// BroadcastBlock will either propagate a block to a subset of it's peers, or
// will only announce it's availability (depending what's requested).
func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
hash := block.Hash()
peers := pm.peers.PeersWithoutBlock(hash)
// If propagation is requested, send to a subset of the peer
if propagate {
// Calculate the TD of the block (it's not imported yet, so block.Td is not valid)
var td *big.Int
if parent := pm.blockchain.GetBlock(block.ParentHash()); parent != nil {
td = new(big.Int).Add(block.Difficulty(), pm.blockchain.GetTd(block.ParentHash()))
} else {
glog.V(logger.Error).Infof("propagating dangling block #%d [%x]", block.NumberU64(), hash[:4])
return
}
// Send the block to a subset of our peers
transfer := peers[:int(math.Sqrt(float64(len(peers))))]
for _, peer := range transfer {
peer.SendNewBlock(block, td)
}
glog.V(logger.Detail).Infof("propagated block %x to %d peers in %v", hash[:4], len(transfer), time.Since(block.ReceivedAt))
}
// Otherwise if the block is indeed in out own chain, announce it
if pm.blockchain.HasBlock(hash) {
for _, peer := range peers {
if peer.version < eth62 {
peer.SendNewBlockHashes61([]common.Hash{hash})
} else {
peer.SendNewBlockHashes([]common.Hash{hash}, []uint64{block.NumberU64()})
}
}
glog.V(logger.Detail).Infof("announced block %x to %d peers in %v", hash[:4], len(peers), time.Since(block.ReceivedAt))
}
}
func (self *Registrar) SetHashReg(hashreg string, addr common.Address) (txhash string, err error) {
if hashreg != "" {
HashRegAddr = hashreg
} else {
if !zero.MatchString(HashRegAddr) {
return
}
nameHex, extra := encodeName(HashRegName, 2)
hashRegAbi := resolveAbi + nameHex + extra
glog.V(logger.Detail).Infof("\ncall HashRegAddr %v with %v\n", GlobalRegistrarAddr, hashRegAbi)
var res string
res, _, err = self.backend.Call("", GlobalRegistrarAddr, "", "", "", hashRegAbi)
if len(res) >= 40 {
HashRegAddr = "0x" + res[len(res)-40:len(res)]
}
if err != nil || zero.MatchString(HashRegAddr) {
if (addr == common.Address{}) {
err = fmt.Errorf("HashReg address not found and sender for creation not given")
return
}
txhash, err = self.backend.Transact(addr.Hex(), "", "", "", "", "", HashRegCode)
if err != nil {
err = fmt.Errorf("HashReg address not found and sender for creation failed: %v", err)
}
glog.V(logger.Detail).Infof("created HashRegAddr @ txhash %v\n", txhash)
} else {
glog.V(logger.Detail).Infof("HashRegAddr found at @ %v\n", HashRegAddr)
return
}
}
return
}
func (self *Registrar) SetUrlHint(urlhint string, addr common.Address) (txhash string, err error) {
if urlhint != "" {
UrlHintAddr = urlhint
} else {
if !zero.MatchString(UrlHintAddr) {
return
}
nameHex, extra := encodeName(UrlHintName, 2)
urlHintAbi := resolveAbi + nameHex + extra
glog.V(logger.Detail).Infof("UrlHint address query data: %s to %s", urlHintAbi, GlobalRegistrarAddr)
var res string
res, _, err = self.backend.Call("", GlobalRegistrarAddr, "", "", "", urlHintAbi)
if len(res) >= 40 {
UrlHintAddr = "0x" + res[len(res)-40:len(res)]
}
if err != nil || zero.MatchString(UrlHintAddr) {
if (addr == common.Address{}) {
err = fmt.Errorf("UrlHint address not found and sender for creation not given")
return
}
txhash, err = self.backend.Transact(addr.Hex(), "", "", "", "210000", "", UrlHintCode)
if err != nil {
err = fmt.Errorf("UrlHint address not found and sender for creation failed: %v", err)
}
glog.V(logger.Detail).Infof("created UrlHint @ txhash %v\n", txhash)
} else {
glog.V(logger.Detail).Infof("UrlHint found @ %v\n", HashRegAddr)
return
}
}
return
}
// wsHandshakeValidator returns a handler that verifies the origin during the
// websocket upgrade process. When a '*' is specified as an allowed origins all
// connections are accepted.
func wsHandshakeValidator(allowedOrigins []string) func(*websocket.Config, *http.Request) error {
origins := set.New()
allowAllOrigins := false
for _, origin := range allowedOrigins {
if origin == "*" {
allowAllOrigins = true
}
if origin != "" {
origins.Add(origin)
}
}
// allow localhost if no allowedOrigins are specified
if len(origins.List()) == 0 {
origins.Add("http://localhost")
if hostname, err := os.Hostname(); err == nil {
origins.Add("http://" + hostname)
}
}
glog.V(logger.Debug).Infof("Allowed origin(s) for WS RPC interface %v\n", origins.List())
f := func(cfg *websocket.Config, req *http.Request) error {
origin := req.Header.Get("Origin")
if allowAllOrigins || origins.Has(origin) {
return nil
}
glog.V(logger.Debug).Infof("origin '%s' not allowed on WS-RPC interface\n", origin)
return fmt.Errorf("origin %s not allowed", origin)
}
return f
}
func ecrecoverFunc(in []byte) []byte {
in = common.RightPadBytes(in, 128)
// "in" is (hash, v, r, s), each 32 bytes
// but for ecrecover we want (r, s, v)
r := common.BytesToBig(in[64:96])
s := common.BytesToBig(in[96:128])
// Treat V as a 256bit integer
vbig := common.Bytes2Big(in[32:64])
v := byte(vbig.Uint64())
if !crypto.ValidateSignatureValues(v, r, s) {
glog.V(logger.Debug).Infof("EC RECOVER FAIL: v, r or s value invalid")
return nil
}
// v needs to be at the end and normalized for libsecp256k1
vbignormal := new(big.Int).Sub(vbig, big.NewInt(27))
vnormal := byte(vbignormal.Uint64())
rsv := append(in[64:128], vnormal)
pubKey, err := crypto.Ecrecover(in[:32], rsv)
// make sure the public key is a valid one
if err != nil {
glog.V(logger.Error).Infof("EC RECOVER FAIL: ", err)
return nil
}
// the first byte of pubkey is bitcoin heritage
return common.LeftPadBytes(crypto.Sha3(pubKey[1:])[12:], 32)
}
// parsePersistentNodes parses a list of discovery node URLs loaded from a .json
// file from within the data directory.
func (c *Config) parsePersistentNodes(file string) []*discover.Node {
// Short circuit if no node config is present
if c.DataDir == "" {
return nil
}
path := filepath.Join(c.DataDir, file)
if _, err := os.Stat(path); err != nil {
return nil
}
// Load the nodes from the config file
blob, err := ioutil.ReadFile(path)
if err != nil {
glog.V(logger.Error).Infof("Failed to access nodes: %v", err)
return nil
}
nodelist := []string{}
if err := json.Unmarshal(blob, &nodelist); err != nil {
glog.V(logger.Error).Infof("Failed to load nodes: %v", err)
return nil
}
// Interpret the list as a discovery node array
var nodes []*discover.Node
for _, url := range nodelist {
if url == "" {
continue
}
node, err := discover.ParseNode(url)
if err != nil {
glog.V(logger.Error).Infof("Node URL %s: %v\n", url, err)
continue
}
nodes = append(nodes, node)
}
return nodes
}
// GetTransactionByHash returns the transaction for the given hash
func (s *PublicTransactionPoolAPI) GetTransactionByHash(txHash common.Hash) (*RPCTransaction, error) {
var tx *types.Transaction
var isPending bool
var err error
if tx, isPending, err = getTransaction(s.chainDb, s.txPool, txHash); err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
} else if tx == nil {
return nil, nil
}
if isPending {
return newRPCPendingTransaction(tx), nil
}
blockHash, _, _, err := getTransactionBlockData(s.chainDb, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
if block := s.bc.GetBlock(blockHash); block != nil {
return newRPCTransaction(block, txHash)
}
return nil, nil
}
// Map adds a port mapping on m and keeps it alive until c is closed.
// This function is typically invoked in its own goroutine.
func Map(m Interface, c chan struct{}, protocol string, extport, intport int, name string) {
refresh := time.NewTimer(mapUpdateInterval)
defer func() {
refresh.Stop()
glog.V(logger.Debug).Infof("deleting port mapping: %s %d -> %d (%s) using %s\n", protocol, extport, intport, name, m)
m.DeleteMapping(protocol, extport, intport)
}()
if err := m.AddMapping(protocol, intport, extport, name, mapTimeout); err != nil {
glog.V(logger.Debug).Infof("network port %s:%d could not be mapped: %v\n", protocol, intport, err)
} else {
glog.V(logger.Info).Infof("mapped network port %s:%d -> %d (%s) using %s\n", protocol, extport, intport, name, m)
}
for {
select {
case _, ok := <-c:
if !ok {
return
}
case <-refresh.C:
glog.V(logger.Detail).Infof("refresh port mapping %s:%d -> %d (%s) using %s\n", protocol, extport, intport, name, m)
if err := m.AddMapping(protocol, intport, extport, name, mapTimeout); err != nil {
glog.V(logger.Debug).Infof("network port %s:%d could not be mapped: %v\n", protocol, intport, err)
}
refresh.Reset(mapUpdateInterval)
}
}
}
// enqueue schedules a new future import operation, if the block to be imported
// has not yet been seen.
func (f *Fetcher) enqueue(peer string, block *types.Block) {
hash := block.Hash()
// Ensure the peer isn't DOSing us
count := f.queues[peer] + 1
if count > blockLimit {
glog.V(logger.Debug).Infof("Peer %s: discarded block #%d [%x…], exceeded allowance (%d)", peer, block.NumberU64(), hash.Bytes()[:4], blockLimit)
propBroadcastDOSMeter.Mark(1)
f.forgetHash(hash)
return
}
// Discard any past or too distant blocks
if dist := int64(block.NumberU64()) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist {
glog.V(logger.Debug).Infof("Peer %s: discarded block #%d [%x…], distance %d", peer, block.NumberU64(), hash.Bytes()[:4], dist)
propBroadcastDropMeter.Mark(1)
f.forgetHash(hash)
return
}
// Schedule the block for future importing
if _, ok := f.queued[hash]; !ok {
op := &inject{
origin: peer,
block: block,
}
f.queues[peer] = count
f.queued[hash] = op
f.queue.Push(op, -float32(block.NumberU64()))
if f.queueChangeHook != nil {
f.queueChangeHook(op.block.Hash(), true)
}
if glog.V(logger.Debug) {
glog.Infof("Peer %s: queued block #%d [%x…], total %v", peer, block.NumberU64(), hash.Bytes()[:4], f.queue.Size())
}
}
}
// add inserts a new envelope into the message pool to be distributed within the
// whisper network. It also inserts the envelope into the expiration pool at the
// appropriate time-stamp.
func (self *Whisper) add(envelope *Envelope) error {
self.poolMu.Lock()
defer self.poolMu.Unlock()
// short circuit when a received envelope has already expired
if envelope.Expiry <= uint32(time.Now().Unix()) {
return nil
}
// Insert the message into the tracked pool
hash := envelope.Hash()
if _, ok := self.messages[hash]; ok {
glog.V(logger.Detail).Infof("whisper envelope already cached: %x\n", envelope)
return nil
}
self.messages[hash] = envelope
// Insert the message into the expiration pool for later removal
if self.expirations[envelope.Expiry] == nil {
self.expirations[envelope.Expiry] = set.NewNonTS()
}
if !self.expirations[envelope.Expiry].Has(hash) {
self.expirations[envelope.Expiry].Add(hash)
// Notify the local node of a message arrival
go self.postEvent(envelope)
}
glog.V(logger.Detail).Infof("cached whisper envelope %x\n", envelope)
return nil
}
func (pool *TxPool) resetState() {
currentState, err := pool.currentState()
if err != nil {
glog.V(logger.Info).Infoln("failed to get current state: %v", err)
return
}
managedState := state.ManageState(currentState)
if err != nil {
glog.V(logger.Info).Infoln("failed to get managed state: %v", err)
return
}
pool.pendingState = managedState
// validate the pool of pending transactions, this will remove
// any transactions that have been included in the block or
// have been invalidated because of another transaction (e.g.
// higher gas price)
pool.validatePool()
// Loop over the pending transactions and base the nonce of the new
// pending transaction set.
for _, tx := range pool.pending {
if addr, err := tx.From(); err == nil {
// Set the nonce. Transaction nonce can never be lower
// than the state nonce; validatePool took care of that.
if pool.pendingState.GetNonce(addr) <= tx.Nonce() {
pool.pendingState.SetNonce(addr, tx.Nonce()+1)
}
}
}
// Check the queue and move transactions over to the pending if possible
// or remove those that have become invalid
pool.checkQueue()
}
// resolve attempts to find the current endpoint for the destination
// using discovery.
//
// Resolve operations are throttled with backoff to avoid flooding the
// discovery network with useless queries for nodes that don't exist.
// The backoff delay resets when the node is found.
func (t *dialTask) resolve(srv *Server) bool {
if srv.ntab == nil {
glog.V(logger.Debug).Infof("can't resolve node %x: discovery is disabled", t.dest.ID[:6])
return false
}
if t.resolveDelay == 0 {
t.resolveDelay = initialResolveDelay
}
if time.Since(t.lastResolved) < t.resolveDelay {
return false
}
resolved := srv.ntab.Resolve(t.dest.ID)
t.lastResolved = time.Now()
if resolved == nil {
t.resolveDelay *= 2
if t.resolveDelay > maxResolveDelay {
t.resolveDelay = maxResolveDelay
}
glog.V(logger.Debug).Infof("resolving node %x failed (new delay: %v)", t.dest.ID[:6], t.resolveDelay)
return false
}
// The node was found.
t.resolveDelay = initialResolveDelay
t.dest = resolved
glog.V(logger.Debug).Infof("resolved node %x: %v:%d", t.dest.ID[:6], t.dest.IP, t.dest.TCP)
return true
}
func (env *Work) commitTransactions(transactions types.Transactions, gasPrice *big.Int, bc *core.BlockChain) {
gp := new(core.GasPool).AddGas(env.header.GasLimit)
for _, tx := range transactions {
// We can skip err. It has already been validated in the tx pool
from, _ := tx.From()
// Check if it falls within margin. Txs from owned accounts are always processed.
if tx.GasPrice().Cmp(gasPrice) < 0 && !env.ownedAccounts.Has(from) {
// ignore the transaction and transactor. We ignore the transactor
// because nonce will fail after ignoring this transaction so there's
// no point
env.lowGasTransactors.Add(from)
glog.V(logger.Info).Infof("transaction(%x) below gas price (tx=%v ask=%v). All sequential txs from this address(%x) will be ignored\n", tx.Hash().Bytes()[:4], common.CurrencyToString(tx.GasPrice()), common.CurrencyToString(gasPrice), from[:4])
}
// Continue with the next transaction if the transaction sender is included in
// the low gas tx set. This will also remove the tx and all sequential transaction
// from this transactor
if env.lowGasTransactors.Has(from) {
// add tx to the low gas set. This will be removed at the end of the run
// owned accounts are ignored
if !env.ownedAccounts.Has(from) {
env.lowGasTxs = append(env.lowGasTxs, tx)
}
continue
}
// Move on to the next transaction when the transactor is in ignored transactions set
// This may occur when a transaction hits the gas limit. When a gas limit is hit and
// the transaction is processed (that could potentially be included in the block) it
// will throw a nonce error because the previous transaction hasn't been processed.
// Therefor we need to ignore any transaction after the ignored one.
if env.ignoredTransactors.Has(from) {
continue
}
env.state.StartRecord(tx.Hash(), common.Hash{}, 0)
err := env.commitTransaction(tx, bc, gp)
switch {
case core.IsGasLimitErr(err):
// ignore the transactor so no nonce errors will be thrown for this account
// next time the worker is run, they'll be picked up again.
env.ignoredTransactors.Add(from)
glog.V(logger.Detail).Infof("Gas limit reached for (%x) in this block. Continue to try smaller txs\n", from[:4])
case err != nil:
env.remove.Add(tx.Hash())
if glog.V(logger.Detail) {
glog.Infof("TX (%x) failed, will be removed: %v\n", tx.Hash().Bytes()[:4], err)
}
default:
env.tcount++
}
}
}
func (p *Peer) run() DiscReason {
var (
writeStart = make(chan struct{}, 1)
writeErr = make(chan error, 1)
readErr = make(chan error, 1)
reason DiscReason
requested bool
)
p.wg.Add(2)
go p.readLoop(readErr)
go p.pingLoop()
// Start all protocol handlers.
writeStart <- struct{}{}
p.startProtocols(writeStart, writeErr)
// Wait for an error or disconnect.
loop:
for {
select {
case err := <-writeErr:
// A write finished. Allow the next write to start if
// there was no error.
if err != nil {
glog.V(logger.Detail).Infof("%v: write error: %v\n", p, err)
reason = DiscNetworkError
break loop
}
writeStart <- struct{}{}
case err := <-readErr:
if r, ok := err.(DiscReason); ok {
glog.V(logger.Debug).Infof("%v: remote requested disconnect: %v\n", p, r)
requested = true
reason = r
} else {
glog.V(logger.Detail).Infof("%v: read error: %v\n", p, err)
reason = DiscNetworkError
}
break loop
case err := <-p.protoErr:
reason = discReasonForError(err)
glog.V(logger.Debug).Infof("%v: protocol error: %v (%v)\n", p, err, reason)
break loop
case reason = <-p.disc:
glog.V(logger.Debug).Infof("%v: locally requested disconnect: %v\n", p, reason)
break loop
}
}
close(p.closed)
p.rw.close(reason)
p.wg.Wait()
if requested {
reason = DiscRequested
}
return reason
}
func (t *udp) send(toaddr *net.UDPAddr, ptype byte, req interface{}) error {
packet, err := encodePacket(t.priv, ptype, req)
if err != nil {
return err
}
glog.V(logger.Detail).Infof(">>> %v %T\n", toaddr, req)
if _, err = t.conn.WriteToUDP(packet, toaddr); err != nil {
glog.V(logger.Detail).Infoln("UDP send failed:", err)
}
return err
}
// dial performs the actual connection attempt.
func (t *dialTask) dial(srv *Server, dest *discover.Node) bool {
addr := &net.TCPAddr{IP: dest.IP, Port: int(dest.TCP)}
glog.V(logger.Debug).Infof("dial tcp %v (%x)\n", addr, dest.ID[:6])
fd, err := srv.Dialer.Dial("tcp", addr.String())
if err != nil {
glog.V(logger.Detail).Infof("%v", err)
return false
}
mfd := newMeteredConn(fd, false)
srv.setupConn(mfd, t.flags, dest)
return true
}
func (self *StateTransition) transitionDb() (ret []byte, usedGas *big.Int, err error) {
if err = self.preCheck(); err != nil {
return
}
msg := self.msg
sender, _ := self.from() // err checked in preCheck
// Pay intrinsic gas
if err = self.useGas(IntrinsicGas(self.data)); err != nil {
return nil, nil, InvalidTxError(err)
}
vmenv := self.env
var addr common.Address
if MessageCreatesContract(msg) {
ret, addr, err = vmenv.Create(sender, self.data, self.gas, self.gasPrice, self.value)
if err == nil {
dataGas := big.NewInt(int64(len(ret)))
dataGas.Mul(dataGas, params.CreateDataGas)
if err := self.useGas(dataGas); err == nil {
self.state.SetCode(addr, ret)
} else {
ret = nil // does not affect consensus but useful for StateTests validations
glog.V(logger.Core).Infoln("Insufficient gas for creating code. Require", dataGas, "and have", self.gas)
}
}
glog.V(logger.Core).Infoln("VM create err:", err)
} else {
// Increment the nonce for the next transaction
self.state.SetNonce(sender.Address(), self.state.GetNonce(sender.Address())+1)
ret, err = vmenv.Call(sender, self.to().Address(), self.data, self.gas, self.gasPrice, self.value)
glog.V(logger.Core).Infoln("VM call err:", err)
}
if err != nil && IsValueTransferErr(err) {
return nil, nil, InvalidTxError(err)
}
// We aren't interested in errors here. Errors returned by the VM are non-consensus errors and therefor shouldn't bubble up
if err != nil {
err = nil
}
if vm.Debug {
vm.StdErrFormat(vmenv.StructLogs())
}
self.refundGas()
self.state.AddBalance(self.env.Coinbase(), new(big.Int).Mul(self.gasUsed(), self.gasPrice))
return ret, self.gasUsed(), err
}
// NewBlockChain returns a fully initialised block chain using information
// available in the database. It initialiser the default Ethereum Validator and
// Processor.
func NewBlockChain(chainDb ethdb.Database, pow pow.PoW, mux *event.TypeMux) (*BlockChain, error) {
headerCache, _ := lru.New(headerCacheLimit)
bodyCache, _ := lru.New(bodyCacheLimit)
bodyRLPCache, _ := lru.New(bodyCacheLimit)
tdCache, _ := lru.New(tdCacheLimit)
blockCache, _ := lru.New(blockCacheLimit)
futureBlocks, _ := lru.New(maxFutureBlocks)
bc := &BlockChain{
chainDb: chainDb,
eventMux: mux,
quit: make(chan struct{}),
headerCache: headerCache,
bodyCache: bodyCache,
bodyRLPCache: bodyRLPCache,
tdCache: tdCache,
blockCache: blockCache,
futureBlocks: futureBlocks,
pow: pow,
}
// Seed a fast but crypto originating random generator
seed, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64))
if err != nil {
return nil, err
}
bc.rand = mrand.New(mrand.NewSource(seed.Int64()))
bc.SetValidator(NewBlockValidator(bc, pow))
bc.SetProcessor(NewStateProcessor(bc))
bc.genesisBlock = bc.GetBlockByNumber(0)
if bc.genesisBlock == nil {
bc.genesisBlock, err = WriteDefaultGenesisBlock(chainDb)
if err != nil {
return nil, err
}
glog.V(logger.Info).Infoln("WARNING: Wrote default ethereum genesis block")
}
if err := bc.loadLastState(); err != nil {
return nil, err
}
// 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 {
if header := bc.GetHeader(hash); header != nil {
glog.V(logger.Error).Infof("Found bad hash, rewinding chain to block #%d [%x…]", header.Number, header.ParentHash[:4])
bc.SetHead(header.Number.Uint64() - 1)
glog.V(logger.Error).Infoln("Chain rewind was successful, resuming normal operation")
}
}
// Take ownership of this particular state
go bc.update()
return bc, nil
}
func (t *udp) handlePacket(from *net.UDPAddr, buf []byte) error {
packet, fromID, hash, err := decodePacket(buf)
if err != nil {
glog.V(logger.Debug).Infof("Bad packet from %v: %v\n", from, err)
return err
}
status := "ok"
if err = packet.handle(t, from, fromID, hash); err != nil {
status = err.Error()
}
glog.V(logger.Detail).Infof("<<< %v %T: %s\n", from, packet, status)
return err
}
// node retrieves a node with a given id from the database.
func (db *nodeDB) node(id NodeID) *Node {
blob, err := db.lvl.Get(makeKey(id, nodeDBDiscoverRoot), nil)
if err != nil {
glog.V(logger.Detail).Infof("failed to retrieve node %v: %v", id, err)
return nil
}
node := new(Node)
if err := rlp.DecodeBytes(blob, node); err != nil {
glog.V(logger.Warn).Infof("failed to decode node RLP: %v", err)
return nil
}
node.sha = crypto.Sha3Hash(node.ID[:])
return node
}
// generate creates the actual cache. it can be called from multiple
// goroutines. the first call will generate the cache, subsequent
// calls wait until it is generated.
func (cache *cache) generate() {
cache.gen.Do(func() {
started := time.Now()
seedHash := makeSeedHash(cache.epoch)
glog.V(logger.Debug).Infof("Generating cache for epoch %d (%x)", cache.epoch, seedHash)
size := C.ethash_get_cachesize(C.uint64_t(cache.epoch * epochLength))
if cache.test {
size = cacheSizeForTesting
}
cache.ptr = C.ethash_light_new_internal(size, (*C.ethash_h256_t)(unsafe.Pointer(&seedHash[0])))
runtime.SetFinalizer(cache, freeCache)
glog.V(logger.Debug).Infof("Done generating cache for epoch %d, it took %v", cache.epoch, time.Since(started))
})
}
// validatePool removes invalid and processed transactions from the main pool.
// If a transaction is removed for being invalid (e.g. out of funds), all sub-
// sequent (Still valid) transactions are moved back into the future queue. This
// is important to prevent a drained account from DOSing the network with non
// executable transactions.
func (pool *TxPool) validatePool() {
state, err := pool.currentState()
if err != nil {
glog.V(logger.Info).Infoln("failed to get current state: %v", err)
return
}
balanceCache := make(map[common.Address]*big.Int)
// Clean up the pending pool, accumulating invalid nonces
gaps := make(map[common.Address]uint64)
for hash, tx := range pool.pending {
sender, _ := tx.From() // err already checked
// Perform light nonce and balance validation
balance := balanceCache[sender]
if balance == nil {
balance = state.GetBalance(sender)
balanceCache[sender] = balance
}
if past := state.GetNonce(sender) > tx.Nonce(); past || balance.Cmp(tx.Cost()) < 0 {
// Remove an already past it invalidated transaction
if glog.V(logger.Core) {
glog.Infof("removed tx (%v) from pool: low tx nonce or out of funds\n", tx)
}
delete(pool.pending, hash)
// Track the smallest invalid nonce to postpone subsequent transactions
if !past {
if prev, ok := gaps[sender]; !ok || tx.Nonce() < prev {
gaps[sender] = tx.Nonce()
}
}
}
}
// Move all transactions after a gap back to the future queue
if len(gaps) > 0 {
for hash, tx := range pool.pending {
sender, _ := tx.From()
if gap, ok := gaps[sender]; ok && tx.Nonce() >= gap {
if glog.V(logger.Core) {
glog.Infof("postponed tx (%v) due to introduced gap\n", tx)
}
pool.queueTx(hash, tx)
delete(pool.pending, hash)
}
}
}
}
// GetTransactionReceipt returns the transaction receipt for the given transaction hash.
func (s *PublicTransactionPoolAPI) GetTransactionReceipt(txHash common.Hash) (map[string]interface{}, error) {
receipt := core.GetReceipt(s.chainDb, txHash)
if receipt == nil {
glog.V(logger.Debug).Infof("receipt not found for transaction %s", txHash.Hex())
return nil, nil
}
tx, _, err := getTransaction(s.chainDb, s.txPool, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
txBlock, blockIndex, index, err := getTransactionBlockData(s.chainDb, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
from, err := tx.From()
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
fields := map[string]interface{}{
"blockHash": txBlock,
"blockNumber": rpc.NewHexNumber(blockIndex),
"transactionHash": txHash,
"transactionIndex": rpc.NewHexNumber(index),
"from": from,
"to": tx.To(),
"gasUsed": rpc.NewHexNumber(receipt.GasUsed),
"cumulativeGasUsed": rpc.NewHexNumber(receipt.CumulativeGasUsed),
"contractAddress": nil,
"logs": receipt.Logs,
}
if receipt.Logs == nil {
fields["logs"] = []vm.Logs{}
}
// If the ContractAddress is 20 0x0 bytes, assume it is not a contract creation
if bytes.Compare(receipt.ContractAddress.Bytes(), bytes.Repeat([]byte{0}, 20)) != 0 {
fields["contractAddress"] = receipt.ContractAddress
}
return fields, nil
}
func (pm *ProtocolManager) Stop() {
// Showing a log message. During download / process this could actually
// take between 5 to 10 seconds and therefor feedback is required.
glog.V(logger.Info).Infoln("Stopping ethereum protocol handler...")
pm.quit = true
pm.txSub.Unsubscribe() // quits txBroadcastLoop
pm.minedBlockSub.Unsubscribe() // quits blockBroadcastLoop
close(pm.quitSync) // quits syncer, fetcher, txsyncLoop
// Wait for any process action
pm.wg.Wait()
glog.V(logger.Info).Infoln("Ethereum protocol handler stopped")
}
// Get returns the value for key stored in the trie.
// The value bytes must not be modified by the caller.
func (t *Trie) Get(key []byte) []byte {
res, err := t.TryGet(key)
if err != nil && glog.V(logger.Error) {
glog.Errorf("Unhandled trie error: %v", err)
}
return res
}
// NewInProcRPCClient will start a new RPC server for the given node and returns a client to interact with it.
func NewInProcRPCClient(stack *node.Node) *inProcClient {
server := rpc.NewServer()
offered := stack.APIs()
for _, api := range offered {
server.RegisterName(api.Namespace, api.Service)
}
web3 := node.NewPublicWeb3API(stack)
server.RegisterName("web3", web3)
var ethereum *eth.Ethereum
if err := stack.Service(ðereum); err == nil {
net := eth.NewPublicNetAPI(stack.Server(), ethereum.NetVersion())
server.RegisterName("net", net)
} else {
glog.V(logger.Warn).Infof("%v\n", err)
}
buf := &buf{
requests: make(chan []byte),
responses: make(chan []byte),
}
client := &inProcClient{
server: server,
buf: buf,
}
go func() {
server.ServeCodec(rpc.NewJSONCodec(client.buf))
}()
return client
}
// Schedule61 adds a set of hashes for the download queue for scheduling, returning
// the new hashes encountered.
func (q *queue) Schedule61(hashes []common.Hash, fifo bool) []common.Hash {
q.lock.Lock()
defer q.lock.Unlock()
// Insert all the hashes prioritised in the arrival order
inserts := make([]common.Hash, 0, len(hashes))
for _, hash := range hashes {
// Skip anything we already have
if old, ok := q.hashPool[hash]; ok {
glog.V(logger.Warn).Infof("Hash %x already scheduled at index %v", hash, old)
continue
}
// Update the counters and insert the hash
q.hashCounter = q.hashCounter + 1
inserts = append(inserts, hash)
q.hashPool[hash] = q.hashCounter
if fifo {
q.hashQueue.Push(hash, -float32(q.hashCounter)) // Lowest gets schedules first
} else {
q.hashQueue.Push(hash, float32(q.hashCounter)) // Highest gets schedules first
}
}
return inserts
}
// update keeps track of the downloader events. Please be aware that this is a one shot type of update loop.
// It's entered once and as soon as `Done` or `Failed` has been broadcasted the events are unregistered and
// the loop is exited. This to prevent a major security vuln where external parties can DOS you with blocks
// and halt your mining operation for as long as the DOS continues.
func (self *Miner) update() {
events := self.mux.Subscribe(downloader.StartEvent{}, downloader.DoneEvent{}, downloader.FailedEvent{})
out:
for ev := range events.Chan() {
switch ev.Data.(type) {
case downloader.StartEvent:
atomic.StoreInt32(&self.canStart, 0)
if self.Mining() {
self.Stop()
atomic.StoreInt32(&self.shouldStart, 1)
glog.V(logger.Info).Infoln("Mining operation aborted due to sync operation")
}
case downloader.DoneEvent, downloader.FailedEvent:
shouldStart := atomic.LoadInt32(&self.shouldStart) == 1
atomic.StoreInt32(&self.canStart, 1)
atomic.StoreInt32(&self.shouldStart, 0)
if shouldStart {
self.Start(self.coinbase, self.threads)
}
// unsubscribe. we're only interested in this event once
events.Unsubscribe()
// stop immediately and ignore all further pending events
break out
}
}
}
func (self *Iterator) key(node interface{}) []byte {
switch node := node.(type) {
case shortNode:
// Leaf node
k := remTerm(node.Key)
if vnode, ok := node.Val.(valueNode); ok {
self.Value = vnode
return k
}
return append(k, self.key(node.Val)...)
case fullNode:
if node[16] != nil {
self.Value = node[16].(valueNode)
return []byte{16}
}
for i := 0; i < 16; i++ {
k := self.key(node[i])
if k != nil {
return append([]byte{byte(i)}, k...)
}
}
case hashNode:
rn, err := self.trie.resolveHash(node, nil, nil)
if err != nil && glog.V(logger.Error) {
glog.Errorf("Unhandled trie error: %v", err)
}
return self.key(rn)
}
return nil
}
func New(solcPath string) (sol *Solidity, err error) {
// set default solc
if len(solcPath) == 0 {
solcPath = "solc"
}
solcPath, err = exec.LookPath(solcPath)
if err != nil {
return
}
cmd := exec.Command(solcPath, "--version")
var out bytes.Buffer
cmd.Stdout = &out
err = cmd.Run()
if err != nil {
return
}
fullVersion := out.String()
version := versionRegexp.FindString(fullVersion)
legacy := legacyRegexp.MatchString(version)
sol = &Solidity{
solcPath: solcPath,
version: version,
fullVersion: fullVersion,
legacy: legacy,
}
glog.V(logger.Info).Infoln(sol.Info())
return
}
