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core, consensus: pluggable consensus engines (#3817)

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This commit adds pluggable consensus engines to go-ethereum. In short, it
introduces a generic consensus interface, and refactors the entire codebase to
use this interface.
This commit is contained in:
Péter Szilágyi
2017-04-05 01:16:29 +03:00
committed by Felix Lange
parent e50a5b7771
commit 09777952ee
61 changed files with 1681 additions and 1426 deletions
Download Patch File Download Diff File Expand all files Collapse all files

93
eth/api.go
View File

@ -26,7 +26,6 @@ import (
"io/ioutil"
"math/big"
"os"
"runtime"
"strings"
"time"
@ -37,6 +36,7 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/internal/ethapi"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/miner"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
@ -56,18 +56,18 @@ func NewPublicEthereumAPI(e *Ethereum) *PublicEthereumAPI {
}
// Etherbase is the address that mining rewards will be send to
func (s *PublicEthereumAPI) Etherbase() (common.Address, error) {
return s.e.Etherbase()
func (api *PublicEthereumAPI) Etherbase() (common.Address, error) {
return api.e.Etherbase()
}
// Coinbase is the address that mining rewards will be send to (alias for Etherbase)
func (s *PublicEthereumAPI) Coinbase() (common.Address, error) {
return s.Etherbase()
func (api *PublicEthereumAPI) Coinbase() (common.Address, error) {
return api.Etherbase()
}
// Hashrate returns the POW hashrate
func (s *PublicEthereumAPI) Hashrate() hexutil.Uint64 {
return hexutil.Uint64(s.e.Miner().HashRate())
func (api *PublicEthereumAPI) Hashrate() hexutil.Uint64 {
return hexutil.Uint64(api.e.Miner().HashRate())
}
// PublicMinerAPI provides an API to control the miner.
@ -79,34 +79,34 @@ type PublicMinerAPI struct {
// NewPublicMinerAPI create a new PublicMinerAPI instance.
func NewPublicMinerAPI(e *Ethereum) *PublicMinerAPI {
agent := miner.NewRemoteAgent(e.Pow())
agent := miner.NewRemoteAgent(e.BlockChain(), e.Engine())
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()
func (api *PublicMinerAPI) Mining() bool {
return api.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 types.BlockNonce, solution, digest common.Hash) bool {
return s.agent.SubmitWork(nonce, digest, solution)
func (api *PublicMinerAPI) SubmitWork(nonce types.BlockNonce, solution, digest common.Hash) bool {
return api.agent.SubmitWork(nonce, 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() ([3]string, error) {
if !s.e.IsMining() {
if err := s.e.StartMining(0); err != nil {
func (api *PublicMinerAPI) GetWork() ([3]string, error) {
if !api.e.IsMining() {
if err := api.e.StartMining(); err != nil {
return [3]string{}, err
}
}
work, err := s.agent.GetWork()
work, err := api.agent.GetWork()
if err != nil {
return work, fmt.Errorf("mining not ready: %v", err)
}
@ -116,8 +116,8 @@ func (s *PublicMinerAPI) GetWork() ([3]string, error) {
// 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 hexutil.Uint64, id common.Hash) bool {
s.agent.SubmitHashrate(id, uint64(hashrate))
func (api *PublicMinerAPI) SubmitHashrate(hashrate hexutil.Uint64, id common.Hash) bool {
api.agent.SubmitHashrate(id, uint64(hashrate))
return true
}
@ -132,47 +132,59 @@ func NewPrivateMinerAPI(e *Ethereum) *PrivateMinerAPI {
return &PrivateMinerAPI{e: e}
}
// Start the miner with the given number of threads. If threads is nil the number of
// workers started is equal to the number of logical CPU's that are usable by this process.
func (s *PrivateMinerAPI) Start(threads *int) (bool, error) {
var err error
if threads == nil {
err = s.e.StartMining(runtime.NumCPU())
} else {
err = s.e.StartMining(*threads)
// Start the miner with the given number of threads. If threads is nil the number
// of workers started is equal to the number of logical CPUs that are usable by
// this process. If mining is already running, this method adjust the number of
// threads allowed to use.
func (api *PrivateMinerAPI) Start(threads *int) error {
// Set the number of threads if the seal engine supports it
if threads != nil {
type threaded interface {
SetThreads(threads int)
}
if th, ok := api.e.engine.(threaded); ok {
log.Info("Updated mining threads", "threads", *threads)
th.SetThreads(*threads)
} else {
log.Warn("Current seal engine isn't threaded")
}
}
return err == nil, err
// Start the miner and return
if !api.e.IsMining() {
return api.e.StartMining()
}
return nil
}
// Stop the miner
func (s *PrivateMinerAPI) Stop() bool {
s.e.StopMining()
func (api *PrivateMinerAPI) Stop() bool {
api.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 {
func (api *PrivateMinerAPI) SetExtra(extra string) (bool, error) {
if err := api.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 hexutil.Big) bool {
s.e.Miner().SetGasPrice((*big.Int)(&gasPrice))
func (api *PrivateMinerAPI) SetGasPrice(gasPrice hexutil.Big) bool {
api.e.Miner().SetGasPrice((*big.Int)(&gasPrice))
return true
}
// SetEtherbase sets the etherbase of the miner
func (s *PrivateMinerAPI) SetEtherbase(etherbase common.Address) bool {
s.e.SetEtherbase(etherbase)
func (api *PrivateMinerAPI) SetEtherbase(etherbase common.Address) bool {
api.e.SetEtherbase(etherbase)
return true
}
// GetHashrate returns the current hashrate of the miner.
func (s *PrivateMinerAPI) GetHashrate() uint64 {
return uint64(s.e.miner.HashRate())
func (api *PrivateMinerAPI) GetHashrate() uint64 {
return uint64(api.e.miner.HashRate())
}
// PrivateAdminAPI is the collection of Etheruem full node-related APIs
@ -321,7 +333,7 @@ type TraceArgs struct {
Timeout *string
}
// TraceBlock processes the given block's RLP but does not import the block in to
// TraceBlock processes the given block'api RLP but does not import the block in to
// the chain.
func (api *PrivateDebugAPI) TraceBlock(blockRlp []byte, config *vm.LogConfig) BlockTraceResult {
var block types.Block
@ -338,7 +350,7 @@ func (api *PrivateDebugAPI) TraceBlock(blockRlp []byte, config *vm.LogConfig) Bl
}
}
// TraceBlockFromFile loads the block's RLP from the given file name and attempts to
// TraceBlockFromFile loads the block'api 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.LogConfig) BlockTraceResult {
blockRlp, err := ioutil.ReadFile(file)
@ -395,8 +407,7 @@ func (api *PrivateDebugAPI) traceBlock(block *types.Block, logConfig *vm.LogConf
Debug: true,
Tracer: structLogger,
}
if err := core.ValidateHeader(api.config, blockchain.AuxValidator(), block.Header(), blockchain.GetHeader(block.ParentHash(), block.NumberU64()-1), true, false); err != nil {
if err := api.eth.engine.VerifyHeader(blockchain, block.Header(), true); err != nil {
return false, structLogger.StructLogs(), err
}
statedb, err := blockchain.StateAt(blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1).Root())

49
eth/backend.go
View File

@ -22,10 +22,11 @@ import (
"math/big"
"regexp"
"sync"
"time"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -40,18 +41,9 @@ import (
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rpc"
)
const (
epochLength = 30000
ethashRevision = 23
autoDAGcheckInterval = 10 * time.Hour
autoDAGepochHeight = epochLength / 2
)
var (
datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
portInUseErrRE = regexp.MustCompile("address already in use")
@ -124,7 +116,7 @@ type Ethereum struct {
chainDb ethdb.Database // Block chain database
eventMux *event.TypeMux
pow pow.PoW
engine consensus.Engine
accountManager *accounts.Manager
ApiBackend *EthApiBackend
@ -163,7 +155,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
chainConfig: chainConfig,
eventMux: ctx.EventMux,
accountManager: ctx.AccountManager,
pow: CreatePoW(ctx, config),
engine: CreateConsensusEngine(ctx, config, chainConfig, chainDb),
shutdownChan: make(chan bool),
stopDbUpgrade: stopDbUpgrade,
netVersionId: config.NetworkId,
@ -186,7 +178,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
}
vmConfig := vm.Config{EnablePreimageRecording: config.EnablePreimageRecording}
eth.blockchain, err = core.NewBlockChain(chainDb, eth.chainConfig, eth.pow, eth.eventMux, vmConfig)
eth.blockchain, err = core.NewBlockChain(chainDb, eth.chainConfig, eth.engine, eth.eventMux, vmConfig)
if err != nil {
return nil, err
}
@ -211,10 +203,11 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
}
}
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, maxPeers, eth.eventMux, eth.txPool, eth.pow, eth.blockchain, chainDb); err != nil {
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, maxPeers, eth.eventMux, eth.txPool, eth.engine, eth.blockchain, chainDb); err != nil {
return nil, err
}
eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.pow)
eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.engine)
eth.miner.SetGasPrice(config.GasPrice)
eth.miner.SetExtra(config.ExtraData)
@ -241,20 +234,20 @@ func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Data
return db, err
}
// CreatePoW creates the required type of PoW instance for an Ethereum service
func CreatePoW(ctx *node.ServiceContext, config *Config) pow.PoW {
// CreateConsensusEngine creates the required type of consensus engine instance for an Ethereum service
func CreateConsensusEngine(ctx *node.ServiceContext, config *Config, chainConfig *params.ChainConfig, db ethdb.Database) consensus.Engine {
switch {
case config.PowFake:
log.Warn("Ethash used in fake mode")
return pow.FakePow{}
return ethash.NewFaker()
case config.PowTest:
log.Warn("Ethash used in test mode")
return pow.NewTestEthash()
return ethash.NewTester()
case config.PowShared:
log.Warn("Ethash used in shared mode")
return pow.NewSharedEthash()
return ethash.NewShared()
default:
return pow.NewFullEthash(ctx.ResolvePath(config.EthashCacheDir), config.EthashCachesInMem, config.EthashCachesOnDisk,
return ethash.New(ctx.ResolvePath(config.EthashCacheDir), config.EthashCachesInMem, config.EthashCachesOnDisk,
config.EthashDatasetDir, config.EthashDatasetsInMem, config.EthashDatasetsOnDisk)
}
}
@ -262,7 +255,13 @@ func CreatePoW(ctx *node.ServiceContext, config *Config) pow.PoW {
// APIs returns the collection of RPC services the ethereum package offers.
// NOTE, some of these services probably need to be moved to somewhere else.
func (s *Ethereum) APIs() []rpc.API {
return append(ethapi.GetAPIs(s.ApiBackend, s.solcPath), []rpc.API{
apis := ethapi.GetAPIs(s.ApiBackend, s.solcPath)
// Append any APIs exposed explicitly by the consensus engine
apis = append(apis, s.engine.APIs(s.BlockChain())...)
// Append all the local APIs and return
return append(apis, []rpc.API{
{
Namespace: "eth",
Version: "1.0",
@ -332,13 +331,13 @@ func (self *Ethereum) SetEtherbase(etherbase common.Address) {
self.miner.SetEtherbase(etherbase)
}
func (s *Ethereum) StartMining(threads int) error {
func (s *Ethereum) StartMining() error {
eb, err := s.Etherbase()
if err != nil {
log.Error("Cannot start mining without etherbase", "err", err)
return fmt.Errorf("etherbase missing: %v", err)
}
go s.miner.Start(eb, threads)
go s.miner.Start(eb)
return nil
}
@ -350,7 +349,7 @@ func (s *Ethereum) AccountManager() *accounts.Manager { return s.accountManager
func (s *Ethereum) BlockChain() *core.BlockChain { return s.blockchain }
func (s *Ethereum) TxPool() *core.TxPool { return s.txPool }
func (s *Ethereum) EventMux() *event.TypeMux { return s.eventMux }
func (s *Ethereum) Pow() pow.PoW { return s.pow }
func (s *Ethereum) Engine() consensus.Engine { return s.engine }
func (s *Ethereum) ChainDb() ethdb.Database { return s.chainDb }
func (s *Ethereum) IsListening() bool { return true } // Always listening
func (s *Ethereum) EthVersion() int { return int(s.protocolManager.SubProtocols[0].Version) }

12
eth/fetcher/fetcher.go
View File

@ -52,8 +52,8 @@ type headerRequesterFn func(common.Hash) error
// bodyRequesterFn is a callback type for sending a body retrieval request.
type bodyRequesterFn func([]common.Hash) error
// blockValidatorFn is a callback type to verify a block's header for fast propagation.
type blockValidatorFn func(block *types.Block, parent *types.Block) error
// headerVerifierFn is a callback type to verify a block's header for fast propagation.
type headerVerifierFn func(header *types.Header) error
// blockBroadcasterFn is a callback type for broadcasting a block to connected peers.
type blockBroadcasterFn func(block *types.Block, propagate bool)
@ -129,7 +129,7 @@ type Fetcher struct {
// Callbacks
getBlock blockRetrievalFn // Retrieves a block from the local chain
validateBlock blockValidatorFn // Checks if a block's headers have a valid proof of work
verifyHeader headerVerifierFn // Checks if a block's headers have a valid proof of work
broadcastBlock blockBroadcasterFn // Broadcasts a block to connected peers
chainHeight chainHeightFn // Retrieves the current chain's height
insertChain chainInsertFn // Injects a batch of blocks into the chain
@ -144,7 +144,7 @@ type Fetcher struct {
}
// New creates a block fetcher to retrieve blocks based on hash announcements.
func New(getBlock blockRetrievalFn, validateBlock blockValidatorFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
func New(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
return &Fetcher{
notify: make(chan *announce),
inject: make(chan *inject),
@ -162,7 +162,7 @@ func New(getBlock blockRetrievalFn, validateBlock blockValidatorFn, broadcastBlo
queues: make(map[string]int),
queued: make(map[common.Hash]*inject),
getBlock: getBlock,
validateBlock: validateBlock,
verifyHeader: verifyHeader,
broadcastBlock: broadcastBlock,
chainHeight: chainHeight,
insertChain: insertChain,
@ -648,7 +648,7 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
return
}
// Quickly validate the header and propagate the block if it passes
switch err := f.validateBlock(block, parent); err {
switch err := f.verifyHeader(block.Header()); err {
case nil:
// All ok, quickly propagate to our peers
propBroadcastOutTimer.UpdateSince(block.ReceivedAt)

6
eth/fetcher/fetcher_test.go
View File

@ -91,7 +91,7 @@ func newTester() *fetcherTester {
blocks: map[common.Hash]*types.Block{genesis.Hash(): genesis},
drops: make(map[string]bool),
}
tester.fetcher = New(tester.getBlock, tester.verifyBlock, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher = New(tester.getBlock, tester.verifyHeader, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher.Start()
return tester
@ -105,8 +105,8 @@ func (f *fetcherTester) getBlock(hash common.Hash) *types.Block {
return f.blocks[hash]
}
// verifyBlock is a nop placeholder for the block header verification.
func (f *fetcherTester) verifyBlock(block *types.Block, parent *types.Block) error {
// verifyHeader is a nop placeholder for the block header verification.
func (f *fetcherTester) verifyHeader(header *types.Header) error {
return nil
}

11
eth/handler.go
View File

@ -27,6 +27,8 @@ import (
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/misc"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/downloader"
@ -37,7 +39,6 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
)
@ -97,7 +98,7 @@ type ProtocolManager struct {
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
// with the ethereum network.
func NewProtocolManager(config *params.ChainConfig, fastSync bool, networkId int, maxPeers int, mux *event.TypeMux, txpool txPool, pow pow.PoW, blockchain *core.BlockChain, chaindb ethdb.Database) (*ProtocolManager, error) {
func NewProtocolManager(config *params.ChainConfig, fastSync bool, networkId int, maxPeers int, mux *event.TypeMux, txpool txPool, engine consensus.Engine, blockchain *core.BlockChain, chaindb ethdb.Database) (*ProtocolManager, error) {
// Create the protocol manager with the base fields
manager := &ProtocolManager{
networkId: networkId,
@ -165,8 +166,8 @@ func NewProtocolManager(config *params.ChainConfig, fastSync bool, networkId int
blockchain.GetTdByHash, blockchain.InsertHeaderChain, manager.insertChain, blockchain.InsertReceiptChain, blockchain.Rollback,
manager.removePeer)
validator := func(block *types.Block, parent *types.Block) error {
return core.ValidateHeader(config, pow, block.Header(), parent.Header(), true, false)
validator := func(header *types.Header) error {
return engine.VerifyHeader(blockchain, header, true)
}
heighter := func() uint64 {
return blockchain.CurrentBlock().NumberU64()
@ -448,7 +449,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
p.forkDrop = nil
// Validate the header and either drop the peer or continue
if err := core.ValidateDAOHeaderExtraData(pm.chainconfig, headers[0]); err != nil {
if err := misc.VerifyDAOHeaderExtraData(pm.chainconfig, headers[0]); err != nil {
p.Log().Debug("Verified to be on the other side of the DAO fork, dropping")
return err
}

4
eth/handler_test.go
View File

@ -24,6 +24,7 @@ import (
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
@ -34,7 +35,6 @@ import (
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
)
var bigTxGas = new(big.Int).SetUint64(params.TxGas)
@ -469,7 +469,7 @@ func testDAOChallenge(t *testing.T, localForked, remoteForked bool, timeout bool
// Create a DAO aware protocol manager
var (
evmux = new(event.TypeMux)
pow = new(pow.FakePow)
pow = ethash.NewFaker()
db, _ = ethdb.NewMemDatabase()
config = &params.ChainConfig{DAOForkBlock: big.NewInt(1), DAOForkSupport: localForked}
gspec = &core.Genesis{Config: config}

14
eth/helper_test.go
View File

@ -28,6 +28,7 @@ import (
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -37,7 +38,6 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
)
var (
@ -50,22 +50,22 @@ var (
// channels for different events.
func newTestProtocolManager(fastSync bool, blocks int, generator func(int, *core.BlockGen), newtx chan<- []*types.Transaction) (*ProtocolManager, error) {
var (
evmux = new(event.TypeMux)
pow = new(pow.FakePow)
db, _ = ethdb.NewMemDatabase()
gspec = &core.Genesis{
evmux = new(event.TypeMux)
engine = ethash.NewFaker()
db, _ = ethdb.NewMemDatabase()
gspec = &core.Genesis{
Config: params.TestChainConfig,
Alloc: core.GenesisAlloc{testBank: {Balance: big.NewInt(1000000)}},
}
genesis = gspec.MustCommit(db)
blockchain, _ = core.NewBlockChain(db, gspec.Config, pow, evmux, vm.Config{})
blockchain, _ = core.NewBlockChain(db, gspec.Config, engine, evmux, vm.Config{})
)
chain, _ := core.GenerateChain(gspec.Config, genesis, db, blocks, generator)
if _, err := blockchain.InsertChain(chain); err != nil {
panic(err)
}
pm, err := NewProtocolManager(gspec.Config, fastSync, NetworkId, 1000, evmux, &testTxPool{added: newtx}, pow, blockchain, db)
pm, err := NewProtocolManager(gspec.Config, fastSync, NetworkId, 1000, evmux, &testTxPool{added: newtx}, engine, blockchain, db)
if err != nil {
return nil, err
}