go-pulse/eth/peer.go
obscuren d3be1a2719 eth: moved mined, tx events to protocol-hnd and improved tx propagation
Transactions are now propagated to peers from which we have not yet
received the transaction. This will significantly reduce the chatter on
the network.

Moved new mined block handler to the protocol handler and moved
transaction handling to protocol handler.
2015-04-23 11:50:12 +02:00

152 lines
3.7 KiB
Go

package eth
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/p2p"
"gopkg.in/fatih/set.v0"
)
type statusMsgData struct {
ProtocolVersion uint32
NetworkId uint32
TD *big.Int
CurrentBlock common.Hash
GenesisBlock common.Hash
}
type getBlockHashesMsgData struct {
Hash common.Hash
Amount uint64
}
type peer struct {
*p2p.Peer
rw p2p.MsgReadWriter
protv, netid int
currentHash common.Hash
id string
td *big.Int
genesis, ourHash common.Hash
ourTd *big.Int
txHashes *set.Set
blockHashes *set.Set
}
func newPeer(protv, netid int, genesis, currentHash common.Hash, td *big.Int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
id := p.ID()
return &peer{
Peer: p,
rw: rw,
genesis: genesis,
ourHash: currentHash,
ourTd: td,
protv: protv,
netid: netid,
id: fmt.Sprintf("%x", id[:8]),
txHashes: set.New(),
blockHashes: set.New(),
}
}
// sendTransactions sends transactions to the peer and includes the hashes
// in it's tx hash set for future reference. The tx hash will allow the
// manager to check whether the peer has already received this particular
// transaction
func (p *peer) sendTransactions(txs types.Transactions) error {
for _, tx := range txs {
p.txHashes.Add(tx.Hash())
}
return p2p.Send(p.rw, TxMsg, txs)
}
func (p *peer) sendBlockHashes(hashes []common.Hash) error {
return p2p.Send(p.rw, BlockHashesMsg, hashes)
}
func (p *peer) sendBlocks(blocks []*types.Block) error {
return p2p.Send(p.rw, BlocksMsg, blocks)
}
func (p *peer) sendNewBlock(block *types.Block) error {
p.blockHashes.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, block.Td})
}
func (p *peer) sendTransaction(tx *types.Transaction) error {
p.txHashes.Add(tx.Hash())
return p2p.Send(p.rw, TxMsg, []*types.Transaction{tx})
}
func (p *peer) requestHashes(from common.Hash) error {
glog.V(logger.Debug).Infof("[%s] fetching hashes (%d) %x...\n", p.id, maxHashes, from[:4])
return p2p.Send(p.rw, GetBlockHashesMsg, getBlockHashesMsgData{from, maxHashes})
}
func (p *peer) requestBlocks(hashes []common.Hash) error {
glog.V(logger.Debug).Infof("[%s] fetching %v blocks\n", p.id, len(hashes))
return p2p.Send(p.rw, GetBlocksMsg, hashes)
}
func (p *peer) handleStatus() error {
errc := make(chan error, 1)
go func() {
errc <- p2p.Send(p.rw, StatusMsg, &statusMsgData{
ProtocolVersion: uint32(p.protv),
NetworkId: uint32(p.netid),
TD: p.ourTd,
CurrentBlock: p.ourHash,
GenesisBlock: p.genesis,
})
}()
// read and handle remote status
msg, err := p.rw.ReadMsg()
if err != nil {
return err
}
if msg.Code != StatusMsg {
return errResp(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
}
if msg.Size > ProtocolMaxMsgSize {
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
}
var status statusMsgData
if err := msg.Decode(&status); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
if status.GenesisBlock != p.genesis {
return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, p.genesis)
}
if int(status.NetworkId) != p.netid {
return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, p.netid)
}
if int(status.ProtocolVersion) != p.protv {
return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.protv)
}
// Set the total difficulty of the peer
p.td = status.TD
// set the best hash of the peer
p.currentHash = status.CurrentBlock
return <-errc
}