// Copyright 2015 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package eth
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"math/big"
"os"
"sync"
"time"
"golang.org/x/net/context"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/miner"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
"gopkg.in/fatih/set.v0"
)
const defaultGas = uint64(90000)
// blockByNumber is a commonly used helper function which retrieves and returns
// the block for the given block number, capable of handling two special blocks:
// rpc.LatestBlockNumber and rpc.PendingBlockNumber. It returns nil when no block
// could be found.
func blockByNumber(m *miner.Miner, bc *core.BlockChain, blockNr rpc.BlockNumber) *types.Block {
// Pending block is only known by the miner
if blockNr == rpc.PendingBlockNumber {
block, _ := m.Pending()
return block
}
// Otherwise resolve and return the block
if blockNr == rpc.LatestBlockNumber {
return bc.CurrentBlock()
}
return bc.GetBlockByNumber(uint64(blockNr))
}
// stateAndBlockByNumber is a commonly used helper function which retrieves and
// returns the state and containing block for the given block number, capable of
// handling two special states: rpc.LatestBlockNumber and rpc.PendingBlockNumber.
// It returns nil when no block or state could be found.
func stateAndBlockByNumber(m *miner.Miner, bc *core.BlockChain, blockNr rpc.BlockNumber, chainDb ethdb.Database) (*state.StateDB, *types.Block, error) {
// Pending state is only known by the miner
if blockNr == rpc.PendingBlockNumber {
block, state := m.Pending()
return state, block, nil
}
// Otherwise resolve the block number and return its state
block := blockByNumber(m, bc, blockNr)
if block == nil {
return nil, nil, nil
}
stateDb, err := state.New(block.Root(), chainDb)
return stateDb, block, err
}
// PublicEthereumAPI provides an API to access Ethereum related information.
// It offers only methods that operate on public data that is freely available to anyone.
type PublicEthereumAPI struct {
e *Ethereum
gpo *GasPriceOracle
}
// NewPublicEthereumAPI creates a new Ethereum protocol API.
func NewPublicEthereumAPI(e *Ethereum) *PublicEthereumAPI {
return &PublicEthereumAPI{e, NewGasPriceOracle(e)}
}
// GasPrice returns a suggestion for a gas price.
func (s *PublicEthereumAPI) GasPrice() *big.Int {
return s.gpo.SuggestPrice()
}
// GetCompilers returns the collection of available smart contract compilers
func (s *PublicEthereumAPI) GetCompilers() ([]string, error) {
solc, err := s.e.Solc()
if err != nil {
return nil, err
}
if solc != nil {
return []string{"Solidity"}, nil
}
return []string{}, nil
}
// CompileSolidity compiles the given solidity source
func (s *PublicEthereumAPI) CompileSolidity(source string) (map[string]*compiler.Contract, error) {
solc, err := s.e.Solc()
if err != nil {
return nil, err
}
if solc == nil {
return nil, errors.New("solc (solidity compiler) not found")
}
return solc.Compile(source)
}
// Etherbase is the address that mining rewards will be send to
func (s *PublicEthereumAPI) Etherbase() (common.Address, error) {
return s.e.Etherbase()
}
// see Etherbase
func (s *PublicEthereumAPI) Coinbase() (common.Address, error) {
return s.Etherbase()
}
// ProtocolVersion returns the current Ethereum protocol version this node supports
func (s *PublicEthereumAPI) ProtocolVersion() *rpc.HexNumber {
return rpc.NewHexNumber(s.e.EthVersion())
}
// Hashrate returns the POW hashrate
func (s *PublicEthereumAPI) Hashrate() *rpc.HexNumber {
return rpc.NewHexNumber(s.e.Miner().HashRate())
}
// Syncing returns false in case the node is currently not syncing with the network. It can be up to date or has not
// yet received the latest block headers from its pears. In case it is synchronizing:
// - startingBlock: block number this node started to synchronise from
// - currentBlock: block number this node is currently importing
// - highestBlock: block number of the highest block header this node has received from peers
// - pulledStates: number of state entries processed until now
// - knownStates: number of known state entries that still need to be pulled
func (s *PublicEthereumAPI) Syncing() (interface{}, error) {
origin, current, height, pulled, known := s.e.Downloader().Progress()
// Return not syncing if the synchronisation already completed
if current >= height {
return false, nil
}
// Otherwise gather the block sync stats
return map[string]interface{}{
"startingBlock": rpc.NewHexNumber(origin),
"currentBlock": rpc.NewHexNumber(current),
"highestBlock": rpc.NewHexNumber(height),
"pulledStates": rpc.NewHexNumber(pulled),
"knownStates": rpc.NewHexNumber(known),
}, nil
}
// PublicMinerAPI provides an API to control the miner.
// It offers only methods that operate on data that pose no security risk when it is publicly accessible.
type PublicMinerAPI struct {
e *Ethereum
agent *miner.RemoteAgent
}
// NewPublicMinerAPI create a new PublicMinerAPI instance.
func NewPublicMinerAPI(e *Ethereum) *PublicMinerAPI {
agent := miner.NewRemoteAgent()
e.Miner().Register(agent)
return &PublicMinerAPI{e, agent}
}
// Mining returns an indication if this node is currently mining.
func (s *PublicMinerAPI) Mining() bool {
return s.e.IsMining()
}
// SubmitWork can be used by external miner to submit their POW solution. It returns an indication if the work was
// accepted. Note, this is not an indication if the provided work was valid!
func (s *PublicMinerAPI) SubmitWork(nonce rpc.HexNumber, solution, digest common.Hash) bool {
return s.agent.SubmitWork(nonce.Uint64(), digest, solution)
}
// GetWork returns a work package for external miner. The work package consists of 3 strings
// result[0], 32 bytes hex encoded current block header pow-hash
// result[1], 32 bytes hex encoded seed hash used for DAG
// result[2], 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
func (s *PublicMinerAPI) GetWork() ([]string, error) {
if !s.e.IsMining() {
if err := s.e.StartMining(0, ""); err != nil {
return nil, err
}
}
if work, err := s.agent.GetWork(); err == nil {
return work[:], nil
} else {
glog.Infof("%v\n", err)
}
return nil, fmt.Errorf("mining not ready")
}
// SubmitHashrate can be used for remote miners to submit their hash rate. This enables the node to report the combined
// hash rate of all miners which submit work through this node. It accepts the miner hash rate and an identifier which
// must be unique between nodes.
func (s *PublicMinerAPI) SubmitHashrate(hashrate rpc.HexNumber, id common.Hash) bool {
s.agent.SubmitHashrate(id, hashrate.Uint64())
return true
}
// PrivateMinerAPI provides private RPC methods to control the miner.
// These methods can be abused by external users and must be considered insecure for use by untrusted users.
type PrivateMinerAPI struct {
e *Ethereum
}
// NewPrivateMinerAPI create a new RPC service which controls the miner of this node.
func NewPrivateMinerAPI(e *Ethereum) *PrivateMinerAPI {
return &PrivateMinerAPI{e: e}
}
// Start the miner with the given number of threads
func (s *PrivateMinerAPI) Start(threads rpc.HexNumber) (bool, error) {
s.e.StartAutoDAG()
err := s.e.StartMining(threads.Int(), "")
if err == nil {
return true, nil
}
return false, err
}
// Stop the miner
func (s *PrivateMinerAPI) Stop() bool {
s.e.StopMining()
return true
}
// SetExtra sets the extra data string that is included when this miner mines a block.
func (s *PrivateMinerAPI) SetExtra(extra string) (bool, error) {
if err := s.e.Miner().SetExtra([]byte(extra)); err != nil {
return false, err
}
return true, nil
}
// SetGasPrice sets the minimum accepted gas price for the miner.
func (s *PrivateMinerAPI) SetGasPrice(gasPrice rpc.Number) bool {
s.e.Miner().SetGasPrice(gasPrice.BigInt())
return true
}
// SetEtherbase sets the etherbase of the miner
func (s *PrivateMinerAPI) SetEtherbase(etherbase common.Address) bool {
s.e.SetEtherbase(etherbase)
return true
}
// StartAutoDAG starts auto DAG generation. This will prevent the DAG generating on epoch change
// which will cause the node to stop mining during the generation process.
func (s *PrivateMinerAPI) StartAutoDAG() bool {
s.e.StartAutoDAG()
return true
}
// StopAutoDAG stops auto DAG generation
func (s *PrivateMinerAPI) StopAutoDAG() bool {
s.e.StopAutoDAG()
return true
}
// MakeDAG creates the new DAG for the given block number
func (s *PrivateMinerAPI) MakeDAG(blockNr rpc.BlockNumber) (bool, error) {
if err := ethash.MakeDAG(uint64(blockNr.Int64()), ""); err != nil {
return false, err
}
return true, nil
}
// PublicTxPoolAPI offers and API for the transaction pool. It only operates on data that is non confidential.
type PublicTxPoolAPI struct {
e *Ethereum
}
// NewPublicTxPoolAPI creates a new tx pool service that gives information about the transaction pool.
func NewPublicTxPoolAPI(e *Ethereum) *PublicTxPoolAPI {
return &PublicTxPoolAPI{e}
}
// Content returns the transactions contained within the transaction pool.
func (s *PublicTxPoolAPI) Content() map[string]map[string]map[string][]*RPCTransaction {
content := map[string]map[string]map[string][]*RPCTransaction{
"pending": make(map[string]map[string][]*RPCTransaction),
"queued": make(map[string]map[string][]*RPCTransaction),
}
pending, queue := s.e.TxPool().Content()
// Flatten the pending transactions
for account, batches := range pending {
dump := make(map[string][]*RPCTransaction)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], newRPCPendingTransaction(tx))
}
}
content["pending"][account.Hex()] = dump
}
// Flatten the queued transactions
for account, batches := range queue {
dump := make(map[string][]*RPCTransaction)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], newRPCPendingTransaction(tx))
}
}
content["queued"][account.Hex()] = dump
}
return content
}
// Status returns the number of pending and queued transaction in the pool.
func (s *PublicTxPoolAPI) Status() map[string]*rpc.HexNumber {
pending, queue := s.e.TxPool().Stats()
return map[string]*rpc.HexNumber{
"pending": rpc.NewHexNumber(pending),
"queued": rpc.NewHexNumber(queue),
}
}
// Inspect retrieves the content of the transaction pool and flattens it into an
// easily inspectable list.
func (s *PublicTxPoolAPI) Inspect() map[string]map[string]map[string][]string {
content := map[string]map[string]map[string][]string{
"pending": make(map[string]map[string][]string),
"queued": make(map[string]map[string][]string),
}
pending, queue := s.e.TxPool().Content()
// Define a formatter to flatten a transaction into a string
var format = func(tx *types.Transaction) string {
if to := tx.To(); to != nil {
return fmt.Sprintf("%s: %v wei + %v × %v gas", tx.To().Hex(), tx.Value(), tx.Gas(), tx.GasPrice())
}
return fmt.Sprintf("contract creation: %v wei + %v × %v gas", tx.Value(), tx.Gas(), tx.GasPrice())
}
// Flatten the pending transactions
for account, batches := range pending {
dump := make(map[string][]string)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], format(tx))
}
}
content["pending"][account.Hex()] = dump
}
// Flatten the queued transactions
for account, batches := range queue {
dump := make(map[string][]string)
for nonce, txs := range batches {
nonce := fmt.Sprintf("%d", nonce)
for _, tx := range txs {
dump[nonce] = append(dump[nonce], format(tx))
}
}
content["queued"][account.Hex()] = dump
}
return content
}
// PublicAccountAPI provides an API to access accounts managed by this node.
// It offers only methods that can retrieve accounts.
type PublicAccountAPI struct {
am *accounts.Manager
}
// NewPublicAccountAPI creates a new PublicAccountAPI.
func NewPublicAccountAPI(am *accounts.Manager) *PublicAccountAPI {
return &PublicAccountAPI{am: am}
}
// Accounts returns the collection of accounts this node manages
func (s *PublicAccountAPI) Accounts() ([]accounts.Account, error) {
return s.am.Accounts()
}
// PrivateAccountAPI provides an API to access accounts managed by this node.
// It offers methods to create, (un)lock en list accounts.
type PrivateAccountAPI struct {
am *accounts.Manager
}
// NewPrivateAccountAPI create a new PrivateAccountAPI.
func NewPrivateAccountAPI(am *accounts.Manager) *PrivateAccountAPI {
return &PrivateAccountAPI{am}
}
// ListAccounts will return a list of addresses for accounts this node manages.
func (s *PrivateAccountAPI) ListAccounts() ([]common.Address, error) {
accounts, err := s.am.Accounts()
if err != nil {
return nil, err
}
addresses := make([]common.Address, len(accounts))
for i, acc := range accounts {
addresses[i] = acc.Address
}
return addresses, nil
}
// NewAccount will create a new account and returns the address for the new account.
func (s *PrivateAccountAPI) NewAccount(password string) (common.Address, error) {
acc, err := s.am.NewAccount(password)
if err == nil {
return acc.Address, nil
}
return common.Address{}, err
}
// UnlockAccount will unlock the account associated with the given address with the given password for duration seconds.
// It returns an indication if the action was successful.
func (s *PrivateAccountAPI) UnlockAccount(addr common.Address, password string, duration int) bool {
if err := s.am.TimedUnlock(addr, password, time.Duration(duration)*time.Second); err != nil {
glog.V(logger.Info).Infof("%v\n", err)
return false
}
return true
}
// LockAccount will lock the account associated with the given address when it's unlocked.
func (s *PrivateAccountAPI) LockAccount(addr common.Address) bool {
return s.am.Lock(addr) == nil
}
// PublicBlockChainAPI provides an API to access the Ethereum blockchain.
// It offers only methods that operate on public data that is freely available to anyone.
type PublicBlockChainAPI struct {
config *core.ChainConfig
bc *core.BlockChain
chainDb ethdb.Database
eventMux *event.TypeMux
muNewBlockSubscriptions sync.Mutex // protects newBlocksSubscriptions
newBlockSubscriptions map[string]func(core.ChainEvent) error // callbacks for new block subscriptions
am *accounts.Manager
miner *miner.Miner
}
// NewPublicBlockChainAPI creates a new Etheruem blockchain API.
func NewPublicBlockChainAPI(config *core.ChainConfig, bc *core.BlockChain, m *miner.Miner, chainDb ethdb.Database, eventMux *event.TypeMux, am *accounts.Manager) *PublicBlockChainAPI {
api := &PublicBlockChainAPI{
config: config,
bc: bc,
miner: m,
chainDb: chainDb,
eventMux: eventMux,
am: am,
newBlockSubscriptions: make(map[string]func(core.ChainEvent) error),
}
go api.subscriptionLoop()
return api
}
// subscriptionLoop reads events from the global event mux and creates notifications for the matched subscriptions.
func (s *PublicBlockChainAPI) subscriptionLoop() {
sub := s.eventMux.Subscribe(core.ChainEvent{})
for event := range sub.Chan() {
if chainEvent, ok := event.Data.(core.ChainEvent); ok {
s.muNewBlockSubscriptions.Lock()
for id, notifyOf := range s.newBlockSubscriptions {
if notifyOf(chainEvent) == rpc.ErrNotificationNotFound {
delete(s.newBlockSubscriptions, id)
}
}
s.muNewBlockSubscriptions.Unlock()
}
}
}
// BlockNumber returns the block number of the chain head.
func (s *PublicBlockChainAPI) BlockNumber() *big.Int {
return s.bc.CurrentHeader().Number
}
// GetBalance returns the amount of wei for the given address in the state of the
// given block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta
// block numbers are also allowed.
func (s *PublicBlockChainAPI) GetBalance(address common.Address, blockNr rpc.BlockNumber) (*big.Int, error) {
state, _, err := stateAndBlockByNumber(s.miner, s.bc, blockNr, s.chainDb)
if state == nil || err != nil {
return nil, err
}
return state.GetBalance(address), nil
}
// GetBlockByNumber returns the requested block. When blockNr is -1 the chain head is returned. When fullTx is true all
// transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetBlockByNumber(blockNr rpc.BlockNumber, fullTx bool) (map[string]interface{}, error) {
if block := blockByNumber(s.miner, s.bc, blockNr); block != nil {
response, err := s.rpcOutputBlock(block, true, fullTx)
if err == nil && blockNr == rpc.PendingBlockNumber {
// Pending blocks need to nil out a few fields
for _, field := range []string{"hash", "nonce", "logsBloom", "miner"} {
response[field] = nil
}
}
return response, err
}
return nil, nil
}
// GetBlockByHash returns the requested block. When fullTx is true all transactions in the block are returned in full
// detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetBlockByHash(blockHash common.Hash, fullTx bool) (map[string]interface{}, error) {
if block := s.bc.GetBlock(blockHash); block != nil {
return s.rpcOutputBlock(block, true, fullTx)
}
return nil, nil
}
// GetUncleByBlockNumberAndIndex returns the uncle block for the given block hash and index. When fullTx is true
// all transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetUncleByBlockNumberAndIndex(blockNr rpc.BlockNumber, index rpc.HexNumber) (map[string]interface{}, error) {
if block := blockByNumber(s.miner, s.bc, blockNr); block != nil {
uncles := block.Uncles()
if index.Int() < 0 || index.Int() >= len(uncles) {
glog.V(logger.Debug).Infof("uncle block on index %d not found for block #%d", index.Int(), blockNr)
return nil, nil
}
block = types.NewBlockWithHeader(uncles[index.Int()])
return s.rpcOutputBlock(block, false, false)
}
return nil, nil
}
// GetUncleByBlockHashAndIndex returns the uncle block for the given block hash and index. When fullTx is true
// all transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (s *PublicBlockChainAPI) GetUncleByBlockHashAndIndex(blockHash common.Hash, index rpc.HexNumber) (map[string]interface{}, error) {
if block := s.bc.GetBlock(blockHash); block != nil {
uncles := block.Uncles()
if index.Int() < 0 || index.Int() >= len(uncles) {
glog.V(logger.Debug).Infof("uncle block on index %d not found for block %s", index.Int(), blockHash.Hex())
return nil, nil
}
block = types.NewBlockWithHeader(uncles[index.Int()])
return s.rpcOutputBlock(block, false, false)
}
return nil, nil
}
// GetUncleCountByBlockNumber returns number of uncles in the block for the given block number
func (s *PublicBlockChainAPI) GetUncleCountByBlockNumber(blockNr rpc.BlockNumber) *rpc.HexNumber {
if block := blockByNumber(s.miner, s.bc, blockNr); block != nil {
return rpc.NewHexNumber(len(block.Uncles()))
}
return nil
}
// GetUncleCountByBlockHash returns number of uncles in the block for the given block hash
func (s *PublicBlockChainAPI) GetUncleCountByBlockHash(blockHash common.Hash) *rpc.HexNumber {
if block := s.bc.GetBlock(blockHash); block != nil {
return rpc.NewHexNumber(len(block.Uncles()))
}
return nil
}
// NewBlocksArgs allows the user to specify if the returned block should include transactions and in which format.
type NewBlocksArgs struct {
IncludeTransactions bool `json:"includeTransactions"`
TransactionDetails bool `json:"transactionDetails"`
}
// NewBlocks triggers a new block event each time a block is appended to the chain. It accepts an argument which allows
// the caller to specify whether the output should contain transactions and in what format.
func (s *PublicBlockChainAPI) NewBlocks(ctx context.Context, args NewBlocksArgs) (rpc.Subscription, error) {
notifier, supported := ctx.Value(rpc.NotifierContextKey).(rpc.Notifier)
if !supported {
return nil, rpc.ErrNotificationsUnsupported
}
// create a subscription that will remove itself when unsubscribed/cancelled
subscription, err := notifier.NewSubscription(func(subId string) {
s.muNewBlockSubscriptions.Lock()
delete(s.newBlockSubscriptions, subId)
s.muNewBlockSubscriptions.Unlock()
})
if err != nil {
return nil, err
}
// add a callback that is called on chain events which will format the block and notify the client
s.muNewBlockSubscriptions.Lock()
s.newBlockSubscriptions[subscription.ID()] = func(e core.ChainEvent) error {
if notification, err := s.rpcOutputBlock(e.Block, args.IncludeTransactions, args.TransactionDetails); err == nil {
return subscription.Notify(notification)
} else {
glog.V(logger.Warn).Info("unable to format block %v\n", err)
}
return nil
}
s.muNewBlockSubscriptions.Unlock()
return subscription, nil
}
// GetCode returns the code stored at the given address in the state for the given block number.
func (s *PublicBlockChainAPI) GetCode(address common.Address, blockNr rpc.BlockNumber) (string, error) {
state, _, err := stateAndBlockByNumber(s.miner, s.bc, blockNr, s.chainDb)
if state == nil || err != nil {
return "", err
}
res := state.GetCode(address)
if len(res) == 0 { // backwards compatibility
return "0x", nil
}
return common.ToHex(res), nil
}
// GetStorageAt returns the storage from the state at the given address, key and
// block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta block
// numbers are also allowed.
func (s *PublicBlockChainAPI) GetStorageAt(address common.Address, key string, blockNr rpc.BlockNumber) (string, error) {
state, _, err := stateAndBlockByNumber(s.miner, s.bc, blockNr, s.chainDb)
if state == nil || err != nil {
return "0x", err
}
return state.GetState(address, common.HexToHash(key)).Hex(), nil
}
// callmsg is the message type used for call transactions.
type callmsg struct {
from *state.StateObject
to *common.Address
gas, gasPrice *big.Int
value *big.Int
data []byte
}
// accessor boilerplate to implement core.Message
func (m callmsg) From() (common.Address, error) { return m.from.Address(), nil }
func (m callmsg) FromFrontier() (common.Address, error) { return m.from.Address(), nil }
func (m callmsg) Nonce() uint64 { return m.from.Nonce() }
func (m callmsg) To() *common.Address { return m.to }
func (m callmsg) GasPrice() *big.Int { return m.gasPrice }
func (m callmsg) Gas() *big.Int { return m.gas }
func (m callmsg) Value() *big.Int { return m.value }
func (m callmsg) Data() []byte { return m.data }
type CallArgs struct {
From common.Address `json:"from"`
To *common.Address `json:"to"`
Gas rpc.HexNumber `json:"gas"`
GasPrice rpc.HexNumber `json:"gasPrice"`
Value rpc.HexNumber `json:"value"`
Data string `json:"data"`
}
func (s *PublicBlockChainAPI) doCall(args CallArgs, blockNr rpc.BlockNumber) (string, *big.Int, error) {
// Fetch the state associated with the block number
stateDb, block, err := stateAndBlockByNumber(s.miner, s.bc, blockNr, s.chainDb)
if stateDb == nil || err != nil {
return "0x", nil, err
}
stateDb = stateDb.Copy()
// Retrieve the account state object to interact with
var from *state.StateObject
if args.From == (common.Address{}) {
accounts, err := s.am.Accounts()
if err != nil || len(accounts) == 0 {
from = stateDb.GetOrNewStateObject(common.Address{})
} else {
from = stateDb.GetOrNewStateObject(accounts[0].Address)
}
} else {
from = stateDb.GetOrNewStateObject(args.From)
}
from.SetBalance(common.MaxBig)
// Assemble the CALL invocation
msg := callmsg{
from: from,
to: args.To,
gas: args.Gas.BigInt(),
gasPrice: args.GasPrice.BigInt(),
value: args.Value.BigInt(),
data: common.FromHex(args.Data),
}
if msg.gas.Cmp(common.Big0) == 0 {
msg.gas = big.NewInt(50000000)
}
if msg.gasPrice.Cmp(common.Big0) == 0 {
msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
}
// Execute the call and return
vmenv := core.NewEnv(stateDb, s.config, s.bc, msg, block.Header(), s.config.VmConfig)
gp := new(core.GasPool).AddGas(common.MaxBig)
res, requiredGas, _, err := core.NewStateTransition(vmenv, msg, gp).TransitionDb()
if len(res) == 0 { // backwards compatibility
return "0x", requiredGas, err
}
return common.ToHex(res), requiredGas, err
}
// Call executes the given transaction on the state for the given block number.
// It doesn't make and changes in the state/blockchain and is useful to execute and retrieve values.
func (s *PublicBlockChainAPI) Call(args CallArgs, blockNr rpc.BlockNumber) (string, error) {
result, _, err := s.doCall(args, blockNr)
return result, err
}
// EstimateGas returns an estimate of the amount of gas needed to execute the given transaction.
func (s *PublicBlockChainAPI) EstimateGas(args CallArgs) (*rpc.HexNumber, error) {
_, gas, err := s.doCall(args, rpc.PendingBlockNumber)
return rpc.NewHexNumber(gas), err
}
// rpcOutputBlock converts the given block to the RPC output which depends on fullTx. If inclTx is true transactions are
// returned. When fullTx is true the returned block contains full transaction details, otherwise it will only contain
// transaction hashes.
func (s *PublicBlockChainAPI) rpcOutputBlock(b *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {
fields := map[string]interface{}{
"number": rpc.NewHexNumber(b.Number()),
"hash": b.Hash(),
"parentHash": b.ParentHash(),
"nonce": b.Header().Nonce,
"sha3Uncles": b.UncleHash(),
"logsBloom": b.Bloom(),
"stateRoot": b.Root(),
"miner": b.Coinbase(),
"difficulty": rpc.NewHexNumber(b.Difficulty()),
"totalDifficulty": rpc.NewHexNumber(s.bc.GetTd(b.Hash())),
"extraData": fmt.Sprintf("0x%x", b.Extra()),
"size": rpc.NewHexNumber(b.Size().Int64()),
"gasLimit": rpc.NewHexNumber(b.GasLimit()),
"gasUsed": rpc.NewHexNumber(b.GasUsed()),
"timestamp": rpc.NewHexNumber(b.Time()),
"transactionsRoot": b.TxHash(),
"receiptRoot": b.ReceiptHash(),
}
if inclTx {
formatTx := func(tx *types.Transaction) (interface{}, error) {
return tx.Hash(), nil
}
if fullTx {
formatTx = func(tx *types.Transaction) (interface{}, error) {
return newRPCTransaction(b, tx.Hash())
}
}
txs := b.Transactions()
transactions := make([]interface{}, len(txs))
var err error
for i, tx := range b.Transactions() {
if transactions[i], err = formatTx(tx); err != nil {
return nil, err
}
}
fields["transactions"] = transactions
}
uncles := b.Uncles()
uncleHashes := make([]common.Hash, len(uncles))
for i, uncle := range uncles {
uncleHashes[i] = uncle.Hash()
}
fields["uncles"] = uncleHashes
return fields, nil
}
// RPCTransaction represents a transaction that will serialize to the RPC representation of a transaction
type RPCTransaction struct {
BlockHash common.Hash `json:"blockHash"`
BlockNumber *rpc.HexNumber `json:"blockNumber"`
From common.Address `json:"from"`
Gas *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Hash common.Hash `json:"hash"`
Input string `json:"input"`
Nonce *rpc.HexNumber `json:"nonce"`
To *common.Address `json:"to"`
TransactionIndex *rpc.HexNumber `json:"transactionIndex"`
Value *rpc.HexNumber `json:"value"`
}
// newRPCPendingTransaction returns a pending transaction that will serialize to the RPC representation
func newRPCPendingTransaction(tx *types.Transaction) *RPCTransaction {
from, _ := tx.FromFrontier()
return &RPCTransaction{
From: from,
Gas: rpc.NewHexNumber(tx.Gas()),
GasPrice: rpc.NewHexNumber(tx.GasPrice()),
Hash: tx.Hash(),
Input: fmt.Sprintf("0x%x", tx.Data()),
Nonce: rpc.NewHexNumber(tx.Nonce()),
To: tx.To(),
Value: rpc.NewHexNumber(tx.Value()),
}
}
// newRPCTransaction returns a transaction that will serialize to the RPC representation.
func newRPCTransactionFromBlockIndex(b *types.Block, txIndex int) (*RPCTransaction, error) {
if txIndex >= 0 && txIndex < len(b.Transactions()) {
tx := b.Transactions()[txIndex]
from, err := tx.FromFrontier()
if err != nil {
return nil, err
}
return &RPCTransaction{
BlockHash: b.Hash(),
BlockNumber: rpc.NewHexNumber(b.Number()),
From: from,
Gas: rpc.NewHexNumber(tx.Gas()),
GasPrice: rpc.NewHexNumber(tx.GasPrice()),
Hash: tx.Hash(),
Input: fmt.Sprintf("0x%x", tx.Data()),
Nonce: rpc.NewHexNumber(tx.Nonce()),
To: tx.To(),
TransactionIndex: rpc.NewHexNumber(txIndex),
Value: rpc.NewHexNumber(tx.Value()),
}, nil
}
return nil, nil
}
// newRPCTransaction returns a transaction that will serialize to the RPC representation.
func newRPCTransaction(b *types.Block, txHash common.Hash) (*RPCTransaction, error) {
for idx, tx := range b.Transactions() {
if tx.Hash() == txHash {
return newRPCTransactionFromBlockIndex(b, idx)
}
}
return nil, nil
}
// PublicTransactionPoolAPI exposes methods for the RPC interface
type PublicTransactionPoolAPI struct {
eventMux *event.TypeMux
chainDb ethdb.Database
gpo *GasPriceOracle
bc *core.BlockChain
miner *miner.Miner
am *accounts.Manager
txPool *core.TxPool
txMu sync.Mutex
muPendingTxSubs sync.Mutex
pendingTxSubs map[string]rpc.Subscription
}
// NewPublicTransactionPoolAPI creates a new RPC service with methods specific for the transaction pool.
func NewPublicTransactionPoolAPI(e *Ethereum) *PublicTransactionPoolAPI {
api := &PublicTransactionPoolAPI{
eventMux: e.EventMux(),
gpo: NewGasPriceOracle(e),
chainDb: e.ChainDb(),
bc: e.BlockChain(),
am: e.AccountManager(),
txPool: e.TxPool(),
miner: e.Miner(),
pendingTxSubs: make(map[string]rpc.Subscription),
}
go api.subscriptionLoop()
return api
}
// subscriptionLoop listens for events on the global event mux and creates notifications for subscriptions.
func (s *PublicTransactionPoolAPI) subscriptionLoop() {
sub := s.eventMux.Subscribe(core.TxPreEvent{})
accountTimeout := time.NewTicker(10 * time.Second)
// only publish pending tx signed by one of the accounts in the node
accountSet := set.New()
accounts, _ := s.am.Accounts()
for _, acc := range accounts {
accountSet.Add(acc.Address)
}
for {
select {
case event := <-sub.Chan():
if event == nil {
continue
}
tx := event.Data.(core.TxPreEvent)
if from, err := tx.Tx.FromFrontier(); err == nil {
if accountSet.Has(from) {
s.muPendingTxSubs.Lock()
for id, sub := range s.pendingTxSubs {
if sub.Notify(tx.Tx.Hash()) == rpc.ErrNotificationNotFound {
delete(s.pendingTxSubs, id)
}
}
s.muPendingTxSubs.Unlock()
}
}
case <-accountTimeout.C:
// refresh account list when accounts are added/removed from the node.
if accounts, err := s.am.Accounts(); err == nil {
accountSet.Clear()
for _, acc := range accounts {
accountSet.Add(acc.Address)
}
}
}
}
}
func getTransaction(chainDb ethdb.Database, txPool *core.TxPool, txHash common.Hash) (*types.Transaction, bool, error) {
txData, err := chainDb.Get(txHash.Bytes())
isPending := false
tx := new(types.Transaction)
if err == nil && len(txData) > 0 {
if err := rlp.DecodeBytes(txData, tx); err != nil {
return nil, isPending, err
}
} else {
// pending transaction?
tx = txPool.GetTransaction(txHash)
isPending = true
}
return tx, isPending, nil
}
// GetBlockTransactionCountByNumber returns the number of transactions in the block with the given block number.
func (s *PublicTransactionPoolAPI) GetBlockTransactionCountByNumber(blockNr rpc.BlockNumber) *rpc.HexNumber {
if block := blockByNumber(s.miner, s.bc, blockNr); block != nil {
return rpc.NewHexNumber(len(block.Transactions()))
}
return nil
}
// GetBlockTransactionCountByHash returns the number of transactions in the block with the given hash.
func (s *PublicTransactionPoolAPI) GetBlockTransactionCountByHash(blockHash common.Hash) *rpc.HexNumber {
if block := s.bc.GetBlock(blockHash); block != nil {
return rpc.NewHexNumber(len(block.Transactions()))
}
return nil
}
// GetTransactionByBlockNumberAndIndex returns the transaction for the given block number and index.
func (s *PublicTransactionPoolAPI) GetTransactionByBlockNumberAndIndex(blockNr rpc.BlockNumber, index rpc.HexNumber) (*RPCTransaction, error) {
if block := blockByNumber(s.miner, s.bc, blockNr); block != nil {
return newRPCTransactionFromBlockIndex(block, index.Int())
}
return nil, nil
}
// GetTransactionByBlockHashAndIndex returns the transaction for the given block hash and index.
func (s *PublicTransactionPoolAPI) GetTransactionByBlockHashAndIndex(blockHash common.Hash, index rpc.HexNumber) (*RPCTransaction, error) {
if block := s.bc.GetBlock(blockHash); block != nil {
return newRPCTransactionFromBlockIndex(block, index.Int())
}
return nil, nil
}
// GetTransactionCount returns the number of transactions the given address has sent for the given block number
func (s *PublicTransactionPoolAPI) GetTransactionCount(address common.Address, blockNr rpc.BlockNumber) (*rpc.HexNumber, error) {
state, _, err := stateAndBlockByNumber(s.miner, s.bc, blockNr, s.chainDb)
if state == nil || err != nil {
return nil, err
}
return rpc.NewHexNumber(state.GetNonce(address)), nil
}
// getTransactionBlockData fetches the meta data for the given transaction from the chain database. This is useful to
// retrieve block information for a hash. It returns the block hash, block index and transaction index.
func getTransactionBlockData(chainDb ethdb.Database, txHash common.Hash) (common.Hash, uint64, uint64, error) {
var txBlock struct {
BlockHash common.Hash
BlockIndex uint64
Index uint64
}
blockData, err := chainDb.Get(append(txHash.Bytes(), 0x0001))
if err != nil {
return common.Hash{}, uint64(0), uint64(0), err
}
reader := bytes.NewReader(blockData)
if err = rlp.Decode(reader, &txBlock); err != nil {
return common.Hash{}, uint64(0), uint64(0), err
}
return txBlock.BlockHash, txBlock.BlockIndex, txBlock.Index, nil
}
// GetTransactionByHash returns the transaction for the given hash
func (s *PublicTransactionPoolAPI) GetTransactionByHash(txHash common.Hash) (*RPCTransaction, error) {
var tx *types.Transaction
var isPending bool
var err error
if tx, isPending, err = getTransaction(s.chainDb, s.txPool, txHash); err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
} else if tx == nil {
return nil, nil
}
if isPending {
return newRPCPendingTransaction(tx), nil
}
blockHash, _, _, err := getTransactionBlockData(s.chainDb, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
if block := s.bc.GetBlock(blockHash); block != nil {
return newRPCTransaction(block, txHash)
}
return nil, nil
}
// GetTransactionReceipt returns the transaction receipt for the given transaction hash.
func (s *PublicTransactionPoolAPI) GetTransactionReceipt(txHash common.Hash) (map[string]interface{}, error) {
receipt := core.GetReceipt(s.chainDb, txHash)
if receipt == nil {
glog.V(logger.Debug).Infof("receipt not found for transaction %s", txHash.Hex())
return nil, nil
}
tx, _, err := getTransaction(s.chainDb, s.txPool, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
txBlock, blockIndex, index, err := getTransactionBlockData(s.chainDb, txHash)
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
from, err := tx.FromFrontier()
if err != nil {
glog.V(logger.Debug).Infof("%v\n", err)
return nil, nil
}
fields := map[string]interface{}{
"root": common.Bytes2Hex(receipt.PostState),
"blockHash": txBlock,
"blockNumber": rpc.NewHexNumber(blockIndex),
"transactionHash": txHash,
"transactionIndex": rpc.NewHexNumber(index),
"from": from,
"to": tx.To(),
"gasUsed": rpc.NewHexNumber(receipt.GasUsed),
"cumulativeGasUsed": rpc.NewHexNumber(receipt.CumulativeGasUsed),
"contractAddress": nil,
"logs": receipt.Logs,
}
if receipt.Logs == nil {
fields["logs"] = []vm.Logs{}
}
// If the ContractAddress is 20 0x0 bytes, assume it is not a contract creation
if bytes.Compare(receipt.ContractAddress.Bytes(), bytes.Repeat([]byte{0}, 20)) != 0 {
fields["contractAddress"] = receipt.ContractAddress
}
return fields, nil
}
// sign is a helper function that signs a transaction with the private key of the given address.
func (s *PublicTransactionPoolAPI) sign(address common.Address, tx *types.Transaction) (*types.Transaction, error) {
acc := accounts.Account{address}
signature, err := s.am.Sign(acc, tx.SigHash().Bytes())
if err != nil {
return nil, err
}
return tx.WithSignature(signature)
}
type SendTxArgs struct {
From common.Address `json:"from"`
To *common.Address `json:"to"`
Gas *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
Nonce *rpc.HexNumber `json:"nonce"`
}
// 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(s.gpo.SuggestPrice())
}
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 == nil)
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{}, err
}
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
}
// 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.FromFrontier()
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
}
// Sign signs the given hash using the key that matches the address. The key must be unlocked in order to sign the
// hash.
func (s *PublicTransactionPoolAPI) Sign(address common.Address, hash common.Hash) (string, error) {
signature, error := s.am.Sign(accounts.Account{Address: address}, hash[:])
return common.ToHex(signature), error
}
type SignTransactionArgs struct {
From common.Address
To *common.Address
Nonce *rpc.HexNumber
Value *rpc.HexNumber
Gas *rpc.HexNumber
GasPrice *rpc.HexNumber
Data string
BlockNumber int64
}
// Tx is a helper object for argument and return values
type Tx struct {
tx *types.Transaction
To *common.Address `json:"to"`
From common.Address `json:"from"`
Nonce *rpc.HexNumber `json:"nonce"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
GasLimit *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Hash common.Hash `json:"hash"`
}
func (tx *Tx) UnmarshalJSON(b []byte) (err error) {
req := struct {
To *common.Address `json:"to"`
From common.Address `json:"from"`
Nonce *rpc.HexNumber `json:"nonce"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
GasLimit *rpc.HexNumber `json:"gas"`
GasPrice *rpc.HexNumber `json:"gasPrice"`
Hash common.Hash `json:"hash"`
}{}
if err := json.Unmarshal(b, &req); err != nil {
return err
}
tx.To = req.To
tx.From = req.From
tx.Nonce = req.Nonce
tx.Value = req.Value
tx.Data = req.Data
tx.GasLimit = req.GasLimit
tx.GasPrice = req.GasPrice
tx.Hash = req.Hash
data := common.Hex2Bytes(tx.Data)
if tx.Nonce == nil {
return fmt.Errorf("need nonce")
}
if tx.Value == nil {
tx.Value = rpc.NewHexNumber(0)
}
if tx.GasLimit == nil {
tx.GasLimit = rpc.NewHexNumber(0)
}
if tx.GasPrice == nil {
tx.GasPrice = rpc.NewHexNumber(int64(50000000000))
}
contractCreation := (req.To == nil)
if contractCreation {
tx.tx = types.NewContractCreation(tx.Nonce.Uint64(), tx.Value.BigInt(), tx.GasLimit.BigInt(), tx.GasPrice.BigInt(), data)
} else {
tx.tx = types.NewTransaction(tx.Nonce.Uint64(), *tx.To, tx.Value.BigInt(), tx.GasLimit.BigInt(), tx.GasPrice.BigInt(), data)
}
return nil
}
type SignTransactionResult struct {
Raw string `json:"raw"`
Tx *Tx `json:"tx"`
}
func newTx(t *types.Transaction) *Tx {
from, _ := t.FromFrontier()
return &Tx{
tx: t,
To: t.To(),
From: from,
Value: rpc.NewHexNumber(t.Value()),
Nonce: rpc.NewHexNumber(t.Nonce()),
Data: "0x" + common.Bytes2Hex(t.Data()),
GasLimit: rpc.NewHexNumber(t.Gas()),
GasPrice: rpc.NewHexNumber(t.GasPrice()),
Hash: t.Hash(),
}
}
// SignTransaction will sign the given transaction with the from account.
// The node needs to have the private key of the account corresponding with
// the given from address and it needs to be unlocked.
func (s *PublicTransactionPoolAPI) SignTransaction(args *SignTransactionArgs) (*SignTransactionResult, error) {
if args.Gas == nil {
args.Gas = rpc.NewHexNumber(defaultGas)
}
if args.GasPrice == nil {
args.GasPrice = rpc.NewHexNumber(s.gpo.SuggestPrice())
}
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 == nil)
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 nil, err
}
data, err := rlp.EncodeToBytes(signedTx)
if err != nil {
return nil, err
}
return &SignTransactionResult{"0x" + common.Bytes2Hex(data), newTx(tx)}, nil
}
// PendingTransactions returns the transactions that are in the transaction pool and have a from address that is one of
// the accounts this node manages.
func (s *PublicTransactionPoolAPI) PendingTransactions() ([]*RPCTransaction, error) {
accounts, err := s.am.Accounts()
if err != nil {
return nil, err
}
accountSet := set.New()
for _, account := range accounts {
accountSet.Add(account.Address)
}
pending := s.txPool.GetTransactions()
transactions := make([]*RPCTransaction, 0)
for _, tx := range pending {
if from, _ := tx.FromFrontier(); accountSet.Has(from) {
transactions = append(transactions, newRPCPendingTransaction(tx))
}
}
return transactions, nil
}
// NewPendingTransaction creates a subscription that is triggered each time a transaction enters the transaction pool
// and is send from one of the transactions this nodes manages.
func (s *PublicTransactionPoolAPI) NewPendingTransactions(ctx context.Context) (rpc.Subscription, error) {
notifier, supported := ctx.Value(rpc.NotifierContextKey).(rpc.Notifier)
if !supported {
return nil, rpc.ErrNotificationsUnsupported
}
subscription, err := notifier.NewSubscription(func(id string) {
s.muPendingTxSubs.Lock()
delete(s.pendingTxSubs, id)
s.muPendingTxSubs.Unlock()
})
if err != nil {
return nil, err
}
s.muPendingTxSubs.Lock()
s.pendingTxSubs[subscription.ID()] = subscription
s.muPendingTxSubs.Unlock()
return subscription, nil
}
// Resend accepts an existing transaction and a new gas price and limit. It will remove the given transaction from the
// pool and reinsert it with the new gas price and limit.
func (s *PublicTransactionPoolAPI) Resend(tx *Tx, gasPrice, gasLimit *rpc.HexNumber) (common.Hash, error) {
pending := s.txPool.GetTransactions()
for _, p := range pending {
if pFrom, err := p.FromFrontier(); err == nil && pFrom == tx.From && p.SigHash() == tx.tx.SigHash() {
if gasPrice == nil {
gasPrice = rpc.NewHexNumber(tx.tx.GasPrice())
}
if gasLimit == nil {
gasLimit = rpc.NewHexNumber(tx.tx.Gas())
}
var newTx *types.Transaction
contractCreation := (tx.tx.To() == nil)
if contractCreation {
newTx = types.NewContractCreation(tx.tx.Nonce(), tx.tx.Value(), gasPrice.BigInt(), gasLimit.BigInt(), tx.tx.Data())
} else {
newTx = types.NewTransaction(tx.tx.Nonce(), *tx.tx.To(), tx.tx.Value(), gasPrice.BigInt(), gasLimit.BigInt(), tx.tx.Data())
}
signedTx, err := s.sign(tx.From, newTx)
if err != nil {
return common.Hash{}, err
}
s.txPool.RemoveTx(tx.Hash)
if err = s.txPool.Add(signedTx); err != nil {
return common.Hash{}, err
}
return signedTx.Hash(), nil
}
}
return common.Hash{}, fmt.Errorf("Transaction %#x not found", tx.Hash)
}
// PrivateAdminAPI is the collection of Etheruem APIs exposed over the private
// admin endpoint.
type PrivateAdminAPI struct {
eth *Ethereum
}
// NewPrivateAdminAPI creates a new API definition for the private admin methods
// of the Ethereum service.
func NewPrivateAdminAPI(eth *Ethereum) *PrivateAdminAPI {
return &PrivateAdminAPI{eth: eth}
}
// SetSolc sets the Solidity compiler path to be used by the node.
func (api *PrivateAdminAPI) SetSolc(path string) (string, error) {
solc, err := api.eth.SetSolc(path)
if err != nil {
return "", err
}
return solc.Info(), nil
}
// ExportChain exports the current blockchain into a local file.
func (api *PrivateAdminAPI) ExportChain(file string) (bool, error) {
// Make sure we can create the file to export into
out, err := os.OpenFile(file, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return false, err
}
defer out.Close()
// Export the blockchain
if err := api.eth.BlockChain().Export(out); err != nil {
return false, err
}
return true, nil
}
func hasAllBlocks(chain *core.BlockChain, bs []*types.Block) bool {
for _, b := range bs {
if !chain.HasBlock(b.Hash()) {
return false
}
}
return true
}
// ImportChain imports a blockchain from a local file.
func (api *PrivateAdminAPI) ImportChain(file string) (bool, error) {
// Make sure the can access the file to import
in, err := os.Open(file)
if err != nil {
return false, err
}
defer in.Close()
// Run actual the import in pre-configured batches
stream := rlp.NewStream(in, 0)
blocks, index := make([]*types.Block, 0, 2500), 0
for batch := 0; ; batch++ {
// Load a batch of blocks from the input file
for len(blocks) < cap(blocks) {
block := new(types.Block)
if err := stream.Decode(block); err == io.EOF {
break
} else if err != nil {
return false, fmt.Errorf("block %d: failed to parse: %v", index, err)
}
blocks = append(blocks, block)
index++
}
if len(blocks) == 0 {
break
}
if hasAllBlocks(api.eth.BlockChain(), blocks) {
blocks = blocks[:0]
continue
}
// Import the batch and reset the buffer
if _, err := api.eth.BlockChain().InsertChain(blocks); err != nil {
return false, fmt.Errorf("batch %d: failed to insert: %v", batch, err)
}
blocks = blocks[:0]
}
return true, nil
}
// PublicDebugAPI is the collection of Etheruem APIs exposed over the public
// debugging endpoint.
type PublicDebugAPI struct {
eth *Ethereum
}
// NewPublicDebugAPI creates a new API definition for the public debug methods
// of the Ethereum service.
func NewPublicDebugAPI(eth *Ethereum) *PublicDebugAPI {
return &PublicDebugAPI{eth: eth}
}
// DumpBlock retrieves the entire state of the database at a given block.
func (api *PublicDebugAPI) DumpBlock(number uint64) (state.World, error) {
block := api.eth.BlockChain().GetBlockByNumber(number)
if block == nil {
return state.World{}, fmt.Errorf("block #%d not found", number)
}
stateDb, err := state.New(block.Root(), api.eth.ChainDb())
if err != nil {
return state.World{}, err
}
return stateDb.RawDump(), nil
}
// GetBlockRlp retrieves the RLP encoded for of a single block.
func (api *PublicDebugAPI) GetBlockRlp(number uint64) (string, error) {
block := api.eth.BlockChain().GetBlockByNumber(number)
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
encoded, err := rlp.EncodeToBytes(block)
if err != nil {
return "", err
}
return fmt.Sprintf("%x", encoded), nil
}
// PrintBlock retrieves a block and returns its pretty printed form.
func (api *PublicDebugAPI) PrintBlock(number uint64) (string, error) {
block := api.eth.BlockChain().GetBlockByNumber(number)
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
return fmt.Sprintf("%s", block), nil
}
// SeedHash retrieves the seed hash of a block.
func (api *PublicDebugAPI) SeedHash(number uint64) (string, error) {
block := api.eth.BlockChain().GetBlockByNumber(number)
if block == nil {
return "", fmt.Errorf("block #%d not found", number)
}
hash, err := ethash.GetSeedHash(number)
if err != nil {
return "", err
}
return fmt.Sprintf("0x%x", hash), nil
}
// PrivateDebugAPI is the collection of Etheruem APIs exposed over the private
// debugging endpoint.
type PrivateDebugAPI struct {
config *core.ChainConfig
eth *Ethereum
}
// NewPrivateDebugAPI creates a new API definition for the private debug methods
// of the Ethereum service.
func NewPrivateDebugAPI(config *core.ChainConfig, eth *Ethereum) *PrivateDebugAPI {
return &PrivateDebugAPI{config: config, eth: eth}
}
// BlockTraceResults is the returned value when replaying a block to check for
// consensus results and full VM trace logs for all included transactions.
type BlockTraceResult struct {
Validated bool `json:"validated"`
StructLogs []structLogRes `json:"structLogs"`
Error string `json:"error"`
}
// TraceBlock processes the given block's RLP but does not import the block in to
// the chain.
func (api *PrivateDebugAPI) TraceBlock(blockRlp []byte, config vm.Config) BlockTraceResult {
var block types.Block
err := rlp.Decode(bytes.NewReader(blockRlp), &block)
if err != nil {
return BlockTraceResult{Error: fmt.Sprintf("could not decode block: %v", err)}
}
validated, logs, err := api.traceBlock(&block, config)
return BlockTraceResult{
Validated: validated,
StructLogs: formatLogs(logs),
Error: formatError(err),
}
}
// TraceBlockFromFile loads the block's RLP from the given file name and attempts to
// process it but does not import the block in to the chain.
func (api *PrivateDebugAPI) TraceBlockFromFile(file string, config vm.Config) BlockTraceResult {
blockRlp, err := ioutil.ReadFile(file)
if err != nil {
return BlockTraceResult{Error: fmt.Sprintf("could not read file: %v", err)}
}
return api.TraceBlock(blockRlp, config)
}
// TraceProcessBlock processes the block by canonical block number.
func (api *PrivateDebugAPI) TraceBlockByNumber(number uint64, config vm.Config) BlockTraceResult {
// Fetch the block that we aim to reprocess
block := api.eth.BlockChain().GetBlockByNumber(number)
if block == nil {
return BlockTraceResult{Error: fmt.Sprintf("block #%d not found", number)}
}
validated, logs, err := api.traceBlock(block, config)
return BlockTraceResult{
Validated: validated,
StructLogs: formatLogs(logs),
Error: formatError(err),
}
}
// TraceBlockByHash processes the block by hash.
func (api *PrivateDebugAPI) TraceBlockByHash(hash common.Hash, config vm.Config) BlockTraceResult {
// Fetch the block that we aim to reprocess
block := api.eth.BlockChain().GetBlock(hash)
if block == nil {
return BlockTraceResult{Error: fmt.Sprintf("block #%x not found", hash)}
}
validated, logs, err := api.traceBlock(block, config)
return BlockTraceResult{
Validated: validated,
StructLogs: formatLogs(logs),
Error: formatError(err),
}
}
// TraceCollector collects EVM structered logs.
//
// TraceCollector implements vm.Collector
type TraceCollector struct {
traces []vm.StructLog
}
// AddStructLog adds a structered log.
func (t *TraceCollector) AddStructLog(slog vm.StructLog) {
t.traces = append(t.traces, slog)
}
// traceBlock processes the given block but does not save the state.
func (api *PrivateDebugAPI) traceBlock(block *types.Block, config vm.Config) (bool, []vm.StructLog, error) {
// Validate and reprocess the block
var (
blockchain = api.eth.BlockChain()
validator = blockchain.Validator()
processor = blockchain.Processor()
collector = &TraceCollector{}
)
config.Debug = true // make sure debug is set.
config.Logger.Collector = collector
if err := core.ValidateHeader(api.config, blockchain.AuxValidator(), block.Header(), blockchain.GetHeader(block.ParentHash()), true, false); err != nil {
return false, collector.traces, err
}
statedb, err := state.New(blockchain.GetBlock(block.ParentHash()).Root(), api.eth.ChainDb())
if err != nil {
return false, collector.traces, err
}
receipts, _, usedGas, err := processor.Process(block, statedb, config)
if err != nil {
return false, collector.traces, err
}
if err := validator.ValidateState(block, blockchain.GetBlock(block.ParentHash()), statedb, receipts, usedGas); err != nil {
return false, collector.traces, err
}
return true, collector.traces, nil
}
// SetHead rewinds the head of the blockchain to a previous block.
func (api *PrivateDebugAPI) SetHead(number uint64) {
api.eth.BlockChain().SetHead(number)
}
// ExecutionResult groups all structured logs emitted by the EVM
// while replaying a transaction in debug mode as well as the amount of
// gas used and the return value
type ExecutionResult struct {
Gas *big.Int `json:"gas"`
ReturnValue string `json:"returnValue"`
StructLogs []structLogRes `json:"structLogs"`
}
// structLogRes stores a structured log emitted by the EVM while replaying a
// transaction in debug mode
type structLogRes struct {
Pc uint64 `json:"pc"`
Op string `json:"op"`
Gas *big.Int `json:"gas"`
GasCost *big.Int `json:"gasCost"`
Depth int `json:"depth"`
Error string `json:"error"`
Stack []string `json:"stack"`
Memory []string `json:"memory"`
Storage map[string]string `json:"storage"`
}
// VmLoggerOptions are the options used for debugging transactions and capturing
// specific data.
type VmLoggerOptions struct {
DisableMemory bool // disable memory capture
DisableStack bool // disable stack capture
DisableStorage bool // disable storage capture
FullStorage bool // show full storage (slow)
}
// formatLogs formats EVM returned structured logs for json output
func formatLogs(structLogs []vm.StructLog) []structLogRes {
formattedStructLogs := make([]structLogRes, len(structLogs))
for index, trace := range structLogs {
formattedStructLogs[index] = structLogRes{
Pc: trace.Pc,
Op: trace.Op.String(),
Gas: trace.Gas,
GasCost: trace.GasCost,
Depth: trace.Depth,
Error: formatError(trace.Err),
Stack: make([]string, len(trace.Stack)),
Storage: make(map[string]string),
}
for i, stackValue := range trace.Stack {
formattedStructLogs[index].Stack[i] = fmt.Sprintf("%x", common.LeftPadBytes(stackValue.Bytes(), 32))
}
for i := 0; i+32 <= len(trace.Memory); i += 32 {
formattedStructLogs[index].Memory = append(formattedStructLogs[index].Memory, fmt.Sprintf("%x", trace.Memory[i:i+32]))
}
for i, storageValue := range trace.Storage {
formattedStructLogs[index].Storage[fmt.Sprintf("%x", i)] = fmt.Sprintf("%x", storageValue)
}
}
return formattedStructLogs
}
// formatError formats a Go error into either an empty string or the data content
// of the error itself.
func formatError(err error) string {
if err == nil {
return ""
}
return err.Error()
}
// TraceTransaction returns the structured logs created during the execution of EVM
// and returns them as a JSON object.
func (s *PrivateDebugAPI) TraceTransaction(txHash common.Hash, logger vm.LogConfig) (*ExecutionResult, error) {
// Retrieve the tx from the chain
tx, _, blockIndex, _ := core.GetTransaction(s.eth.ChainDb(), txHash)
if tx == nil {
return nil, fmt.Errorf("Transaction not found")
}
block := s.eth.BlockChain().GetBlockByNumber(blockIndex - 1)
if block == nil {
return nil, fmt.Errorf("Unable to retrieve prior block")
}
// Create the state database
stateDb, err := state.New(block.Root(), s.eth.ChainDb())
if err != nil {
return nil, err
}
txFrom, err := tx.FromFrontier()
if err != nil {
return nil, fmt.Errorf("Unable to create transaction sender")
}
from := stateDb.GetOrNewStateObject(txFrom)
msg := callmsg{
from: from,
to: tx.To(),
gas: tx.Gas(),
gasPrice: tx.GasPrice(),
value: tx.Value(),
data: tx.Data(),
}
vmenv := core.NewEnv(stateDb, s.config, s.eth.BlockChain(), msg, block.Header(), vm.Config{
Debug: true,
Logger: logger,
})
gp := new(core.GasPool).AddGas(block.GasLimit())
ret, gas, err := core.ApplyMessage(vmenv, msg, gp)
if err != nil {
return nil, fmt.Errorf("Error executing transaction %v", err)
}
return &ExecutionResult{
Gas: gas,
ReturnValue: fmt.Sprintf("%x", ret),
StructLogs: formatLogs(vmenv.StructLogs()),
}, nil
}
func (s *PublicBlockChainAPI) TraceCall(args CallArgs, blockNr rpc.BlockNumber) (*ExecutionResult, error) {
// Fetch the state associated with the block number
stateDb, block, err := stateAndBlockByNumber(s.miner, s.bc, blockNr, s.chainDb)
if stateDb == nil || err != nil {
return nil, err
}
stateDb = stateDb.Copy()
// Retrieve the account state object to interact with
var from *state.StateObject
if args.From == (common.Address{}) {
accounts, err := s.am.Accounts()
if err != nil || len(accounts) == 0 {
from = stateDb.GetOrNewStateObject(common.Address{})
} else {
from = stateDb.GetOrNewStateObject(accounts[0].Address)
}
} else {
from = stateDb.GetOrNewStateObject(args.From)
}
from.SetBalance(common.MaxBig)
// Assemble the CALL invocation
msg := callmsg{
from: from,
to: args.To,
gas: args.Gas.BigInt(),
gasPrice: args.GasPrice.BigInt(),
value: args.Value.BigInt(),
data: common.FromHex(args.Data),
}
if msg.gas.Cmp(common.Big0) == 0 {
msg.gas = big.NewInt(50000000)
}
if msg.gasPrice.Cmp(common.Big0) == 0 {
msg.gasPrice = new(big.Int).Mul(big.NewInt(50), common.Shannon)
}
// Execute the call and return
vmenv := core.NewEnv(stateDb, s.config, s.bc, msg, block.Header(), vm.Config{
Debug: true,
})
gp := new(core.GasPool).AddGas(common.MaxBig)
ret, gas, err := core.ApplyMessage(vmenv, msg, gp)
return &ExecutionResult{
Gas: gas,
ReturnValue: fmt.Sprintf("%x", ret),
StructLogs: formatLogs(vmenv.StructLogs()),
}, nil
}
// PublicNetAPI offers network related RPC methods
type PublicNetAPI struct {
net *p2p.Server
networkVersion int
}
// NewPublicNetAPI creates a new net API instance.
func NewPublicNetAPI(net *p2p.Server, networkVersion int) *PublicNetAPI {
return &PublicNetAPI{net, networkVersion}
}
// Listening returns an indication if the node is listening for network connections.
func (s *PublicNetAPI) Listening() bool {
return true // always listening
}
// Peercount returns the number of connected peers
func (s *PublicNetAPI) PeerCount() *rpc.HexNumber {
return rpc.NewHexNumber(s.net.PeerCount())
}
// ProtocolVersion returns the current ethereum protocol version.
func (s *PublicNetAPI) Version() string {
return fmt.Sprintf("%d", s.networkVersion)
}
