Exemplo n.º 1
0
// 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)
			}
		}
	}
}
Exemplo n.º 2
0
// demoteUnexecutables removes invalid and processed transactions from the pools
// executable/pending queue and any subsequent transactions that become unexecutable
// are moved back into the future queue.
func (pool *TxPool) demoteUnexecutables() {
	// Retrieve the current state to allow nonce and balance checking
	state, err := pool.currentState()
	if err != nil {
		glog.V(logger.Info).Infoln("failed to get current state: %v", err)
		return
	}
	// Iterate over all accounts and demote any non-executable transactions
	for addr, list := range pool.pending {
		nonce := state.GetNonce(addr)

		// Drop all transactions that are deemed too old (low nonce)
		for _, tx := range list.Forward(nonce) {
			if glog.V(logger.Core) {
				glog.Infof("Removed old pending transaction: %v", tx)
			}
			delete(pool.all, tx.Hash())
		}
		// Drop all transactions that are too costly (low balance), and queue any invalids back for later
		drops, invalids := list.Filter(state.GetBalance(addr))
		for _, tx := range drops {
			if glog.V(logger.Core) {
				glog.Infof("Removed unpayable pending transaction: %v", tx)
			}
			delete(pool.all, tx.Hash())
		}
		for _, tx := range invalids {
			if glog.V(logger.Core) {
				glog.Infof("Demoting pending transaction: %v", tx)
			}
			pool.enqueueTx(tx.Hash(), tx)
		}
		// Delete the entire queue entry if it became empty.
		if list.Empty() {
			delete(pool.pending, addr)
			delete(pool.beats, addr)
		}
	}
}
Exemplo n.º 3
0
// promoteExecutables moves transactions that have become processable from the
// future queue to the set of pending transactions. During this process, all
// invalidated transactions (low nonce, low balance) are deleted.
func (pool *TxPool) promoteExecutables() {
	// Init delayed since tx pool could have been started before any state sync
	if pool.pendingState == nil {
		pool.resetState()
	}
	// Retrieve the current state to allow nonce and balance checking
	state, err := pool.currentState()
	if err != nil {
		glog.Errorf("Could not get current state: %v", err)
		return
	}
	// Iterate over all accounts and promote any executable transactions
	queued := uint64(0)

	for addr, list := range pool.queue {
		// Drop all transactions that are deemed too old (low nonce)
		for _, tx := range list.Forward(state.GetNonce(addr)) {
			if glog.V(logger.Core) {
				glog.Infof("Removed old queued transaction: %v", tx)
			}
			delete(pool.all, tx.Hash())
		}
		// Drop all transactions that are too costly (low balance)
		drops, _ := list.Filter(state.GetBalance(addr))
		for _, tx := range drops {
			if glog.V(logger.Core) {
				glog.Infof("Removed unpayable queued transaction: %v", tx)
			}
			delete(pool.all, tx.Hash())
		}
		// Gather all executable transactions and promote them
		for _, tx := range list.Ready(pool.pendingState.GetNonce(addr)) {
			if glog.V(logger.Core) {
				glog.Infof("Promoting queued transaction: %v", tx)
			}
			pool.promoteTx(addr, tx.Hash(), tx)
		}
		// Drop all transactions over the allowed limit
		for _, tx := range list.Cap(int(maxQueuedPerAccount)) {
			if glog.V(logger.Core) {
				glog.Infof("Removed cap-exceeding queued transaction: %v", tx)
			}
			delete(pool.all, tx.Hash())
		}
		queued += uint64(list.Len())

		// Delete the entire queue entry if it became empty.
		if list.Empty() {
			delete(pool.queue, addr)
		}
	}
	// If we've queued more transactions than the hard limit, drop oldest ones
	if queued > maxQueuedInTotal {
		// Sort all accounts with queued transactions by heartbeat
		addresses := make(addresssByHeartbeat, 0, len(pool.queue))
		for addr, _ := range pool.queue {
			addresses = append(addresses, addressByHeartbeat{addr, pool.beats[addr]})
		}
		sort.Sort(addresses)

		// Drop transactions until the total is below the limit
		for drop := queued - maxQueuedInTotal; drop > 0; {
			addr := addresses[len(addresses)-1]
			list := pool.queue[addr.address]

			addresses = addresses[:len(addresses)-1]

			// Drop all transactions if they are less than the overflow
			if size := uint64(list.Len()); size <= drop {
				for _, tx := range list.Flatten() {
					pool.removeTx(tx.Hash())
				}
				drop -= size
				continue
			}
			// Otherwise drop only last few transactions
			txs := list.Flatten()
			for i := len(txs) - 1; i >= 0 && drop > 0; i-- {
				pool.removeTx(txs[i].Hash())
				drop--
			}
		}
	}
}
Exemplo n.º 4
0
func testGetNodeData(t *testing.T, protocol int) {
	// Define three accounts to simulate transactions with
	acc1Key, _ := crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
	acc2Key, _ := crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
	acc1Addr := crypto.PubkeyToAddress(acc1Key.PublicKey)
	acc2Addr := crypto.PubkeyToAddress(acc2Key.PublicKey)

	// Create a chain generator with some simple transactions (blatantly stolen from @fjl/chain_makerts_test)
	generator := func(i int, block *core.BlockGen) {
		switch i {
		case 0:
			// In block 1, the test bank sends account #1 some ether.
			tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(testBankKey)
			block.AddTx(tx)
		case 1:
			// In block 2, the test bank sends some more ether to account #1.
			// acc1Addr passes it on to account #2.
			tx1, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(testBankKey)
			tx2, _ := types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(acc1Key)
			block.AddTx(tx1)
			block.AddTx(tx2)
		case 2:
			// Block 3 is empty but was mined by account #2.
			block.SetCoinbase(acc2Addr)
			block.SetExtra([]byte("yeehaw"))
		case 3:
			// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
			b2 := block.PrevBlock(1).Header()
			b2.Extra = []byte("foo")
			block.AddUncle(b2)
			b3 := block.PrevBlock(2).Header()
			b3.Extra = []byte("foo")
			block.AddUncle(b3)
		}
	}
	// Assemble the test environment
	pm := newTestProtocolManagerMust(t, false, 4, generator, nil)
	peer, _ := newTestPeer("peer", protocol, pm, true)
	defer peer.close()

	// Fetch for now the entire chain db
	hashes := []common.Hash{}
	for _, key := range pm.chaindb.(*ethdb.MemDatabase).Keys() {
		if len(key) == len(common.Hash{}) {
			hashes = append(hashes, common.BytesToHash(key))
		}
	}
	p2p.Send(peer.app, 0x0d, hashes)
	msg, err := peer.app.ReadMsg()
	if err != nil {
		t.Fatalf("failed to read node data response: %v", err)
	}
	if msg.Code != 0x0e {
		t.Fatalf("response packet code mismatch: have %x, want %x", msg.Code, 0x0c)
	}
	var data [][]byte
	if err := msg.Decode(&data); err != nil {
		t.Fatalf("failed to decode response node data: %v", err)
	}
	// Verify that all hashes correspond to the requested data, and reconstruct a state tree
	for i, want := range hashes {
		if hash := crypto.Sha3Hash(data[i]); hash != want {
			fmt.Errorf("data hash mismatch: have %x, want %x", hash, want)
		}
	}
	statedb, _ := ethdb.NewMemDatabase()
	for i := 0; i < len(data); i++ {
		statedb.Put(hashes[i].Bytes(), data[i])
	}
	accounts := []common.Address{testBankAddress, acc1Addr, acc2Addr}
	for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
		trie, _ := state.New(pm.blockchain.GetBlockByNumber(i).Root(), statedb)

		for j, acc := range accounts {
			state, _ := pm.blockchain.State()
			bw := state.GetBalance(acc)
			bh := trie.GetBalance(acc)

			if (bw != nil && bh == nil) || (bw == nil && bh != nil) {
				t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
			}
			if bw != nil && bh != nil && bw.Cmp(bw) != 0 {
				t.Errorf("test %d, account %d: balance mismatch: have %v, want %v", i, j, bh, bw)
			}
		}
	}
}
Exemplo n.º 5
0
func (self *JitVm) Run(me, caller ContextRef, code []byte, value, gas, price *big.Int, callData []byte) (ret []byte, err error) {
	// TODO: depth is increased but never checked by VM. VM should not know about it at all.
	self.env.SetDepth(self.env.Depth() + 1)

	// TODO: Move it to Env.Call() or sth
	if Precompiled[string(me.Address())] != nil {
		// if it's address of precopiled contract
		// fallback to standard VM
		stdVm := New(self.env)
		return stdVm.Run(me, caller, code, value, gas, price, callData)
	}

	if self.me != nil {
		panic("JitVm.Run() can be called only once per JitVm instance")
	}

	self.me = me
	self.callerAddr = caller.Address()
	self.price = price

	self.data.gas = gas.Int64()
	self.data.gasPrice = price.Int64()
	self.data.callData = getDataPtr(callData)
	self.data.callDataSize = uint64(len(callData))
	self.data.address = address2llvm(self.me.Address())
	self.data.caller = address2llvm(caller.Address())
	self.data.origin = address2llvm(self.env.Origin())
	self.data.callValue = big2llvm(value)
	self.data.coinBase = address2llvm(self.env.Coinbase())
	self.data.difficulty = big2llvm(self.env.Difficulty())
	self.data.gasLimit = big2llvm(self.env.GasLimit())
	self.data.number = self.env.BlockNumber().Uint64()
	self.data.timestamp = self.env.Time()
	self.data.code = getDataPtr(code)
	self.data.codeSize = uint64(len(code))
	self.data.codeHash = hash2llvm(crypto.Sha3(code)) // TODO: Get already computed hash?

	jit := C.evmjit_create()
	retCode := C.evmjit_run(jit, unsafe.Pointer(&self.data), unsafe.Pointer(self))

	if retCode < 0 {
		err = errors.New("OOG from JIT")
		gas.SetInt64(0) // Set gas to 0, JIT does not bother
	} else {
		gas.SetInt64(self.data.gas)
		if retCode == 1 { // RETURN
			ret = C.GoBytes(unsafe.Pointer(self.data.callData), C.int(self.data.callDataSize))
		} else if retCode == 2 { // SUICIDE
			// TODO: Suicide support logic should be moved to Env to be shared by VM implementations
			state := self.Env().State()
			receiverAddr := llvm2hashRef(bswap(&self.data.address))
			receiver := state.GetOrNewStateObject(receiverAddr)
			balance := state.GetBalance(me.Address())
			receiver.AddBalance(balance)
			state.Delete(me.Address())
		}
	}

	C.evmjit_destroy(jit)
	return
}