mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-07-27 07:06:42 +00:00
320 lines
8.5 KiB
Go
320 lines
8.5 KiB
Go
package api
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import (
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"errors"
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"fmt"
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"math/big"
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"regexp"
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"sync"
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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/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/eth"
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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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/*
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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!! THIS IS CURRENTLY A PLACEHOLEDER (HACK) UNTIL PRC v2
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!! https://github.com/ethereum/go-ethereum/pull/1912 is merged
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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*/
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var (
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defaultGasPrice = big.NewInt(10000000000000) //150000000000
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defaultGas = big.NewInt(90000) //500000
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addrReg = regexp.MustCompile(`^(0x)?[a-fA-F0-9]{40}$`)
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)
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type ethApi struct {
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eth *eth.Ethereum
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gpo *eth.GasPriceOracle
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transactionMu sync.RWMutex
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transactMu sync.RWMutex
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state *state.StateDB
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}
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func NewEthApi(ethereum *eth.Ethereum) *ethApi {
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return ðApi{
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eth: ethereum,
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gpo: eth.NewGasPriceOracle(ethereum),
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}
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}
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// subscribes to new head block events and
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// waits until blockchain height is greater n at any time
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// given the current head, waits for the next chain event
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// sets the state to the current head
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// loop is async and quit by closing the channel
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// used in tests and JS console debug module to control advancing private chain manually
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// Note: this is not threadsafe, only called in JS single process and tests
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func (self *ethApi) UpdateState() (wait chan *big.Int) {
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wait = make(chan *big.Int)
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self.state, _ = state.New(self.eth.BlockChain().GetBlockByNumber(0).Root(), self.eth.ChainDb())
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go func() {
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eventSub := self.eth.EventMux().Subscribe(core.ChainHeadEvent{})
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defer eventSub.Unsubscribe()
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var m, n *big.Int
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var ok bool
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eventCh := eventSub.Chan()
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for {
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select {
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case event, ok := <-eventCh:
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if !ok {
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// Event subscription closed, set the channel to nil to stop spinning
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eventCh = nil
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continue
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}
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// A real event arrived, process if new head block assignment
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if event, ok := event.Data.(core.ChainHeadEvent); ok {
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m = event.Block.Number()
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if n != nil && n.Cmp(m) < 0 {
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wait <- n
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n = nil
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}
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statedb, err := state.New(event.Block.Root(), self.eth.ChainDb())
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if err != nil {
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glog.V(logger.Error).Infoln("Could not create new state: %v", err)
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return
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}
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self.state = statedb
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}
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case n, ok = <-wait:
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if !ok {
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return
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}
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}
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}
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}()
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return
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}
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func (self *ethApi) AtStateNum(num int64) registrar.Backend {
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var st *state.StateDB
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var err error
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switch num {
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case -2:
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st = self.eth.Miner().PendingState().Copy()
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default:
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if block := self.getBlockByHeight(num); block != nil {
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st, err = state.New(block.Root(), self.eth.ChainDb())
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if err != nil {
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return nil
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}
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} else {
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st, err = state.New(self.eth.BlockChain().GetBlockByNumber(0).Root(), self.eth.ChainDb())
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if err != nil {
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return nil
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}
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}
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}
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return registrar.Backend(ðApi{
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eth: self.eth,
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state: st,
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})
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}
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func (self *ethApi) GetTxReceipt(txhash common.Hash) *types.Receipt {
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return core.GetReceipt(self.eth.ChainDb(), txhash)
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}
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func (self *ethApi) StorageAt(addr, storageAddr string) string {
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return self.state.GetState(common.HexToAddress(addr), common.HexToHash(storageAddr)).Hex()
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}
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func (self *ethApi) CodeAt(address string) string {
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return common.ToHex(self.state.GetCode(common.HexToAddress(address)))
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}
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func (self *ethApi) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, string, error) {
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statedb := self.state.Copy()
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var from *state.StateObject
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if len(fromStr) == 0 {
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accounts, err := self.eth.AccountManager().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 = self.DefaultGasPrice()
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}
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header := self.CurrentBlock().Header()
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vmenv := core.NewEnv(statedb, self.eth.BlockChain(), 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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func (self *ethApi) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
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if len(toStr) > 0 && toStr != "0x" && !isAddress(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 = DefaultGas()
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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 = self.DefaultGasPrice()
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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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self.transactMu.Lock()
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defer self.transactMu.Unlock()
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var nonce uint64
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if len(nonceStr) != 0 {
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nonce = common.Big(nonceStr).Uint64()
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} else {
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state := self.eth.TxPool().State()
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nonce = state.GetNonce(from)
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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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signed, err := self.sign(tx, from, false)
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if err != nil {
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return "", err
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}
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if err = self.eth.TxPool().Add(signed); err != nil {
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return "", err
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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", signed.Hash().Hex(), addr.Hex())
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} else {
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glog.V(logger.Info).Infof("Tx(%s) to: %s\n", signed.Hash().Hex(), tx.To().Hex())
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}
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return signed.Hash().Hex(), nil
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}
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func (self *ethApi) sign(tx *types.Transaction, from common.Address, didUnlock bool) (*types.Transaction, error) {
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hash := tx.SigHash()
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sig, err := self.doSign(from, hash, didUnlock)
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if err != nil {
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return tx, err
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}
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return tx.WithSignature(sig)
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}
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func (self *ethApi) doSign(from common.Address, hash common.Hash, didUnlock bool) ([]byte, error) {
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sig, err := self.eth.AccountManager().Sign(accounts.Account{Address: from}, hash.Bytes())
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if err == accounts.ErrLocked {
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if didUnlock {
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return nil, fmt.Errorf("signer account still locked after successful unlock")
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}
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// retry signing, the account should now be unlocked.
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return self.doSign(from, hash, true)
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} else if err != nil {
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return nil, err
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}
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return sig, nil
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}
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func DefaultGas() *big.Int { return new(big.Int).Set(defaultGas) }
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func (self *ethApi) DefaultGasPrice() *big.Int {
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return self.gpo.SuggestPrice()
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}
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func (self *ethApi) CurrentBlock() *types.Block {
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return self.eth.BlockChain().CurrentBlock()
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}
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func (self *ethApi) getBlockByHeight(height int64) *types.Block {
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var num uint64
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switch height {
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case -2:
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return self.eth.Miner().PendingBlock()
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case -1:
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return self.CurrentBlock()
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default:
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if height < 0 {
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return nil
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}
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num = uint64(height)
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}
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return self.eth.BlockChain().GetBlockByNumber(num)
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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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func isAddress(addr string) bool {
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return addrReg.MatchString(addr)
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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) { return m.from.Address(), nil }
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func (m callmsg) Nonce() uint64 { return m.from.Nonce() }
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func (m callmsg) To() *common.Address { return m.to }
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func (m callmsg) GasPrice() *big.Int { return m.gasPrice }
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func (m callmsg) Gas() *big.Int { return m.gas }
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func (m callmsg) Value() *big.Int { return m.value }
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func (m callmsg) Data() []byte { return m.data }
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