integrate blockpool into eth

- remove blockpool code
- remove blockpool integration test (kinda embarrassing)
- remove errors.go

eth/protocol.go

@@ -7,6 +7,7 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/errs"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -17,6 +18,8 @@ const (
 	NetworkId          = 0
 	ProtocolLength     = uint64(8)
 	ProtocolMaxMsgSize = 10 * 1024 * 1024
+	maxHashes          = 256
+	maxBlocks          = 64
 )
 
 // eth protocol message codes
@@ -31,6 +34,28 @@ const (
 	NewBlockMsg
 )
 
+const (
+	ErrMsgTooLarge = iota
+	ErrDecode
+	ErrInvalidMsgCode
+	ErrProtocolVersionMismatch
+	ErrNetworkIdMismatch
+	ErrGenesisBlockMismatch
+	ErrNoStatusMsg
+	ErrExtraStatusMsg
+)
+
+var errorToString = map[int]string{
+	ErrMsgTooLarge:             "Message too long",
+	ErrDecode:                  "Invalid message",
+	ErrInvalidMsgCode:          "Invalid message code",
+	ErrProtocolVersionMismatch: "Protocol version mismatch",
+	ErrNetworkIdMismatch:       "NetworkId mismatch",
+	ErrGenesisBlockMismatch:    "Genesis block mismatch",
+	ErrNoStatusMsg:             "No status message",
+	ErrExtraStatusMsg:          "Extra status message",
+}
+
 // ethProtocol represents the ethereum wire protocol
 // instance is running on each peer
 type ethProtocol struct {
@@ -40,6 +65,7 @@ type ethProtocol struct {
 	peer         *p2p.Peer
 	id           string
 	rw           p2p.MsgReadWriter
+	errors       *errs.Errors
 }
 
 // backend is the interface the ethereum protocol backend should implement
@@ -58,7 +84,7 @@ type chainManager interface {
 type blockPool interface {
 	AddBlockHashes(next func() ([]byte, bool), peerId string)
 	AddBlock(block *types.Block, peerId string)
-	AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(int, string, ...interface{})) (best bool)
+	AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(*errs.Error)) (best bool)
 	RemovePeer(peerId string)
 }
 
@@ -68,8 +94,6 @@ type newBlockMsgData struct {
 	TD    *big.Int
 }
 
-const maxHashes = 255
-
 type getBlockHashesMsgData struct {
 	Hash   []byte
 	Amount uint64
@@ -99,7 +123,11 @@ func runEthProtocol(txPool txPool, chainManager chainManager, blockPool blockPoo
 		blockPool:    blockPool,
 		rw:           rw,
 		peer:         peer,
-		id:           fmt.Sprintf("%x", id[:8]),
+		errors: &errs.Errors{
+			Package: "ETH",
+			Errors:  errorToString,
+		},
+		id: fmt.Sprintf("%x", id[:8]),
 	}
 	err = self.handleStatus()
 	if err == nil {
@@ -145,7 +173,6 @@ func (self *ethProtocol) handle() error {
 			return self.protoError(ErrDecode, "->msg %v: %v", msg, err)
 		}
 
-		//request.Amount = uint64(math.Min(float64(maxHashes), float64(request.Amount)))
 		if request.Amount > maxHashes {
 			request.Amount = maxHashes
 		}
@@ -153,7 +180,6 @@ func (self *ethProtocol) handle() error {
 		return p2p.EncodeMsg(self.rw, BlockHashesMsg, ethutil.ByteSliceToInterface(hashes)...)
 
 	case BlockHashesMsg:
-		// TODO: redo using lazy decode , this way very inefficient on known chains
 		msgStream := rlp.NewStream(msg.Payload)
 		var err error
 		var i int
@@ -191,7 +217,7 @@ func (self *ethProtocol) handle() error {
 			if block != nil {
 				blocks = append(blocks, block)
 			}
-			if i == blockHashesBatchSize {
+			if i == maxBlocks {
 				break
 			}
 		}
@@ -218,7 +244,7 @@ func (self *ethProtocol) handle() error {
 		}
 		hash := request.Block.Hash()
 		// to simplify backend interface adding a new block
-		// uses AddPeer followed by AddHashes, AddBlock only if peer is the best peer
+		// uses AddPeer followed by AddBlock only if peer is the best peer
 		// (or selected as new best peer)
 		if self.blockPool.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect) {
 			self.blockPool.AddBlock(request.Block, self.id)
@@ -277,7 +303,7 @@ func (self *ethProtocol) handleStatus() error {
 
 	_, _, genesisBlock := self.chainManager.Status()
 
-	if bytes.Compare(status.GenesisBlock, genesisBlock) != 0 {
+	if !bytes.Equal(status.GenesisBlock, genesisBlock) {
 		return self.protoError(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesisBlock)
 	}
 
@@ -297,8 +323,8 @@ func (self *ethProtocol) handleStatus() error {
 }
 
 func (self *ethProtocol) requestBlockHashes(from []byte) error {
-	self.peer.Debugf("fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
-	return p2p.EncodeMsg(self.rw, GetBlockHashesMsg, interface{}(from), uint64(blockHashesBatchSize))
+	self.peer.Debugf("fetching hashes (%d) %x...\n", maxHashes, from[0:4])
+	return p2p.EncodeMsg(self.rw, GetBlockHashesMsg, interface{}(from), uint64(maxHashes))
 }
 
 func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
@@ -306,26 +332,17 @@ func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
 	return p2p.EncodeMsg(self.rw, GetBlocksMsg, ethutil.ByteSliceToInterface(hashes)...)
 }
 
-func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *protocolError) {
-	err = ProtocolError(code, format, params...)
-	if err.Fatal() {
-		self.peer.Errorln("err %v", err)
-		// disconnect
-	} else {
-		self.peer.Debugf("fyi %v", err)
-	}
+func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *errs.Error) {
+	err = self.errors.New(code, format, params...)
+	err.Log(self.peer.Logger)
 	return
 }
 
-func (self *ethProtocol) protoErrorDisconnect(code int, format string, params ...interface{}) {
-	err := ProtocolError(code, format, params...)
+func (self *ethProtocol) protoErrorDisconnect(err *errs.Error) {
+	err.Log(self.peer.Logger)
 	if err.Fatal() {
-		self.peer.Errorln("err %v", err)
-		// disconnect
-	} else {
-		self.peer.Debugf("fyi %v", err)
+		self.peer.Disconnect(p2p.DiscSubprotocolError)
 	}
-
 }
 
 func (self *ethProtocol) propagateTxs() {