444 lines
12 KiB
Go
444 lines
12 KiB
Go
package eth
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import (
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"bytes"
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"math"
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"math/big"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// ethProtocol represents the ethereum wire protocol
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// instance is running on each peer
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type ethProtocol struct {
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txPool txPool
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chainManager chainManager
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blockPool blockPool
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peer *p2p.Peer
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id string
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rw p2p.MsgReadWriter
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}
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// backend is the interface the ethereum protocol backend should implement
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// used as an argument to EthProtocol
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type txPool interface {
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AddTransactions([]*types.Transaction)
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}
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type chainManager interface {
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GetBlockHashesFromHash(hash []byte, amount uint64) (hashes [][]byte)
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GetBlock(hash []byte) (block *types.Block)
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Status() (td *big.Int, currentBlock []byte, genesisBlock []byte)
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}
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type blockPool interface {
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AddBlockHashes(next func() ([]byte, bool), peerId string)
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AddBlock(block *types.Block, peerId string)
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AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(int, string, ...interface{})) (best bool)
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RemovePeer(peerId string)
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}
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const (
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ProtocolVersion = 43
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NetworkId = 0
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ProtocolLength = uint64(8)
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ProtocolMaxMsgSize = 10 * 1024 * 1024
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)
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// eth protocol message codes
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const (
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StatusMsg = iota
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GetTxMsg // unused
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TxMsg
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GetBlockHashesMsg
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BlockHashesMsg
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GetBlocksMsg
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BlocksMsg
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NewBlockMsg
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)
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// message structs used for rlp decoding
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type newBlockMsgData struct {
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Block *types.Block
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TD *big.Int
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}
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type getBlockHashesMsgData struct {
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Hash []byte
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<<<<<<< HEAD
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Amount uint64
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}
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// main entrypoint, wrappers starting a server running the eth protocol
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// use this constructor to attach the protocol ("class") to server caps
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// the Dev p2p layer then runs the protocol instance on each peer
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func EthProtocol(txPool txPool, chainManager chainManager, blockPool blockPool) p2p.Protocol {
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return p2p.Protocol{
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=======
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Amount uint32
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}
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// main entrypoint, wrappers starting a server running the eth protocol
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// use this constructor to attach the protocol (class) to server caps
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func EthProtocol(eth backend) *p2p.Protocol {
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return &p2p.Protocol{
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>>>>>>> initial commit for eth-p2p integration
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Name: "eth",
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Version: ProtocolVersion,
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Length: ProtocolLength,
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Run: func(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
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<<<<<<< HEAD
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return runEthProtocol(txPool, chainManager, blockPool, peer, rw)
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=======
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return runEthProtocol(eth, peer, rw)
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>>>>>>> initial commit for eth-p2p integration
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},
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}
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}
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<<<<<<< HEAD
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// the main loop that handles incoming messages
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// note RemovePeer in the post-disconnect hook
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func runEthProtocol(txPool txPool, chainManager chainManager, blockPool blockPool, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
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self := ðProtocol{
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txPool: txPool,
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chainManager: chainManager,
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blockPool: blockPool,
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rw: rw,
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peer: peer,
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id: (string)(peer.Identity().Pubkey()),
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=======
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func runEthProtocol(eth backend, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
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self := ðProtocol{
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eth: eth,
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rw: rw,
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peer: peer,
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>>>>>>> initial commit for eth-p2p integration
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}
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err = self.handleStatus()
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if err == nil {
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go func() {
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for {
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err = self.handle()
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if err != nil {
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<<<<<<< HEAD
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self.blockPool.RemovePeer(self.id)
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=======
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>>>>>>> initial commit for eth-p2p integration
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break
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}
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}
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}()
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}
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return
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}
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func (self *ethProtocol) handle() error {
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msg, err := self.rw.ReadMsg()
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if err != nil {
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return err
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}
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if msg.Size > ProtocolMaxMsgSize {
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return ProtocolError(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
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}
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// make sure that the payload has been fully consumed
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defer msg.Discard()
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switch msg.Code {
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case StatusMsg:
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return ProtocolError(ErrExtraStatusMsg, "")
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<<<<<<< HEAD
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case TxMsg:
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// TODO: rework using lazy RLP stream
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=======
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case GetTxMsg:
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txs := self.eth.GetTransactions()
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// TODO: rewrite using rlp flat
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txsInterface := make([]interface{}, len(txs))
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for i, tx := range txs {
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txsInterface[i] = tx.RlpData()
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}
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return self.rw.EncodeMsg(TxMsg, txsInterface...)
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case TxMsg:
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>>>>>>> initial commit for eth-p2p integration
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var txs []*types.Transaction
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if err := msg.Decode(&txs); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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<<<<<<< HEAD
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self.txPool.AddTransactions(txs)
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=======
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self.eth.AddTransactions(txs)
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>>>>>>> initial commit for eth-p2p integration
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case GetBlockHashesMsg:
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var request getBlockHashesMsgData
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if err := msg.Decode(&request); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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<<<<<<< HEAD
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hashes := self.chainManager.GetBlockHashesFromHash(request.Hash, request.Amount)
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=======
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hashes := self.eth.GetBlockHashes(request.Hash, request.Amount)
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>>>>>>> initial commit for eth-p2p integration
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return self.rw.EncodeMsg(BlockHashesMsg, ethutil.ByteSliceToInterface(hashes)...)
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case BlockHashesMsg:
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// TODO: redo using lazy decode , this way very inefficient on known chains
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<<<<<<< HEAD
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msgStream := rlp.NewListStream(msg.Payload, uint64(msg.Size))
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var err error
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iter := func() (hash []byte, ok bool) {
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hash, err = msgStream.Bytes()
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if err == nil {
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ok = true
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}
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return
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}
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self.blockPool.AddBlockHashes(iter, self.id)
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if err != nil && err != rlp.EOL {
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return ProtocolError(ErrDecode, "%v", err)
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}
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case GetBlocksMsg:
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=======
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// s := rlp.NewListStream(msg.Payload, uint64(msg.Size))
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var blockHashes [][]byte
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if err := msg.Decode(&blockHashes); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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fetchMore := true
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for _, hash := range blockHashes {
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fetchMore = self.eth.AddHash(hash, self.peer)
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if !fetchMore {
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break
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}
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}
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if fetchMore {
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return self.FetchHashes(blockHashes[len(blockHashes)-1])
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}
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case GetBlocksMsg:
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// Limit to max 300 blocks
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>>>>>>> initial commit for eth-p2p integration
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var blockHashes [][]byte
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if err := msg.Decode(&blockHashes); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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<<<<<<< HEAD
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max := int(math.Min(float64(len(blockHashes)), blockHashesBatchSize))
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=======
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max := int(math.Min(float64(len(blockHashes)), 300.0))
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>>>>>>> initial commit for eth-p2p integration
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var blocks []interface{}
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for i, hash := range blockHashes {
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if i >= max {
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break
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}
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<<<<<<< HEAD
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block := self.chainManager.GetBlock(hash)
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=======
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block := self.eth.GetBlock(hash)
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>>>>>>> initial commit for eth-p2p integration
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if block != nil {
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blocks = append(blocks, block.Value().Raw())
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}
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}
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return self.rw.EncodeMsg(BlocksMsg, blocks...)
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case BlocksMsg:
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<<<<<<< HEAD
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msgStream := rlp.NewListStream(msg.Payload, uint64(msg.Size))
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for {
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var block *types.Block
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if err := msgStream.Decode(&block); err != nil {
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if err == rlp.EOL {
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break
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} else {
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return ProtocolError(ErrDecode, "%v", err)
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}
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}
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self.blockPool.AddBlock(block, self.id)
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=======
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var blocks []*types.Block
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if err := msg.Decode(&blocks); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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for _, block := range blocks {
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fetchHashes, err := self.eth.AddBlock(nil, block, self.peer)
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if err != nil {
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return ProtocolError(ErrInvalidBlock, "%v", err)
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}
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if fetchHashes {
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if err := self.FetchHashes(block.Hash()); err != nil {
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return err
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}
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}
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>>>>>>> initial commit for eth-p2p integration
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}
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case NewBlockMsg:
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var request newBlockMsgData
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if err := msg.Decode(&request); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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<<<<<<< HEAD
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hash := request.Block.Hash()
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// to simplify backend interface adding a new block
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// uses AddPeer followed by AddHashes, AddBlock only if peer is the best peer
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// (or selected as new best peer)
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if self.blockPool.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect) {
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called := true
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iter := func() (hash []byte, ok bool) {
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if called {
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called = false
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return hash, true
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} else {
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return
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}
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}
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self.blockPool.AddBlockHashes(iter, self.id)
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self.blockPool.AddBlock(request.Block, self.id)
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=======
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var fetchHashes bool
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// this should reset td and offer blockpool as candidate new peer?
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if fetchHashes, err = self.eth.AddBlock(request.TD, request.Block, self.peer); err != nil {
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return ProtocolError(ErrInvalidBlock, "%v", err)
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}
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if fetchHashes {
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return self.FetchHashes(request.Block.Hash())
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>>>>>>> initial commit for eth-p2p integration
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}
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default:
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return ProtocolError(ErrInvalidMsgCode, "%v", msg.Code)
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}
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return nil
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}
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type statusMsgData struct {
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ProtocolVersion uint
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NetworkId uint
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TD *big.Int
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CurrentBlock []byte
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GenesisBlock []byte
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}
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func (self *ethProtocol) statusMsg() p2p.Msg {
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<<<<<<< HEAD
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td, currentBlock, genesisBlock := self.chainManager.Status()
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=======
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td, currentBlock, genesisBlock := self.eth.Status()
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>>>>>>> initial commit for eth-p2p integration
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return p2p.NewMsg(StatusMsg,
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uint32(ProtocolVersion),
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uint32(NetworkId),
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td,
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currentBlock,
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genesisBlock,
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)
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}
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func (self *ethProtocol) handleStatus() error {
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// send precanned status message
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if err := self.rw.WriteMsg(self.statusMsg()); err != nil {
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return err
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}
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// read and handle remote status
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msg, err := self.rw.ReadMsg()
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if err != nil {
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return err
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}
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if msg.Code != StatusMsg {
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return ProtocolError(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
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}
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if msg.Size > ProtocolMaxMsgSize {
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return ProtocolError(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
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}
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var status statusMsgData
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if err := msg.Decode(&status); err != nil {
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return ProtocolError(ErrDecode, "%v", err)
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}
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<<<<<<< HEAD
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_, _, genesisBlock := self.chainManager.Status()
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=======
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_, _, genesisBlock := self.eth.Status()
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>>>>>>> initial commit for eth-p2p integration
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if bytes.Compare(status.GenesisBlock, genesisBlock) != 0 {
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return ProtocolError(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesisBlock)
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}
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if status.NetworkId != NetworkId {
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return ProtocolError(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, NetworkId)
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}
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if ProtocolVersion != status.ProtocolVersion {
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return ProtocolError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, ProtocolVersion)
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}
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<<<<<<< HEAD
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self.peer.Infof("Peer is [eth] capable (%d/%d). TD = %v ~ %x", status.ProtocolVersion, status.NetworkId, status.CurrentBlock)
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self.blockPool.AddPeer(status.TD, status.CurrentBlock, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect)
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=======
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logger.Infof("Peer is [eth] capable (%d/%d). TD = %v ~ %x", status.ProtocolVersion, status.NetworkId, status.CurrentBlock)
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if self.eth.AddPeer(status.TD, status.CurrentBlock, self.peer) {
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return self.FetchHashes(status.CurrentBlock)
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}
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>>>>>>> initial commit for eth-p2p integration
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return nil
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}
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<<<<<<< HEAD
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func (self *ethProtocol) requestBlockHashes(from []byte) error {
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self.peer.Debugf("fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
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return self.rw.EncodeMsg(GetBlockHashesMsg, from, blockHashesBatchSize)
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}
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func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
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self.peer.Debugf("fetching %v blocks", len(hashes))
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return self.rw.EncodeMsg(GetBlocksMsg, ethutil.ByteSliceToInterface(hashes))
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}
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func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *protocolError) {
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err = ProtocolError(code, format, params...)
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if err.Fatal() {
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self.peer.Errorln(err)
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} else {
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self.peer.Debugln(err)
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}
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return
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}
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func (self *ethProtocol) protoErrorDisconnect(code int, format string, params ...interface{}) {
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err := ProtocolError(code, format, params...)
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if err.Fatal() {
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self.peer.Errorln(err)
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// disconnect
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} else {
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self.peer.Debugln(err)
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}
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}
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=======
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func (self *ethProtocol) FetchHashes(from []byte) error {
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logger.Debugf("Fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
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return self.rw.EncodeMsg(GetBlockHashesMsg, from, blockHashesBatchSize)
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}
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>>>>>>> initial commit for eth-p2p integration
|