示例#1
0
func (d *Debugger) halting(pc int, op ethvm.OpCode, mem *ethvm.Memory, stack *ethvm.Stack, stateObject *ethstate.StateObject) bool {
	d.win.Root().Call("setInstruction", pc)
	d.win.Root().Call("clearMem")
	d.win.Root().Call("clearStack")
	d.win.Root().Call("clearStorage")

	addr := 0
	for i := 0; i+32 <= mem.Len(); i += 32 {
		d.win.Root().Call("setMem", memAddr{fmt.Sprintf("%03d", addr), fmt.Sprintf("% x", mem.Data()[i:i+32])})
		addr++
	}

	for _, val := range stack.Data() {
		d.win.Root().Call("setStack", val.String())
	}

	stateObject.EachStorage(func(key string, node *ethutil.Value) {
		d.win.Root().Call("setStorage", storeVal{fmt.Sprintf("% x", key), fmt.Sprintf("% x", node.Str())})
	})

out:
	for {
		select {
		case <-d.N:
			break out
		case <-d.Q:
			d.interrupt = true
			d.clearBuffers()

			return false
		}
	}

	return true
}
示例#2
0
func (self *StateTransition) transferValue(sender, receiver *ethstate.StateObject) error {
	if sender.Balance.Cmp(self.value) < 0 {
		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
	}

	// Subtract the amount from the senders account
	sender.SubAmount(self.value)
	// Add the amount to receivers account which should conclude this transaction
	receiver.AddAmount(self.value)

	return nil
}
示例#3
0
func (self *StateManager) ProcessTransactions(coinbase *ethstate.StateObject, state *ethstate.State, block, parent *Block, txs Transactions) (Receipts, Transactions, Transactions, error) {
	var (
		receipts           Receipts
		handled, unhandled Transactions
		totalUsedGas       = big.NewInt(0)
		err                error
	)

done:
	for i, tx := range txs {
		txGas := new(big.Int).Set(tx.Gas)

		cb := state.GetStateObject(coinbase.Address())
		st := NewStateTransition(cb, tx, state, block)
		err = st.TransitionState()
		if err != nil {
			statelogger.Infoln(err)
			switch {
			case IsNonceErr(err):
				err = nil // ignore error
				continue
			case IsGasLimitErr(err):
				unhandled = txs[i:]

				break done
			default:
				statelogger.Infoln(err)
				err = nil
				//return nil, nil, nil, err
			}
		}

		// Notify all subscribers
		self.Ethereum.Reactor().Post("newTx:post", tx)

		// Update the state with pending changes
		state.Update()

		txGas.Sub(txGas, st.gas)
		accumelative := new(big.Int).Set(totalUsedGas.Add(totalUsedGas, txGas))
		receipt := &Receipt{tx, ethutil.CopyBytes(state.Root().([]byte)), accumelative}

		if i < len(block.Receipts()) {
			original := block.Receipts()[i]
			if !original.Cmp(receipt) {
				return nil, nil, nil, fmt.Errorf("err diff #%d (r) %v ~ %x  <=>  (c) %v ~ %x (%x)\n", i+1, original.CumulativeGasUsed, original.PostState[0:4], receipt.CumulativeGasUsed, receipt.PostState[0:4], receipt.Tx.Hash())
			}
		}

		receipts = append(receipts, receipt)
		handled = append(handled, tx)

		if ethutil.Config.Diff && ethutil.Config.DiffType == "all" {
			state.CreateOutputForDiff()
		}
	}

	parent.GasUsed = totalUsedGas

	return receipts, handled, unhandled, err
}
示例#4
0
func NewStateTransition(coinbase *ethstate.StateObject, tx *Transaction, state *ethstate.State, block *Block) *StateTransition {
	return &StateTransition{coinbase.Address(), tx.Recipient, tx, new(big.Int), new(big.Int).Set(tx.GasPrice), tx.Value, tx.Data, state, block, coinbase, nil, nil}
}
示例#5
0
func (self *StateTransition) TransitionState() (err error) {
	statelogger.Infof("(~) %x\n", self.tx.Hash())

	/*
		defer func() {
			if r := recover(); r != nil {
				logger.Infoln(r)
				err = fmt.Errorf("state transition err %v", r)
			}
		}()
	*/

	// XXX Transactions after this point are considered valid.
	if err = self.preCheck(); err != nil {
		return
	}

	var (
		tx       = self.tx
		sender   = self.Sender()
		receiver *ethstate.StateObject
	)

	defer self.RefundGas()

	// Increment the nonce for the next transaction
	sender.Nonce += 1

	// Transaction gas
	if err = self.UseGas(ethvm.GasTx); err != nil {
		return
	}

	// Pay data gas
	dataPrice := big.NewInt(int64(len(self.data)))
	dataPrice.Mul(dataPrice, ethvm.GasData)
	if err = self.UseGas(dataPrice); err != nil {
		return
	}

	if sender.Balance.Cmp(self.value) < 0 {
		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
	}

	var snapshot *ethstate.State
	// If the receiver is nil it's a contract (\0*32).
	if tx.CreatesContract() {
		// Subtract the (irreversible) amount from the senders account
		sender.SubAmount(self.value)

		snapshot = self.state.Copy()

		// Create a new state object for the contract
		receiver = self.MakeStateObject(self.state, tx)
		self.rec = receiver
		if receiver == nil {
			return fmt.Errorf("Unable to create contract")
		}

		// Add the amount to receivers account which should conclude this transaction
		receiver.AddAmount(self.value)
	} else {
		receiver = self.Receiver()

		// Subtract the amount from the senders account
		sender.SubAmount(self.value)
		// Add the amount to receivers account which should conclude this transaction
		receiver.AddAmount(self.value)

		snapshot = self.state.Copy()
	}

	msg := self.state.Manifest().AddMessage(&ethstate.Message{
		To: receiver.Address(), From: sender.Address(),
		Input:  self.tx.Data,
		Origin: sender.Address(),
		Block:  self.block.Hash(), Timestamp: self.block.Time, Coinbase: self.block.Coinbase, Number: self.block.Number,
		Value: self.value,
	})

	// Process the init code and create 'valid' contract
	if IsContractAddr(self.receiver) {
		// Evaluate the initialization script
		// and use the return value as the
		// script section for the state object.
		self.data = nil

		code, err := self.Eval(msg, receiver.Init(), receiver, "init")
		if err != nil {
			self.state.Set(snapshot)

			return fmt.Errorf("Error during init execution %v", err)
		}

		receiver.Code = code
		msg.Output = code
	} else {
		if len(receiver.Code) > 0 {
			ret, err := self.Eval(msg, receiver.Code, receiver, "code")
			if err != nil {
				self.state.Set(snapshot)

				return fmt.Errorf("Error during code execution %v", err)
			}

			msg.Output = ret
		}
	}

	return
}