Example #1
0
func exec(env vm.Environment, caller vm.ContractRef, address, codeAddr *common.Address, input, code []byte, gas, gasPrice, value *big.Int) (ret []byte, addr common.Address, err error) {
	evm := vm.NewVm(env)

	// Depth check execution. Fail if we're trying to execute above the
	// limit.
	if env.Depth() > int(params.CallCreateDepth.Int64()) {
		caller.ReturnGas(gas, gasPrice)

		return nil, common.Address{}, vm.DepthError
	}

	if !env.CanTransfer(caller.Address(), value) {
		caller.ReturnGas(gas, gasPrice)

		return nil, common.Address{}, ValueTransferErr("insufficient funds to transfer value. Req %v, has %v", value, env.Db().GetBalance(caller.Address()))
	}

	var createAccount bool
	if address == nil {
		// Generate a new address
		nonce := env.Db().GetNonce(caller.Address())
		env.Db().SetNonce(caller.Address(), nonce+1)

		addr = crypto.CreateAddress(caller.Address(), nonce)

		address = &addr
		createAccount = true
	}
	snapshot := env.MakeSnapshot()

	var (
		from = env.Db().GetAccount(caller.Address())
		to   vm.Account
	)
	if createAccount {
		to = env.Db().CreateAccount(*address)
	} else {
		if !env.Db().Exist(*address) {
			to = env.Db().CreateAccount(*address)
		} else {
			to = env.Db().GetAccount(*address)
		}
	}
	env.Transfer(from, to, value)

	contract := vm.NewContract(caller, to, value, gas, gasPrice)
	contract.SetCallCode(codeAddr, code)

	ret, err = evm.Run(contract, input)
	if err != nil {
		env.SetSnapshot(snapshot) //env.Db().Set(snapshot)
	}

	return ret, addr, err
}
Example #2
0
// SendTransaction will create a transaction for the given transaction argument, sign it and submit it to the
// transaction pool.
func (s *PublicTransactionPoolAPI) SendTransaction(args SendTxArgs) (common.Hash, error) {
	if args.Gas == nil {
		args.Gas = rpc.NewHexNumber(defaultGas)
	}
	if args.GasPrice == nil {
		args.GasPrice = rpc.NewHexNumber(defaultGasPrice)
	}
	if args.Value == nil {
		args.Value = rpc.NewHexNumber(0)
	}

	s.txMu.Lock()
	defer s.txMu.Unlock()

	if args.Nonce == nil {
		args.Nonce = rpc.NewHexNumber(s.txPool.State().GetNonce(args.From))
	}

	var tx *types.Transaction
	contractCreation := (args.To == common.Address{})

	if contractCreation {
		tx = types.NewContractCreation(args.Nonce.Uint64(), args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
	} else {
		tx = types.NewTransaction(args.Nonce.Uint64(), args.To, args.Value.BigInt(), args.Gas.BigInt(), args.GasPrice.BigInt(), common.FromHex(args.Data))
	}

	signedTx, err := s.sign(args.From, tx)
	if err != nil {
		return common.Hash{}, err
	}

	s.txPool.SetLocal(signedTx)
	if err := s.txPool.Add(signedTx); err != nil {
		return common.Hash{}, nil
	}

	if contractCreation {
		addr := crypto.CreateAddress(args.From, args.Nonce.Uint64())
		glog.V(logger.Info).Infof("Tx(%s) created: %s\n", signedTx.Hash().Hex(), addr.Hex())
	} else {
		glog.V(logger.Info).Infof("Tx(%s) to: %s\n", signedTx.Hash().Hex(), tx.To().Hex())
	}

	return signedTx.Hash(), nil
}
Example #3
0
// ApplyTransaction attemps to apply a transaction to the given state database
// and uses the input parameters for its environment.
//
// ApplyTransactions returns the generated receipts and vm logs during the
// execution of the state transition phase.
func ApplyTransaction(bc *BlockChain, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int) (*types.Receipt, vm.Logs, *big.Int, error) {
	_, gas, err := ApplyMessage(NewEnv(statedb, bc, tx, header), tx, gp)
	if err != nil {
		return nil, nil, nil, err
	}

	// Update the state with pending changes
	usedGas.Add(usedGas, gas)
	receipt := types.NewReceipt(statedb.IntermediateRoot().Bytes(), usedGas)
	receipt.TxHash = tx.Hash()
	receipt.GasUsed = new(big.Int).Set(gas)
	if MessageCreatesContract(tx) {
		from, _ := tx.From()
		receipt.ContractAddress = crypto.CreateAddress(from, tx.Nonce())
	}

	logs := statedb.GetLogs(tx.Hash())
	receipt.Logs = logs
	receipt.Bloom = types.CreateBloom(types.Receipts{receipt})

	glog.V(logger.Debug).Infoln(receipt)

	return receipt, logs, gas, err
}
Example #4
0
// SendRawTransaction will add the signed transaction to the transaction pool.
// The sender is responsible for signing the transaction and using the correct nonce.
func (s *PublicTransactionPoolAPI) SendRawTransaction(encodedTx string) (string, error) {
	tx := new(types.Transaction)
	if err := rlp.DecodeBytes(common.FromHex(encodedTx), tx); err != nil {
		return "", err
	}

	s.txPool.SetLocal(tx)
	if err := s.txPool.Add(tx); err != nil {
		return "", err
	}

	if tx.To() == nil {
		from, err := tx.From()
		if err != nil {
			return "", err
		}
		addr := crypto.CreateAddress(from, tx.Nonce())
		glog.V(logger.Info).Infof("Tx(%x) created: %x\n", tx.Hash(), addr)
	} else {
		glog.V(logger.Info).Infof("Tx(%x) to: %x\n", tx.Hash(), tx.To())
	}

	return tx.Hash().Hex(), nil
}
Example #5
0
// Transact forms a transaction from the given arguments and submits it to the
// transactio pool for execution.
func (be *registryAPIBackend) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
	if len(toStr) > 0 && toStr != "0x" && !common.IsHexAddress(toStr) {
		return "", errors.New("invalid address")
	}

	var (
		from             = common.HexToAddress(fromStr)
		to               = common.HexToAddress(toStr)
		value            = common.Big(valueStr)
		gas              *big.Int
		price            *big.Int
		data             []byte
		contractCreation bool
	)

	if len(gasStr) == 0 {
		gas = big.NewInt(90000)
	} else {
		gas = common.Big(gasStr)
	}

	if len(gasPriceStr) == 0 {
		price = big.NewInt(10000000000000)
	} else {
		price = common.Big(gasPriceStr)
	}

	data = common.FromHex(codeStr)
	if len(toStr) == 0 {
		contractCreation = true
	}

	nonce := be.txPool.State().GetNonce(from)
	if len(nonceStr) != 0 {
		nonce = common.Big(nonceStr).Uint64()
	}

	var tx *types.Transaction
	if contractCreation {
		tx = types.NewContractCreation(nonce, value, gas, price, data)
	} else {
		tx = types.NewTransaction(nonce, to, value, gas, price, data)
	}

	acc := accounts.Account{from}
	signature, err := be.am.Sign(acc, tx.SigHash().Bytes())
	if err != nil {
		return "", err
	}
	signedTx, err := tx.WithSignature(signature)
	if err != nil {
		return "", err
	}

	be.txPool.SetLocal(signedTx)
	if err := be.txPool.Add(signedTx); err != nil {
		return "", nil
	}

	if contractCreation {
		addr := crypto.CreateAddress(from, nonce)
		glog.V(logger.Info).Infof("Tx(%s) created: %s\n", signedTx.Hash().Hex(), addr.Hex())
	} else {
		glog.V(logger.Info).Infof("Tx(%s) to: %s\n", signedTx.Hash().Hex(), tx.To().Hex())
	}

	return signedTx.Hash().Hex(), nil
}
Example #6
0
// InsertReceiptChain attempts to complete an already existing header chain with
// transaction and receipt data.
func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain []types.Receipts) (int, error) {
	self.wg.Add(1)
	defer self.wg.Done()

	// Collect some import statistics to report on
	stats := struct{ processed, ignored int32 }{}
	start := time.Now()

	// Create the block importing task queue and worker functions
	tasks := make(chan int, len(blockChain))
	for i := 0; i < len(blockChain) && i < len(receiptChain); i++ {
		tasks <- i
	}
	close(tasks)

	errs, failed := make([]error, len(tasks)), int32(0)
	process := func(worker int) {
		for index := range tasks {
			block, receipts := blockChain[index], receiptChain[index]

			// Short circuit insertion if shutting down or processing failed
			if atomic.LoadInt32(&self.procInterrupt) == 1 {
				return
			}
			if atomic.LoadInt32(&failed) > 0 {
				return
			}
			// Short circuit if the owner header is unknown
			if !self.HasHeader(block.Hash()) {
				errs[index] = fmt.Errorf("containing header #%d [%x…] unknown", block.Number(), block.Hash().Bytes()[:4])
				atomic.AddInt32(&failed, 1)
				return
			}
			// Skip if the entire data is already known
			if self.HasBlock(block.Hash()) {
				atomic.AddInt32(&stats.ignored, 1)
				continue
			}
			// Compute all the non-consensus fields of the receipts
			transactions, logIndex := block.Transactions(), uint(0)
			for j := 0; j < len(receipts); j++ {
				// The transaction hash can be retrieved from the transaction itself
				receipts[j].TxHash = transactions[j].Hash()

				// The contract address can be derived from the transaction itself
				if MessageCreatesContract(transactions[j]) {
					from, _ := transactions[j].From()
					receipts[j].ContractAddress = crypto.CreateAddress(from, transactions[j].Nonce())
				}
				// The used gas can be calculated based on previous receipts
				if j == 0 {
					receipts[j].GasUsed = new(big.Int).Set(receipts[j].CumulativeGasUsed)
				} else {
					receipts[j].GasUsed = new(big.Int).Sub(receipts[j].CumulativeGasUsed, receipts[j-1].CumulativeGasUsed)
				}
				// The derived log fields can simply be set from the block and transaction
				for k := 0; k < len(receipts[j].Logs); k++ {
					receipts[j].Logs[k].BlockNumber = block.NumberU64()
					receipts[j].Logs[k].BlockHash = block.Hash()
					receipts[j].Logs[k].TxHash = receipts[j].TxHash
					receipts[j].Logs[k].TxIndex = uint(j)
					receipts[j].Logs[k].Index = logIndex
					logIndex++
				}
			}
			// Write all the data out into the database
			if err := WriteBody(self.chainDb, block.Hash(), &types.Body{block.Transactions(), block.Uncles()}); err != nil {
				errs[index] = fmt.Errorf("failed to write block body: %v", err)
				atomic.AddInt32(&failed, 1)
				glog.Fatal(errs[index])
				return
			}
			if err := WriteBlockReceipts(self.chainDb, block.Hash(), receipts); err != nil {
				errs[index] = fmt.Errorf("failed to write block receipts: %v", err)
				atomic.AddInt32(&failed, 1)
				glog.Fatal(errs[index])
				return
			}
			if err := WriteMipmapBloom(self.chainDb, block.NumberU64(), receipts); err != nil {
				errs[index] = fmt.Errorf("failed to write log blooms: %v", err)
				atomic.AddInt32(&failed, 1)
				glog.Fatal(errs[index])
				return
			}
			if err := WriteTransactions(self.chainDb, block); err != nil {
				errs[index] = fmt.Errorf("failed to write individual transactions: %v", err)
				atomic.AddInt32(&failed, 1)
				glog.Fatal(errs[index])
				return
			}
			if err := WriteReceipts(self.chainDb, receipts); err != nil {
				errs[index] = fmt.Errorf("failed to write individual receipts: %v", err)
				atomic.AddInt32(&failed, 1)
				glog.Fatal(errs[index])
				return
			}
			atomic.AddInt32(&stats.processed, 1)
		}
	}
	// Start as many worker threads as goroutines allowed
	pending := new(sync.WaitGroup)
	for i := 0; i < runtime.GOMAXPROCS(0); i++ {
		pending.Add(1)
		go func(id int) {
			defer pending.Done()
			process(id)
		}(i)
	}
	pending.Wait()

	// If anything failed, report
	if failed > 0 {
		for i, err := range errs {
			if err != nil {
				return i, err
			}
		}
	}
	if atomic.LoadInt32(&self.procInterrupt) == 1 {
		glog.V(logger.Debug).Infoln("premature abort during receipt chain processing")
		return 0, nil
	}
	// Update the head fast sync block if better
	self.mu.Lock()
	head := blockChain[len(errs)-1]
	if self.GetTd(self.currentFastBlock.Hash()).Cmp(self.GetTd(head.Hash())) < 0 {
		if err := WriteHeadFastBlockHash(self.chainDb, head.Hash()); err != nil {
			glog.Fatalf("failed to update head fast block hash: %v", err)
		}
		self.currentFastBlock = head
	}
	self.mu.Unlock()

	// Report some public statistics so the user has a clue what's going on
	first, last := blockChain[0], blockChain[len(blockChain)-1]
	glog.V(logger.Info).Infof("imported %d receipt(s) (%d ignored) in %v. #%d [%x… / %x…]", stats.processed, stats.ignored,
		time.Since(start), last.Number(), first.Hash().Bytes()[:4], last.Hash().Bytes()[:4])

	return 0, nil
}