package uspv import ( "fmt" "log" "os" "github.com/btcsuite/btcd/wire" ) func (s *SPVCon) incomingMessageHandler() { for { n, xm, _, err := wire.ReadMessageN(s.con, s.localVersion, s.param.Net) if err != nil { log.Printf("ReadMessageN error. Disconnecting: %s\n", err.Error()) return } s.RBytes += uint64(n) // log.Printf("Got %d byte %s message\n", n, xm.Command()) switch m := xm.(type) { case *wire.MsgVersion: log.Printf("Got version message. Agent %s, version %d, at height %d\n", m.UserAgent, m.ProtocolVersion, m.LastBlock) s.remoteVersion = uint32(m.ProtocolVersion) // weird cast! bug? case *wire.MsgVerAck: log.Printf("Got verack. Whatever.\n") case *wire.MsgAddr: log.Printf("got %d addresses.\n", len(m.AddrList)) case *wire.MsgPing: // log.Printf("Got a ping message. We should pong back or they will kick us off.") go s.PongBack(m.Nonce) case *wire.MsgPong: log.Printf("Got a pong response. OK.\n") case *wire.MsgMerkleBlock: err = s.IngestMerkleBlock(m) if err != nil { log.Printf("Merkle block error: %s\n", err.Error()) continue } case *wire.MsgHeaders: go s.HeaderHandler(m) case *wire.MsgTx: go s.TxHandler(m) case *wire.MsgReject: log.Printf("Rejected! cmd: %s code: %s tx: %s reason: %s", m.Cmd, m.Code.String(), m.Hash.String(), m.Reason) case *wire.MsgInv: go s.InvHandler(m) case *wire.MsgNotFound: log.Printf("Got not found response from remote:") for i, thing := range m.InvList { log.Printf("\t$d) %s: %s", i, thing.Type, thing.Hash) } default: log.Printf("Got unknown message type %s\n", m.Command()) } } return } // this one seems kindof pointless? could get ridf of it and let // functions call WriteMessageN themselves... func (s *SPVCon) outgoingMessageHandler() { for { msg := <-s.outMsgQueue n, err := wire.WriteMessageN(s.con, msg, s.localVersion, s.param.Net) if err != nil { log.Printf("Write message error: %s", err.Error()) } s.WBytes += uint64(n) } return } // fPositiveHandler monitors false positives and when it gets enough of them, // func (s *SPVCon) fPositiveHandler() { var fpAccumulator int32 for { fpAccumulator += <-s.fPositives // blocks here if fpAccumulator > 7 { filt, err := s.TS.GimmeFilter() if err != nil { log.Printf("Filter creation error: %s\n", err.Error()) log.Printf("uhoh, crashing filter handler") return } // send filter s.SendFilter(filt) fmt.Printf("sent filter %x\n", filt.MsgFilterLoad().Filter) // clear the channel for len(s.fPositives) != 0 { fpAccumulator += <-s.fPositives } fmt.Printf("reset %d false positives\n", fpAccumulator) // reset accumulator fpAccumulator = 0 } } } func (s *SPVCon) HeaderHandler(m *wire.MsgHeaders) { moar, err := s.IngestHeaders(m) if err != nil { log.Printf("Header error: %s\n", err.Error()) return } // if we got post DB syncheight headers, get merkleblocks for them // this is always true except for first pre-birthday sync syncTip, err := s.TS.GetDBSyncHeight() if err != nil { log.Printf("Header error: %s", err.Error()) return } endPos, err := s.headerFile.Seek(0, os.SEEK_END) if err != nil { log.Printf("Header error: %s", err.Error()) return } tip := int32(endPos/80) - 1 // move back 1 header length to read // checked header lenght, start req for more if needed if moar { s.AskForHeaders() } if syncTip < tip { fmt.Printf("syncTip %d headerTip %d\n", syncTip, tip) err = s.AskForMerkBlocks(syncTip, tip) if err != nil { log.Printf("AskForMerkBlocks error: %s", err.Error()) return } } } func (s *SPVCon) TxHandler(m *wire.MsgTx) { hits, err := s.TS.AckTx(m) if err != nil { log.Printf("Incoming Tx error: %s\n", err.Error()) } if hits == 0 { log.Printf("tx %s had no hits, filter false positive.", m.TxSha().String()) s.fPositives <- 1 // add one false positive to chan } else { log.Printf("tx %s ingested and matches utxo/adrs.", m.TxSha().String()) } } func (s *SPVCon) InvHandler(m *wire.MsgInv) { log.Printf("got inv. Contains:\n") for i, thing := range m.InvList { log.Printf("\t%d)%s : %s", i, thing.Type.String(), thing.Hash.String()) if thing.Type == wire.InvTypeTx { // new tx, ingest s.TS.OKTxids[thing.Hash] = 0 // unconfirmed s.AskForTx(thing.Hash) } if thing.Type == wire.InvTypeBlock { // new block, ingest if len(s.mBlockQueue) == 0 { // don't ask directly; instead ask for header fmt.Printf("asking for headers due to inv block\n") // s.AskForHeaders() } else { fmt.Printf("inv block but ignoring, not synched\n") } } } }