core, eth/downloader: expose the bad hashes, check in downloader

core/blocks.go

@@ -2,7 +2,8 @@ package core
 
 import "github.com/ethereum/go-ethereum/common"
 
-var badHashes = []common.Hash{
-	common.HexToHash("f269c503aed286caaa0d114d6a5320e70abbc2febe37953207e76a2873f2ba79"),
-	common.HexToHash("38f5bbbffd74804820ffa4bab0cd540e9de229725afb98c1a7e57936f4a714bc"),
+// Set of manually tracked bad hashes (usually hard forks)
+var BadHashes = map[common.Hash]bool{
+	common.HexToHash("f269c503aed286caaa0d114d6a5320e70abbc2febe37953207e76a2873f2ba79"): true,
+	common.HexToHash("38f5bbbffd74804820ffa4bab0cd540e9de229725afb98c1a7e57936f4a714bc"): true,
 }

core/chain_manager.go

@@ -121,7 +121,7 @@ func NewChainManager(blockDb, stateDb common.Database, pow pow.PoW, mux *event.T
 	bc.setLastState()
 
 	// Check the current state of the block hashes and make sure that we do not have any of the bad blocks in our chain
-	for _, hash := range badHashes {
+	for hash, _ := range BadHashes {
 		if block := bc.GetBlock(hash); block != nil {
 			glog.V(logger.Error).Infof("Found bad hash. Reorganising chain to state %x\n", block.ParentHash().Bytes()[:4])
 			block = bc.GetBlock(block.ParentHash())

core/manager.go

@@ -3,9 +3,7 @@ package core
 import (
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/eth/downloader"
 	"github.com/ethereum/go-ethereum/event"
-	"github.com/ethereum/go-ethereum/p2p"
 )
 
 // TODO move this to types?
@@ -14,11 +12,7 @@ type Backend interface {
 	BlockProcessor() *BlockProcessor
 	ChainManager() *ChainManager
 	TxPool() *TxPool
-	PeerCount() int
-	IsListening() bool
-	Peers() []*p2p.Peer
 	BlockDb() common.Database
 	StateDb() common.Database
 	EventMux() *event.TypeMux
-	Downloader() *downloader.Downloader
 }