td1, td2 *big
 	// Loop over parents making sure reconstruction is done properly
 }
 
-func printChain(bc *ChainManager) {
+func printChain(bc *BlockChain) {
 	for i := bc.CurrentBlock().Number().Uint64(); i > 0; i-- {
 		b := bc.GetBlockByNumber(uint64(i))
 		fmt.Printf("\t%x %v\n", b.Hash(), b.Difficulty())
@@ -144,8 +144,8 @@ func loadChain(fn string, t *testing.T) (types.Blocks, error) {
 	return chain, nil
 }
 
-func insertChain(done chan bool, chainMan *ChainManager, chain types.Blocks, t *testing.T) {
-	_, err := chainMan.InsertChain(chain)
+func insertChain(done chan bool, blockchain *BlockChain, chain types.Blocks, t *testing.T) {
+	_, err := blockchain.InsertChain(chain)
 	if err != nil {
 		fmt.Println(err)
 		t.FailNow()
@@ -294,23 +294,23 @@ func TestChainInsertions(t *testing.T) {
 		t.FailNow()
 	}
 
-	chainMan := theChainManager(db, t)
+	blockchain := theBlockChain(db, t)
 
 	const max = 2
 	done := make(chan bool, max)
 
-	go insertChain(done, chainMan, chain1, t)
-	go insertChain(done, chainMan, chain2, t)
+	go insertChain(done, blockchain, chain1, t)
+	go insertChain(done, blockchain, chain2, t)
 
 	for i := 0; i < max; i++ {
 		<-done
 	}
 
-	if chain2[len(chain2)-1].Hash() != chainMan.CurrentBlock().Hash() {
+	if chain2[len(chain2)-1].Hash() != blockchain.CurrentBlock().Hash() {
 		t.Error("chain2 is canonical and shouldn't be")
 	}
 
-	if chain1[len(chain1)-1].Hash() != chainMan.CurrentBlock().Hash() {
+	if chain1[len(chain1)-1].Hash() != blockchain.CurrentBlock().Hash() {
 		t.Error("chain1 isn't canonical and should be")
 	}
 }
@@ -337,7 +337,7 @@ func TestChainMultipleInsertions(t *testing.T) {
 		}
 	}
 
-	chainMan := theChainManager(db, t)
+	blockchain := theBlockChain(db, t)
 
 	done := make(chan bool, max)
 	for i, chain := range chains {
@@ -345,7 +345,7 @@ func TestChainMultipleInsertions(t *testing.T) {
 		i := i
 		chain := chain
 		go func() {
-			insertChain(done, chainMan, chain, t)
+			insertChain(done, blockchain, chain, t)
 			fmt.Println(i, "done")
 		}()
 	}
@@ -354,7 +354,7 @@ func TestChainMultipleInsertions(t *testing.T) {
 		<-done
 	}
 
-	if chains[longest][len(chains[longest])-1].Hash() != chainMan.CurrentBlock().Hash() {
+	if chains[longest][len(chains[longest])-1].Hash() != blockchain.CurrentBlock().Hash() {
 		t.Error("Invalid canonical chain")
 	}
 }
@@ -382,9 +382,9 @@ func makeChainWithDiff(genesis *types.Block, d []int, seed byte) []*types.Block
 	return chain
 }
 
-func chm(genesis *types.Block, db ethdb.Database) *ChainManager {
+func chm(genesis *types.Block, db ethdb.Database) *BlockChain {
 	var eventMux event.TypeMux
-	bc := &ChainManager{chainDb: db, genesisBlock: genesis, eventMux: &eventMux, pow: FakePow{}}
+	bc := &BlockChain{chainDb: db, genesisBlock: genesis, eventMux: &eventMux, pow: FakePow{}}
 	bc.headerCache, _ = lru.New(100)
 	bc.bodyCache, _ = lru.New(100)
 	bc.bodyRLPCache, _ = lru.New(100)
@@ -459,7 +459,7 @@ func TestReorgBadHashes(t *testing.T) {
 	BadHashes[chain[3].Header().Hash()] = true
 
 	var eventMux event.TypeMux
-	ncm, err := NewChainManager(db, FakePow{}, &eventMux)
+	ncm, err := NewBlockChain(db, FakePow{}, &eventMux)
 	if err != nil {
 		t.Errorf("NewChainManager err: %s", err)
 	}
@@ -593,7 +593,7 @@ func TestChainTxReorgs(t *testing.T) {
 	})
 	// Import the chain. This runs all block validation rules.
 	evmux := &event.TypeMux{}
-	chainman, _ := NewChainManager(db, FakePow{}, evmux)
+	chainman, _ := NewBlockChain(db, FakePow{}, evmux)
 	chainman.SetProcessor(NewBlockProcessor(db, FakePow{}, chainman, evmux))
 	if i, err := chainman.InsertChain(chain); err != nil {
 		t.Fatalf("failed to insert original chain[%d]: %v", i, err)
diff --git a/core/chain_makers.go b/core/chain_makers.go
index 3af9b0b89..ba09b3029 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -153,7 +153,7 @@ func (b *BlockGen) OffsetTime(seconds int64) {
 // and their coinbase will be the zero address.
 //
 // Blocks created by GenerateChain do not contain valid proof of work
-// values. Inserting them into ChainManager requires use of FakePow or
+// values. Inserting them into BlockChain requires use of FakePow or
 // a similar non-validating proof of work implementation.
 func GenerateChain(parent *types.Block, db ethdb.Database, n int, gen func(int, *BlockGen)) []*types.Block {
 	statedb := state.New(parent.Root(), db)
@@ -205,7 +205,7 @@ func newCanonical(n int, db ethdb.Database) (*BlockProcessor, error) {
 	evmux := &event.TypeMux{}
 
 	WriteTestNetGenesisBlock(db, 0)
-	chainman, _ := NewChainManager(db, FakePow{}, evmux)
+	chainman, _ := NewBlockChain(db, FakePow{}, evmux)
 	bman := NewBlockProcessor(db, FakePow{}, chainman, evmux)
 	bman.bc.SetProcessor(bman)
 	parent := bman.bc.CurrentBlock()
diff --git a/core/chain_makers_test.go b/core/chain_makers_test.go
index ac18e5e0b..b33af8d87 100644
--- a/core/chain_makers_test.go
+++ b/core/chain_makers_test.go
@@ -77,7 +77,7 @@ func ExampleGenerateChain() {
 
 	// Import the chain. This runs all block validation rules.
 	evmux := &event.TypeMux{}
-	chainman, _ := NewChainManager(db, FakePow{}, evmux)
+	chainman, _ := NewBlockChain(db, FakePow{}, evmux)
 	chainman.SetProcessor(NewBlockProcessor(db, FakePow{}, chainman, evmux))
 	if i, err := chainman.InsertChain(chain); err != nil {
 		fmt.Printf("insert error (block %d): %v\n", i, err)
diff --git a/core/helper_test.go b/core/helper_test.go
index 81ea6fc22..fd6a5491c 100644
--- a/core/helper_test.go
+++ b/core/helper_test.go
@@ -34,7 +34,7 @@ type TestManager struct {
 
 	db         ethdb.Database
 	txPool     *TxPool
-	blockChain *ChainManager
+	blockChain *BlockChain
 	Blocks     []*types.Block
 }
 
@@ -54,7 +54,7 @@ func (s *TestManager) Peers() *list.List {
 	return list.New()
 }
 
-func (s *TestManager) ChainManager() *ChainManager {
+func (s *TestManager) BlockChain() *BlockChain {
 	return s.blockChain
 }
 
@@ -89,7 +89,7 @@ func NewTestManager() *TestManager {
 	testManager.eventMux = new(event.TypeMux)
 	testManager.db = db
 	// testManager.txPool = NewTxPool(testManager)
-	// testManager.blockChain = NewChainManager(testManager)
+	// testManager.blockChain = NewBlockChain(testManager)
 	// testManager.stateManager = NewStateManager(testManager)
 
 	return testManager
diff --git a/core/manager.go b/core/manager.go
index 0f108a6de..289c87c11 100644
--- a/core/manager.go
+++ b/core/manager.go
@@ -26,7 +26,7 @@ import (
 type Backend interface {
 	AccountManager() *accounts.Manager
 	BlockProcessor() *BlockProcessor
-	ChainManager() *ChainManager
+	BlockChain() *BlockChain
 	TxPool() *TxPool
 	ChainDb() ethdb.Database
 	DappDb() ethdb.Database
diff --git a/core/vm/common.go b/core/vm/common.go
index b52b598ba..2d1aa9332 100644
--- a/core/vm/common.go
+++ b/core/vm/common.go
@@ -38,7 +38,7 @@ const (
 )
 
 var (
-	Pow256 = common.BigPow(2, 256) // Pew256 is 2**256
+	Pow256 = common.BigPow(2, 256) // Pow256 is 2**256
 
 	U256 = common.U256 // Shortcut to common.U256
 	S256 = common.S256 // Shortcut to common.S256
@@ -46,7 +46,7 @@ var (
 	Zero = common.Big0 // Shortcut to common.Big0
 	One  = common.Big1 // Shortcut to common.Big1
 
-	max = big.NewInt(math.MaxInt64) // Maximum 256 bit integer
+	max = big.NewInt(math.MaxInt64) // Maximum 64 bit integer
 )
 
 // NewVm returns a new VM based on the Environment
diff --git a/core/vm/contract.go b/core/vm/contract.go
index 8460cc47b..95417e747 100644
--- a/core/vm/contract.go
+++ b/core/vm/contract.go
@@ -118,8 +118,8 @@ func (self *Contract) SetCode(code []byte) {
 	self.Code = code
 }
 
-// SetCallCode sets the address of the code address and sets the code
-// of the contract according to the backing database.
+// SetCallCode sets the code of the contract and address of the backing data
+// object
 func (self *Contract) SetCallCode(addr *common.Address, code []byte) {
 	self.Code = code
 	self.CodeAddr = addr
diff --git a/core/vm/doc.go b/core/vm/doc.go
index 4deb7761d..ab87bf934 100644
--- a/core/vm/doc.go
+++ b/core/vm/doc.go
@@ -18,15 +18,15 @@
 Package vm implements the Ethereum Virtual Machine.
 
 The vm package implements two EVMs, a byte code VM and a JIT VM. The BC
-(Byte Code) VM loops over a set of bytes and executes them according to a set
-of rules defined in the Ethereum yellow paper. When the BC VM is invokes it
+(Byte Code) VM loops over a set of bytes and executes them according to the set
+of rules defined in the Ethereum yellow paper. When the BC VM is invoked it
 invokes the JIT VM in a seperate goroutine and compiles the byte code in JIT
 instructions.
 
 The JIT VM, when invoked, loops around a set of pre-defined instructions until
-it either runs of gas, causes an internel error, returns or stops. At a later
+it either runs of gas, causes an internal error, returns or stops. At a later
 stage the JIT VM will see some additional features that will cause sets of
 instructions to be compiled down to segments. Segments are sets of instructions
-that can be ran in one go saving precious time during execution.
+that can be run in one go saving precious time during execution.
 */
 package vm
diff --git a/core/vm/environment.go b/core/vm/environment.go
index 606518fd4..f8e19baea 100644
--- a/core/vm/environment.go
+++ b/core/vm/environment.go
@@ -26,7 +26,7 @@ import (
 // it's own isolated environment.
 
 // Environment is an EVM requirement and helper which allows access to outside
-// information such like states.
+// information such as states.
 type Environment interface {
 	// The state database
 	Db() Database
@@ -50,7 +50,7 @@ type Environment interface {
 	GasLimit() *big.Int
 	// Determines whether it's possible to transact
 	CanTransfer(from common.Address, balance *big.Int) bool
-	// Transfer from to to with amount set
+	// Transfers amount from one account to the other
 	Transfer(from, to Account, amount *big.Int) error
 	// Adds a LOG to the state
 	AddLog(*Log)
diff --git a/core/vm/memory.go b/core/vm/memory.go
index 101ec75cb..d01188417 100644
--- a/core/vm/memory.go
+++ b/core/vm/memory.go
@@ -18,7 +18,7 @@ package vm
 
 import "fmt"
 
-// Memory implements ethereum RAM backed by a simple byte slice
+// Memory implements a simple memory model for the ethereum virtual machine.
 type Memory struct {
 	store []byte
 }
diff --git a/core/vm_env.go b/core/vm_env.go
index dea280746..467e34c6b 100644
--- a/core/vm_env.go
+++ b/core/vm_env.go
@@ -30,13 +30,13 @@ type VMEnv struct {
 	header *types.Header
 	msg    Message
 	depth  int
-	chain  *ChainManager
+	chain  *BlockChain
 	typ    vm.Type
 	// structured logging
 	logs []vm.StructLog
 }
 
-func NewEnv(state *state.StateDB, chain *ChainManager, msg Message, header *types.Header) *VMEnv {
+func NewEnv(state *state.StateDB, chain *BlockChain, msg Message, header *types.Header) *VMEnv {
 	return &VMEnv{
 		chain:  chain,
 		state:  state,
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
diff --git a/miner/worker.go b/miner/worker.go
index 470f1f676..8be2db93e 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -100,7 +100,7 @@ type worker struct {
 	pow    pow.PoW
 
 	eth     core.Backend
-	chain   *core.ChainManager
+	chain   *core.BlockChain
 	proc    *core.BlockProcessor
 	chainDb ethdb.Database
 
@@ -131,7 +131,7 @@ func newWorker(coinbase common.Address, eth core.Backend) *worker {
 		chainDb:        eth.ChainDb(),
 		recv:           make(chan *Result, resultQueueSize),
 		gasPrice:       new(big.Int),
-		chain:          eth.ChainManager(),
+		chain:          eth.BlockChain(),
 		proc:           eth.BlockProcessor(),
 		possibleUncles: make(map[common.Hash]*types.Block),
 		coinbase:       coinbase,
diff --git a/rpc/api/admin.go b/rpc/api/admin.go
index 8af69b189..6aa04e667 100644
--- a/rpc/api/admin.go
+++ b/rpc/api/admin.go
@@ -151,7 +151,7 @@ func (self *adminApi) DataDir(req *shared.Request) (interface{}, error) {
 	return self.ethereum.DataDir, nil
 }
 
-func hasAllBlocks(chain *core.ChainManager, bs []*types.Block) bool {
+func hasAllBlocks(chain *core.BlockChain, bs []*types.Block) bool {
 	for _, b := range bs {
 		if !chain.HasBlock(b.Hash()) {
 			return false
@@ -193,10 +193,10 @@ func (self *adminApi) ImportChain(req *shared.Request) (interface{}, error) {
 			break
 		}
 		// Import the batch.
-		if hasAllBlocks(self.ethereum.ChainManager(), blocks[:i]) {
+		if hasAllBlocks(self.ethereum.BlockChain(), blocks[:i]) {
 			continue
 		}
-		if _, err := self.ethereum.ChainManager().InsertChain(blocks[:i]); err != nil {
+		if _, err := self.ethereum.BlockChain().InsertChain(blocks[:i]); err != nil {
 			return false, fmt.Errorf("invalid block %d: %v", n, err)
 		}
 	}
@@ -214,7 +214,7 @@ func (self *adminApi) ExportChain(req *shared.Request) (interface{}, error) {
 		return false, err
 	}
 	defer fh.Close()
-	if err := self.ethereum.ChainManager().Export(fh); err != nil {
+	if err := self.ethereum.BlockChain().Export(fh); err != nil {
 		return false, err
 	}
 
diff --git a/rpc/api/debug.go b/rpc/api/debug.go
index d325b1720..e193f7ad2 100644
--- a/rpc/api/debug.go
+++ b/rpc/api/debug.go
@@ -152,7 +152,7 @@ func (self *debugApi) SetHead(req *shared.Request) (interface{}, error) {
 		return nil, fmt.Errorf("block #%d not found", args.BlockNumber)
 	}
 
-	self.ethereum.ChainManager().SetHead(block)
+	self.ethereum.BlockChain().SetHead(block)
 
 	return nil, nil
 }
diff --git a/rpc/api/eth.go b/rpc/api/eth.go
index 4cd5f2695..6db006a46 100644
--- a/rpc/api/eth.go
+++ b/rpc/api/eth.go
@@ -168,7 +168,7 @@ func (self *ethApi) IsMining(req *shared.Request) (interface{}, error) {
 }
 
 func (self *ethApi) IsSyncing(req *shared.Request) (interface{}, error) {
-	current := self.ethereum.ChainManager().CurrentBlock().NumberU64()
+	current := self.ethereum.BlockChain().CurrentBlock().NumberU64()
 	origin, height := self.ethereum.Downloader().Boundaries()
 
 	if current < height {
diff --git a/tests/block_test_util.go b/tests/block_test_util.go
index 33577cf55..fb9ca16e6 100644
--- a/tests/block_test_util.go
+++ b/tests/block_test_util.go
@@ -181,7 +181,7 @@ func runBlockTest(test *BlockTest) error {
 		return fmt.Errorf("InsertPreState: %v", err)
 	}
 
-	cm := ethereum.ChainManager()
+	cm := ethereum.BlockChain()
 	validBlocks, err := test.TryBlocksInsert(cm)
 	if err != nil {
 		return err
@@ -276,7 +276,7 @@ func (t *BlockTest) InsertPreState(ethereum *eth.Ethereum) (*state.StateDB, erro
    expected we are expected to ignore it and continue processing and then validate the
    post state.
 */
-func (t *BlockTest) TryBlocksInsert(chainManager *core.ChainManager) ([]btBlock, error) {
+func (t *BlockTest) TryBlocksInsert(blockchain *core.BlockChain) ([]btBlock, error) {
 	validBlocks := make([]btBlock, 0)
 	// insert the test blocks, which will execute all transactions
 	for _, b := range t.Json.Blocks {
@@ -289,7 +289,7 @@ func (t *BlockTest) TryBlocksInsert(chainManager *core.ChainManager) ([]btBlock,
 			}
 		}
 		// RLP decoding worked, try to insert into chain:
-		_, err = chainManager.InsertChain(types.Blocks{cb})
+		_, err = blockchain.InsertChain(types.Blocks{cb})
 		if err != nil {
 			if b.BlockHeader == nil {
 				continue // OK - block is supposed to be invalid, continue with next block
@@ -426,7 +426,7 @@ func (t *BlockTest) ValidatePostState(statedb *state.StateDB) error {
 	return nil
 }
 
-func (test *BlockTest) ValidateImportedHeaders(cm *core.ChainManager, validBlocks []btBlock) error {
+func (test *BlockTest) ValidateImportedHeaders(cm *core.BlockChain, validBlocks []btBlock) error {
 	// to get constant lookup when verifying block headers by hash (some tests have many blocks)
 	bmap := make(map[string]btBlock, len(test.Json.Blocks))
 	for _, b := range validBlocks {
diff --git a/xeth/xeth.go b/xeth/xeth.go
index 9d366d215..da712a984 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -126,7 +126,7 @@ func New(ethereum *eth.Ethereum, frontend Frontend) *XEth {
 	if frontend == nil {
 		xeth.frontend = dummyFrontend{}
 	}
-	xeth.state = NewState(xeth, xeth.backend.ChainManager().State())
+	xeth.state = NewState(xeth, xeth.backend.BlockChain().State())
 
 	go xeth.start()
 
@@ -214,7 +214,7 @@ func (self *XEth) AtStateNum(num int64) *XEth {
 		if block := self.getBlockByHeight(num); block != nil {
 			st = state.New(block.Root(), self.backend.ChainDb())
 		} else {
-			st = state.New(self.backend.ChainManager().GetBlockByNumber(0).Root(), self.backend.ChainDb())
+			st = state.New(self.backend.BlockChain().GetBlockByNumber(0).Root(), self.backend.ChainDb())
 		}
 	}
 
@@ -290,19 +290,19 @@ func (self *XEth) getBlockByHeight(height int64) *types.Block {
 		num = uint64(height)
 	}
 
-	return self.backend.ChainManager().GetBlockByNumber(num)
+	return self.backend.BlockChain().GetBlockByNumber(num)
 }
 
 func (self *XEth) BlockByHash(strHash string) *Block {
 	hash := common.HexToHash(strHash)
-	block := self.backend.ChainManager().GetBlock(hash)
+	block := self.backend.BlockChain().GetBlock(hash)
 
 	return NewBlock(block)
 }
 
 func (self *XEth) EthBlockByHash(strHash string) *types.Block {
 	hash := common.HexToHash(strHash)
-	block := self.backend.ChainManager().GetBlock(hash)
+	block := self.backend.BlockChain().GetBlock(hash)
 
 	return block
 }
@@ -356,11 +356,11 @@ func (self *XEth) EthBlockByNumber(num int64) *types.Block {
 }
 
 func (self *XEth) Td(hash common.Hash) *big.Int {
-	return self.backend.ChainManager().GetTd(hash)
+	return self.backend.BlockChain().GetTd(hash)
 }
 
 func (self *XEth) CurrentBlock() *types.Block {
-	return self.backend.ChainManager().CurrentBlock()
+	return self.backend.BlockChain().CurrentBlock()
 }
 
 func (self *XEth) GetBlockReceipts(bhash common.Hash) types.Receipts {
@@ -372,7 +372,7 @@ func (self *XEth) GetTxReceipt(txhash common.Hash) *types.Receipt {
 }
 
 func (self *XEth) GasLimit() *big.Int {
-	return self.backend.ChainManager().GasLimit()
+	return self.backend.BlockChain().GasLimit()
 }
 
 func (self *XEth) Block(v interface{}) *Block {
@@ -855,7 +855,7 @@ func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr st
 	}
 
 	header := self.CurrentBlock().Header()
-	vmenv := core.NewEnv(statedb, self.backend.ChainManager(), msg, header)
+	vmenv := core.NewEnv(statedb, self.backend.BlockChain(), msg, header)
 
 	res, gas, err := core.ApplyMessage(vmenv, msg, from)
 	return common.ToHex(res), gas.String(), err