269 lines
8.4 KiB
Go
269 lines
8.4 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethreg
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import (
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/compiler"
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"github.com/ethereum/go-ethereum/common/registrar"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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// registryAPIBackend is a backend for an Ethereum Registry.
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type registryAPIBackend struct {
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bc *core.BlockChain
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chainDb ethdb.Database
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txPool *core.TxPool
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am *accounts.Manager
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}
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// PrivateRegistarAPI offers various functions to access the Ethereum registry.
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type PrivateRegistarAPI struct {
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be *registryAPIBackend
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}
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// NewPrivateRegistarAPI creates a new PrivateRegistarAPI instance.
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func NewPrivateRegistarAPI(bc *core.BlockChain, chainDb ethdb.Database, txPool *core.TxPool, am *accounts.Manager) *PrivateRegistarAPI {
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return &PrivateRegistarAPI{®istryAPIBackend{bc, chainDb, txPool, am}}
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}
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// SetGlobalRegistrar allows clients to set the global registry for the node.
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// This method can be used to deploy a new registry. First zero out the current
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// address by calling the method with namereg = '0x0' and then call this method
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// again with '' as namereg. This will submit a transaction to the network which
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// will deploy a new registry on execution. The TX hash is returned. When called
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// with namereg '' and the current address is not zero the current global is
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// address is returned..
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func (api *PrivateRegistarAPI) SetGlobalRegistrar(namereg string, from common.Address) (string, error) {
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return registrar.New(api.be).SetGlobalRegistrar(namereg, from)
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}
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// SetHashReg queries the registry for a hash.
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func (api *PrivateRegistarAPI) SetHashReg(hashreg string, from common.Address) (string, error) {
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return registrar.New(api.be).SetHashReg(hashreg, from)
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}
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// SetUrlHint queries the registry for an url.
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func (api *PrivateRegistarAPI) SetUrlHint(hashreg string, from common.Address) (string, error) {
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return registrar.New(api.be).SetUrlHint(hashreg, from)
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}
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// SaveInfo stores contract information on the local file system.
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func (api *PrivateRegistarAPI) SaveInfo(info *compiler.ContractInfo, filename string) (contenthash common.Hash, err error) {
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return compiler.SaveInfo(info, filename)
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}
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// Register registers a new content hash in the registry.
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func (api *PrivateRegistarAPI) Register(sender common.Address, addr common.Address, contentHashHex string) (bool, error) {
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block := api.be.bc.CurrentBlock()
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state, err := state.New(block.Root(), api.be.chainDb)
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if err != nil {
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return false, err
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}
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codeb := state.GetCode(addr)
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codeHash := common.BytesToHash(crypto.Sha3(codeb))
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contentHash := common.HexToHash(contentHashHex)
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_, err = registrar.New(api.be).SetHashToHash(sender, codeHash, contentHash)
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return err == nil, err
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}
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// RegisterUrl registers a new url in the registry.
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func (api *PrivateRegistarAPI) RegisterUrl(sender common.Address, contentHashHex string, url string) (bool, error) {
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_, err := registrar.New(api.be).SetUrlToHash(sender, common.HexToHash(contentHashHex), url)
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return err == nil, err
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}
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// callmsg is the message type used for call transations.
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type callmsg struct {
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from *state.StateObject
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to *common.Address
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gas, gasPrice *big.Int
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value *big.Int
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data []byte
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}
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// accessor boilerplate to implement core.Message
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func (m callmsg) From() (common.Address, error) {
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return m.from.Address(), nil
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}
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func (m callmsg) FromFrontier() (common.Address, error) {
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return m.from.Address(), nil
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}
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func (m callmsg) Nonce() uint64 {
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return m.from.Nonce()
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}
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func (m callmsg) To() *common.Address {
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return m.to
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}
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func (m callmsg) GasPrice() *big.Int {
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return m.gasPrice
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}
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func (m callmsg) Gas() *big.Int {
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return m.gas
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}
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func (m callmsg) Value() *big.Int {
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return m.value
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}
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func (m callmsg) Data() []byte {
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return m.data
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}
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// Call forms a transaction from the given arguments and tries to execute it on
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// a private VM with a copy of the state. Any changes are therefore only temporary
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// and not part of the actual state. This allows for local execution/queries.
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func (be *registryAPIBackend) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, string, error) {
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block := be.bc.CurrentBlock()
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statedb, err := state.New(block.Root(), be.chainDb)
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if err != nil {
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return "", "", err
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}
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var from *state.StateObject
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if len(fromStr) == 0 {
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accounts, err := be.am.Accounts()
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if err != nil || len(accounts) == 0 {
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from = statedb.GetOrNewStateObject(common.Address{})
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} else {
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from = statedb.GetOrNewStateObject(accounts[0].Address)
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}
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} else {
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from = statedb.GetOrNewStateObject(common.HexToAddress(fromStr))
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}
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from.SetBalance(common.MaxBig)
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msg := callmsg{
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from: from,
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gas: common.Big(gasStr),
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gasPrice: common.Big(gasPriceStr),
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value: common.Big(valueStr),
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data: common.FromHex(dataStr),
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}
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if len(toStr) > 0 {
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addr := common.HexToAddress(toStr)
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msg.to = &addr
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}
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if msg.gas.Cmp(big.NewInt(0)) == 0 {
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msg.gas = big.NewInt(50000000)
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}
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if msg.gasPrice.Cmp(big.NewInt(0)) == 0 {
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msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
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}
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header := be.bc.CurrentBlock().Header()
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vmenv := core.NewEnv(statedb, be.bc, msg, header)
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gp := new(core.GasPool).AddGas(common.MaxBig)
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res, gas, err := core.ApplyMessage(vmenv, msg, gp)
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return common.ToHex(res), gas.String(), err
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}
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// StorageAt returns the data stores in the state for the given address and location.
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func (be *registryAPIBackend) StorageAt(addr string, storageAddr string) string {
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block := be.bc.CurrentBlock()
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state, err := state.New(block.Root(), be.chainDb)
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if err != nil {
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return ""
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}
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return state.GetState(common.HexToAddress(addr), common.HexToHash(storageAddr)).Hex()
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}
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// Transact forms a transaction from the given arguments and submits it to the
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// transactio pool for execution.
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func (be *registryAPIBackend) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
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if len(toStr) > 0 && toStr != "0x" && !common.IsHexAddress(toStr) {
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return "", errors.New("invalid address")
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}
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var (
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from = common.HexToAddress(fromStr)
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to = common.HexToAddress(toStr)
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value = common.Big(valueStr)
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gas *big.Int
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price *big.Int
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data []byte
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contractCreation bool
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)
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if len(gasStr) == 0 {
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gas = big.NewInt(90000)
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} else {
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gas = common.Big(gasStr)
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}
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if len(gasPriceStr) == 0 {
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price = big.NewInt(10000000000000)
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} else {
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price = common.Big(gasPriceStr)
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}
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data = common.FromHex(codeStr)
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if len(toStr) == 0 {
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contractCreation = true
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}
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nonce := be.txPool.State().GetNonce(from)
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if len(nonceStr) != 0 {
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nonce = common.Big(nonceStr).Uint64()
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}
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var tx *types.Transaction
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if contractCreation {
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tx = types.NewContractCreation(nonce, value, gas, price, data)
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} else {
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tx = types.NewTransaction(nonce, to, value, gas, price, data)
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}
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acc := accounts.Account{from}
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signature, err := be.am.Sign(acc, tx.SigHash().Bytes())
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if err != nil {
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return "", err
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}
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signedTx, err := tx.WithSignature(signature)
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if err != nil {
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return "", err
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}
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be.txPool.SetLocal(signedTx)
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if err := be.txPool.Add(signedTx); err != nil {
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return "", nil
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}
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if contractCreation {
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addr := crypto.CreateAddress(from, nonce)
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glog.V(logger.Info).Infof("Tx(%s) created: %s\n", signedTx.Hash().Hex(), addr.Hex())
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} else {
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glog.V(logger.Info).Infof("Tx(%s) to: %s\n", signedTx.Hash().Hex(), tx.To().Hex())
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}
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return signedTx.Hash().Hex(), nil
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}
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