Esempio n. 1
0
// Call forms a transaction from the given arguments and tries to execute it on
// a private VM with a copy of the state. Any changes are therefore only temporary
// and not part of the actual state. This allows for local execution/queries.
func (be *registryAPIBackend) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, string, error) {
	block := be.bc.CurrentBlock()
	statedb, err := state.New(block.Root(), be.chainDb)
	if err != nil {
		return "", "", err
	}

	var from *state.StateObject
	if len(fromStr) == 0 {
		accounts, err := be.am.Accounts()
		if err != nil || len(accounts) == 0 {
			from = statedb.GetOrNewStateObject(common.Address{})
		} else {
			from = statedb.GetOrNewStateObject(accounts[0].Address)
		}
	} else {
		from = statedb.GetOrNewStateObject(common.HexToAddress(fromStr))
	}

	from.SetBalance(common.MaxBig)

	msg := callmsg{
		from:     from,
		gas:      common.Big(gasStr),
		gasPrice: common.Big(gasPriceStr),
		value:    common.Big(valueStr),
		data:     common.FromHex(dataStr),
	}
	if len(toStr) > 0 {
		addr := common.HexToAddress(toStr)
		msg.to = &addr
	}

	if msg.gas.Cmp(big.NewInt(0)) == 0 {
		msg.gas = big.NewInt(50000000)
	}

	if msg.gasPrice.Cmp(big.NewInt(0)) == 0 {
		msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
	}

	header := be.bc.CurrentBlock().Header()
	vmenv := core.NewEnv(statedb, be.bc, msg, header)
	gp := new(core.GasPool).AddGas(common.MaxBig)
	res, gas, err := core.ApplyMessage(vmenv, msg, gp)

	return common.ToHex(res), gas.String(), err
}
Esempio n. 2
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
}