all: remove ethash pow, only retain shims needed for consensus and tests (#27178)

* all: remove ethash pow, only retain shims needed for consensus and tests

* all: thank you linter

* all: disallow launching Geth in legacy PoW mode

* cmd/env/internal/t8ntool: remove dangling ethash flag

cmd/devp2p/internal/ethtest/testdata/genesis.json

@@ -6,6 +6,7 @@
         "eip155Block": 0,
         "eip158Block": 0,
         "byzantiumBlock": 0,
+        "terminalTotalDifficultyPassed": true,
         "ethash": {}
     },
     "nonce": "0xdeadbeefdeadbeef",

cmd/evm/internal/t8ntool/block.go

@@ -28,7 +28,6 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/consensus/clique"
-	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
@@ -75,8 +74,6 @@ type bbInput struct {
 	Clique      *cliqueInput        `json:"clique,omitempty"`
 
 	Ethash bool                 `json:"-"`
-	EthashDir string               `json:"-"`
-	PowMode   ethash.Mode          `json:"-"`
 	Txs    []*types.Transaction `json:"-"`
 	Ommers []*types.Header      `json:"-"`
 }
@@ -162,8 +159,6 @@ func (i *bbInput) ToBlock() *types.Block {
 // SealBlock seals the given block using the configured engine.
 func (i *bbInput) SealBlock(block *types.Block) (*types.Block, error) {
 	switch {
-	case i.Ethash:
-		return i.sealEthash(block)
 	case i.Clique != nil:
 		return i.sealClique(block)
 	default:
@@ -171,33 +166,6 @@ func (i *bbInput) SealBlock(block *types.Block) (*types.Block, error) {
 	}
 }
 
-// sealEthash seals the given block using ethash.
-func (i *bbInput) sealEthash(block *types.Block) (*types.Block, error) {
-	if i.Header.Nonce != nil {
-		return nil, NewError(ErrorConfig, fmt.Errorf("sealing with ethash will overwrite provided nonce"))
-	}
-	ethashConfig := ethash.Config{
-		PowMode:        i.PowMode,
-		DatasetDir:     i.EthashDir,
-		CacheDir:       i.EthashDir,
-		DatasetsInMem:  1,
-		DatasetsOnDisk: 2,
-		CachesInMem:    2,
-		CachesOnDisk:   3,
-	}
-	engine := ethash.New(ethashConfig, nil, true)
-	defer engine.Close()
-	// Use a buffered chan for results.
-	// If the testmode is used, the sealer will return quickly, and complain
-	// "Sealing result is not read by miner" if it cannot write the result.
-	results := make(chan *types.Block, 1)
-	if err := engine.Seal(nil, block, results, nil); err != nil {
-		panic(fmt.Sprintf("failed to seal block: %v", err))
-	}
-	found := <-results
-	return block.WithSeal(found.Header()), nil
-}
-
 // sealClique seals the given block using clique.
 func (i *bbInput) sealClique(block *types.Block) (*types.Block, error) {
 	// If any clique value overwrites an explicit header value, fail
@@ -267,28 +235,8 @@ func readInput(ctx *cli.Context) (*bbInput, error) {
 		withdrawalsStr = ctx.String(InputWithdrawalsFlag.Name)
 		txsStr         = ctx.String(InputTxsRlpFlag.Name)
 		cliqueStr      = ctx.String(SealCliqueFlag.Name)
-		ethashOn       = ctx.Bool(SealEthashFlag.Name)
-		ethashDir      = ctx.String(SealEthashDirFlag.Name)
-		ethashMode     = ctx.String(SealEthashModeFlag.Name)
 		inputData      = &bbInput{}
 	)
-	if ethashOn && cliqueStr != "" {
-		return nil, NewError(ErrorConfig, fmt.Errorf("both ethash and clique sealing specified, only one may be chosen"))
-	}
-	if ethashOn {
-		inputData.Ethash = ethashOn
-		inputData.EthashDir = ethashDir
-		switch ethashMode {
-		case "normal":
-			inputData.PowMode = ethash.ModeNormal
-		case "test":
-			inputData.PowMode = ethash.ModeTest
-		case "fake":
-			inputData.PowMode = ethash.ModeFake
-		default:
-			return nil, NewError(ErrorConfig, fmt.Errorf("unknown pow mode: %s, supported modes: test, fake, normal", ethashMode))
-		}
-	}
 	if headerStr == stdinSelector || ommersStr == stdinSelector || txsStr == stdinSelector || cliqueStr == stdinSelector {
 		decoder := json.NewDecoder(os.Stdin)
 		if err := decoder.Decode(inputData); err != nil {

cmd/evm/internal/t8ntool/flags.go

@@ -125,19 +125,6 @@ var (
 		Name:  "seal.clique",
 		Usage: "Seal block with Clique. `stdin` or file name of where to find the Clique sealing data.",
 	}
-	SealEthashFlag = &cli.BoolFlag{
-		Name:  "seal.ethash",
-		Usage: "Seal block with ethash.",
-	}
-	SealEthashDirFlag = &cli.StringFlag{
-		Name:  "seal.ethash.dir",
-		Usage: "Path to ethash DAG. If none exists, a new DAG will be generated.",
-	}
-	SealEthashModeFlag = &cli.StringFlag{
-		Name:  "seal.ethash.mode",
-		Usage: "Defines the type and amount of PoW verification an ethash engine makes.",
-		Value: "normal",
-	}
 	RewardFlag = &cli.Int64Flag{
 		Name:  "state.reward",
 		Usage: "Mining reward. Set to -1 to disable",

cmd/evm/main.go

@@ -179,9 +179,6 @@ var blockBuilderCommand = &cli.Command{
 		t8ntool.InputWithdrawalsFlag,
 		t8ntool.InputTxsRlpFlag,
 		t8ntool.SealCliqueFlag,
-		t8ntool.SealEthashFlag,
-		t8ntool.SealEthashDirFlag,
-		t8ntool.SealEthashModeFlag,
 		t8ntool.VerbosityFlag,
 	},
 }

cmd/geth/genesis_test.go

@@ -41,7 +41,9 @@ var customGenesisTests = []struct {
 			"mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
 			"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
 			"timestamp"  : "0x00",
-			"config"     : {}
+			"config"     : {
+				"terminalTotalDifficultyPassed": true
+			}
 		}`,
 		query:  "eth.getBlock(0).nonce",
 		result: "0x0000000000001338",
@@ -61,7 +63,8 @@ var customGenesisTests = []struct {
 			"config"     : {
 				"homesteadBlock"                : 42,
 				"daoForkBlock"                  : 141,
-				"daoForkSupport" : true
+				"daoForkSupport"                : true,
+				"terminalTotalDifficultyPassed" : true
 			}
 		}`,
 		query:  "eth.getBlock(0).nonce",
@@ -111,7 +114,9 @@ func TestCustomBackend(t *testing.T) {
 			"mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
 			"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
 			"timestamp"  : "0x00",
-			"config"     : {}
+			"config"     : {
+				"terminalTotalDifficultyPassed": true
+			}
 		}`
 	type backendTest struct {
 		initArgs   []string

cmd/geth/main.go

@@ -66,14 +66,6 @@ var (
 		utils.SmartCardDaemonPathFlag,
 		utils.OverrideCancun,
 		utils.EnablePersonal,
-		utils.EthashCacheDirFlag,
-		utils.EthashCachesInMemoryFlag,
-		utils.EthashCachesOnDiskFlag,
-		utils.EthashCachesLockMmapFlag,
-		utils.EthashDatasetDirFlag,
-		utils.EthashDatasetsInMemoryFlag,
-		utils.EthashDatasetsOnDiskFlag,
-		utils.EthashDatasetsLockMmapFlag,
 		utils.TxPoolLocalsFlag,
 		utils.TxPoolNoLocalsFlag,
 		utils.TxPoolJournalFlag,
@@ -120,14 +112,11 @@ var (
 		utils.MaxPeersFlag,
 		utils.MaxPendingPeersFlag,
 		utils.MiningEnabledFlag,
-		utils.MinerThreadsFlag,
-		utils.MinerNotifyFlag,
 		utils.MinerGasLimitFlag,
 		utils.MinerGasPriceFlag,
 		utils.MinerEtherbaseFlag,
 		utils.MinerExtraDataFlag,
 		utils.MinerRecommitIntervalFlag,
-		utils.MinerNoVerifyFlag,
 		utils.MinerNewPayloadTimeout,
 		utils.NATFlag,
 		utils.NoDiscoverFlag,
@@ -142,13 +131,11 @@ var (
 		utils.VMEnableDebugFlag,
 		utils.NetworkIdFlag,
 		utils.EthStatsURLFlag,
-		utils.FakePoWFlag,
 		utils.NoCompactionFlag,
 		utils.GpoBlocksFlag,
 		utils.GpoPercentileFlag,
 		utils.GpoMaxGasPriceFlag,
 		utils.GpoIgnoreGasPriceFlag,
-		utils.MinerNotifyFullFlag,
 		configFileFlag,
 	}, utils.NetworkFlags, utils.DatabasePathFlags)
 
@@ -224,8 +211,6 @@ func init() {
 		attachCommand,
 		javascriptCommand,
 		// See misccmd.go:
-		makecacheCommand,
-		makedagCommand,
 		versionCommand,
 		versionCheckCommand,
 		licenseCommand,
@@ -438,9 +423,7 @@ func startNode(ctx *cli.Context, stack *node.Node, backend ethapi.Backend, isCon
 		// Set the gas price to the limits from the CLI and start mining
 		gasprice := flags.GlobalBig(ctx, utils.MinerGasPriceFlag.Name)
 		ethBackend.TxPool().SetGasPrice(gasprice)
-		// start mining
-		threads := ctx.Int(utils.MinerThreadsFlag.Name)
-		if err := ethBackend.StartMining(threads); err != nil {
+		if err := ethBackend.StartMining(); err != nil {
 			utils.Fatalf("Failed to start mining: %v", err)
 		}
 	}

cmd/geth/misccmd.go

@@ -20,11 +20,8 @@ import (
 	"fmt"
 	"os"
 	"runtime"
-	"strconv"
 	"strings"
 
-	"github.com/ethereum/go-ethereum/cmd/utils"
-	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/internal/version"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/urfave/cli/v2"
@@ -41,30 +38,6 @@ var (
 		Usage: "Version to check",
 		Value: version.ClientName(clientIdentifier),
 	}
-	makecacheCommand = &cli.Command{
-		Action:    makecache,
-		Name:      "makecache",
-		Usage:     "Generate ethash verification cache (for testing)",
-		ArgsUsage: "<blockNum> <outputDir>",
-		Description: `
-The makecache command generates an ethash cache in <outputDir>.
-
-This command exists to support the system testing project.
-Regular users do not need to execute it.
-`,
-	}
-	makedagCommand = &cli.Command{
-		Action:    makedag,
-		Name:      "makedag",
-		Usage:     "Generate ethash mining DAG (for testing)",
-		ArgsUsage: "<blockNum> <outputDir>",
-		Description: `
-The makedag command generates an ethash DAG in <outputDir>.
-
-This command exists to support the system testing project.
-Regular users do not need to execute it.
-`,
-	}
 	versionCommand = &cli.Command{
 		Action:    printVersion,
 		Name:      "version",
@@ -96,36 +69,6 @@ and displays information about any security vulnerabilities that affect the curr
 	}
 )
 
-// makecache generates an ethash verification cache into the provided folder.
-func makecache(ctx *cli.Context) error {
-	args := ctx.Args().Slice()
-	if len(args) != 2 {
-		utils.Fatalf(`Usage: geth makecache <block number> <outputdir>`)
-	}
-	block, err := strconv.ParseUint(args[0], 0, 64)
-	if err != nil {
-		utils.Fatalf("Invalid block number: %v", err)
-	}
-	ethash.MakeCache(block, args[1])
-
-	return nil
-}
-
-// makedag generates an ethash mining DAG into the provided folder.
-func makedag(ctx *cli.Context) error {
-	args := ctx.Args().Slice()
-	if len(args) != 2 {
-		utils.Fatalf(`Usage: geth makedag <block number> <outputdir>`)
-	}
-	block, err := strconv.ParseUint(args[0], 0, 64)
-	if err != nil {
-		utils.Fatalf("Invalid block number: %v", err)
-	}
-	ethash.MakeDataset(block, args[1])
-
-	return nil
-}
-
 func printVersion(ctx *cli.Context) error {
 	git, _ := version.VCS()
 

cmd/utils/flags.go

@@ -39,7 +39,6 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/fdlimit"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/txpool"
@@ -325,54 +324,6 @@ var (
 		Usage:    "Enables serving light clients before syncing",
 		Category: flags.LightCategory,
 	}
-
-	// Ethash settings
-	EthashCacheDirFlag = &flags.DirectoryFlag{
-		Name:     "ethash.cachedir",
-		Usage:    "Directory to store the ethash verification caches (default = inside the datadir)",
-		Category: flags.EthashCategory,
-	}
-	EthashCachesInMemoryFlag = &cli.IntFlag{
-		Name:     "ethash.cachesinmem",
-		Usage:    "Number of recent ethash caches to keep in memory (16MB each)",
-		Value:    ethconfig.Defaults.Ethash.CachesInMem,
-		Category: flags.EthashCategory,
-	}
-	EthashCachesOnDiskFlag = &cli.IntFlag{
-		Name:     "ethash.cachesondisk",
-		Usage:    "Number of recent ethash caches to keep on disk (16MB each)",
-		Value:    ethconfig.Defaults.Ethash.CachesOnDisk,
-		Category: flags.EthashCategory,
-	}
-	EthashCachesLockMmapFlag = &cli.BoolFlag{
-		Name:     "ethash.cacheslockmmap",
-		Usage:    "Lock memory maps of recent ethash caches",
-		Category: flags.EthashCategory,
-	}
-	EthashDatasetDirFlag = &flags.DirectoryFlag{
-		Name:     "ethash.dagdir",
-		Usage:    "Directory to store the ethash mining DAGs",
-		Value:    flags.DirectoryString(ethconfig.Defaults.Ethash.DatasetDir),
-		Category: flags.EthashCategory,
-	}
-	EthashDatasetsInMemoryFlag = &cli.IntFlag{
-		Name:     "ethash.dagsinmem",
-		Usage:    "Number of recent ethash mining DAGs to keep in memory (1+GB each)",
-		Value:    ethconfig.Defaults.Ethash.DatasetsInMem,
-		Category: flags.EthashCategory,
-	}
-	EthashDatasetsOnDiskFlag = &cli.IntFlag{
-		Name:     "ethash.dagsondisk",
-		Usage:    "Number of recent ethash mining DAGs to keep on disk (1+GB each)",
-		Value:    ethconfig.Defaults.Ethash.DatasetsOnDisk,
-		Category: flags.EthashCategory,
-	}
-	EthashDatasetsLockMmapFlag = &cli.BoolFlag{
-		Name:     "ethash.dagslockmmap",
-		Usage:    "Lock memory maps for recent ethash mining DAGs",
-		Category: flags.EthashCategory,
-	}
-
 	// Transaction pool settings
 	TxPoolLocalsFlag = &cli.StringFlag{
 		Name:     "txpool.locals",
@@ -510,22 +461,6 @@ var (
 		Usage:    "Enable mining",
 		Category: flags.MinerCategory,
 	}
-	MinerThreadsFlag = &cli.IntFlag{
-		Name:     "miner.threads",
-		Usage:    "Number of CPU threads to use for mining",
-		Value:    0,
-		Category: flags.MinerCategory,
-	}
-	MinerNotifyFlag = &cli.StringFlag{
-		Name:     "miner.notify",
-		Usage:    "Comma separated HTTP URL list to notify of new work packages",
-		Category: flags.MinerCategory,
-	}
-	MinerNotifyFullFlag = &cli.BoolFlag{
-		Name:     "miner.notify.full",
-		Usage:    "Notify with pending block headers instead of work packages",
-		Category: flags.MinerCategory,
-	}
 	MinerGasLimitFlag = &cli.Uint64Flag{
 		Name:     "miner.gaslimit",
 		Usage:    "Target gas ceiling for mined blocks",
@@ -554,11 +489,6 @@ var (
 		Value:    ethconfig.Defaults.Miner.Recommit,
 		Category: flags.MinerCategory,
 	}
-	MinerNoVerifyFlag = &cli.BoolFlag{
-		Name:     "miner.noverify",
-		Usage:    "Disable remote sealing verification",
-		Category: flags.MinerCategory,
-	}
 	MinerNewPayloadTimeout = &cli.DurationFlag{
 		Name:     "miner.newpayload-timeout",
 		Usage:    "Specify the maximum time allowance for creating a new payload",
@@ -648,11 +578,6 @@ var (
 		Usage:    "Reporting URL of a ethstats service (nodename:secret@host:port)",
 		Category: flags.MetricsCategory,
 	}
-	FakePoWFlag = &cli.BoolFlag{
-		Name:     "fakepow",
-		Usage:    "Disables proof-of-work verification",
-		Category: flags.LoggingCategory,
-	}
 	NoCompactionFlag = &cli.BoolFlag{
 		Name:     "nocompaction",
 		Usage:    "Disables db compaction after import",
@@ -1604,38 +1529,7 @@ func setTxPool(ctx *cli.Context, cfg *txpool.Config) {
 	}
 }
 
-func setEthash(ctx *cli.Context, cfg *ethconfig.Config) {
-	if ctx.IsSet(EthashCacheDirFlag.Name) {
-		cfg.Ethash.CacheDir = ctx.String(EthashCacheDirFlag.Name)
-	}
-	if ctx.IsSet(EthashDatasetDirFlag.Name) {
-		cfg.Ethash.DatasetDir = ctx.String(EthashDatasetDirFlag.Name)
-	}
-	if ctx.IsSet(EthashCachesInMemoryFlag.Name) {
-		cfg.Ethash.CachesInMem = ctx.Int(EthashCachesInMemoryFlag.Name)
-	}
-	if ctx.IsSet(EthashCachesOnDiskFlag.Name) {
-		cfg.Ethash.CachesOnDisk = ctx.Int(EthashCachesOnDiskFlag.Name)
-	}
-	if ctx.IsSet(EthashCachesLockMmapFlag.Name) {
-		cfg.Ethash.CachesLockMmap = ctx.Bool(EthashCachesLockMmapFlag.Name)
-	}
-	if ctx.IsSet(EthashDatasetsInMemoryFlag.Name) {
-		cfg.Ethash.DatasetsInMem = ctx.Int(EthashDatasetsInMemoryFlag.Name)
-	}
-	if ctx.IsSet(EthashDatasetsOnDiskFlag.Name) {
-		cfg.Ethash.DatasetsOnDisk = ctx.Int(EthashDatasetsOnDiskFlag.Name)
-	}
-	if ctx.IsSet(EthashDatasetsLockMmapFlag.Name) {
-		cfg.Ethash.DatasetsLockMmap = ctx.Bool(EthashDatasetsLockMmapFlag.Name)
-	}
-}
-
 func setMiner(ctx *cli.Context, cfg *miner.Config) {
-	if ctx.IsSet(MinerNotifyFlag.Name) {
-		cfg.Notify = strings.Split(ctx.String(MinerNotifyFlag.Name), ",")
-	}
-	cfg.NotifyFull = ctx.Bool(MinerNotifyFullFlag.Name)
 	if ctx.IsSet(MinerExtraDataFlag.Name) {
 		cfg.ExtraData = []byte(ctx.String(MinerExtraDataFlag.Name))
 	}
@@ -1648,9 +1542,6 @@ func setMiner(ctx *cli.Context, cfg *miner.Config) {
 	if ctx.IsSet(MinerRecommitIntervalFlag.Name) {
 		cfg.Recommit = ctx.Duration(MinerRecommitIntervalFlag.Name)
 	}
-	if ctx.IsSet(MinerNoVerifyFlag.Name) {
-		cfg.Noverify = ctx.Bool(MinerNoVerifyFlag.Name)
-	}
 	if ctx.IsSet(MinerNewPayloadTimeout.Name) {
 		cfg.NewPayloadTimeout = ctx.Duration(MinerNewPayloadTimeout.Name)
 	}
@@ -1741,7 +1632,6 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *ethconfig.Config) {
 	setEtherbase(ctx, cfg)
 	setGPO(ctx, &cfg.GPO, ctx.String(SyncModeFlag.Name) == "light")
 	setTxPool(ctx, &cfg.TxPool)
-	setEthash(ctx, cfg)
 	setMiner(ctx, &cfg.Miner)
 	setRequiredBlocks(ctx, cfg)
 	setLes(ctx, cfg)
@@ -2226,15 +2116,14 @@ func MakeChain(ctx *cli.Context, stack *node.Node, readonly bool) (*core.BlockCh
 		gspec   = MakeGenesis(ctx)
 		chainDb = MakeChainDatabase(ctx, stack, readonly)
 	)
-	cliqueConfig, err := core.LoadCliqueConfig(chainDb, gspec)
+	config, err := core.LoadChainConfig(chainDb, gspec)
 	if err != nil {
 		Fatalf("%v", err)
 	}
-	ethashConfig := ethconfig.Defaults.Ethash
-	if ctx.Bool(FakePoWFlag.Name) {
-		ethashConfig.PowMode = ethash.ModeFake
+	engine, err := ethconfig.CreateConsensusEngine(config, chainDb)
+	if err != nil {
+		Fatalf("%v", err)
 	}
-	engine := ethconfig.CreateConsensusEngine(stack, &ethashConfig, cliqueConfig, nil, false, chainDb)
 	if gcmode := ctx.String(GCModeFlag.Name); gcmode != "full" && gcmode != "archive" {
 		Fatalf("--%s must be either 'full' or 'archive'", GCModeFlag.Name)
 	}

consensus/beacon/consensus.go

@@ -78,13 +78,13 @@ func (beacon *Beacon) Author(header *types.Header) (common.Address, error) {
 
 // VerifyHeader checks whether a header conforms to the consensus rules of the
 // stock Ethereum consensus engine.
-func (beacon *Beacon) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
+func (beacon *Beacon) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header) error {
 	reached, err := IsTTDReached(chain, header.ParentHash, header.Number.Uint64()-1)
 	if err != nil {
 		return err
 	}
 	if !reached {
-		return beacon.ethone.VerifyHeader(chain, header, seal)
+		return beacon.ethone.VerifyHeader(chain, header)
 	}
 	// Short circuit if the parent is not known
 	parent := chain.GetHeader(header.ParentHash, header.Number.Uint64()-1)
@@ -149,13 +149,13 @@ func (beacon *Beacon) splitHeaders(chain consensus.ChainHeaderReader, headers []
 // concurrently. The method returns a quit channel to abort the operations and
 // a results channel to retrieve the async verifications.
 // VerifyHeaders expect the headers to be ordered and continuous.
-func (beacon *Beacon) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
+func (beacon *Beacon) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header) (chan<- struct{}, <-chan error) {
 	preHeaders, postHeaders, err := beacon.splitHeaders(chain, headers)
 	if err != nil {
 		return make(chan struct{}), errOut(len(headers), err)
 	}
 	if len(postHeaders) == 0 {
-		return beacon.ethone.VerifyHeaders(chain, headers, seals)
+		return beacon.ethone.VerifyHeaders(chain, headers)
 	}
 	if len(preHeaders) == 0 {
 		return beacon.verifyHeaders(chain, headers, nil)
@@ -171,7 +171,7 @@ func (beacon *Beacon) VerifyHeaders(chain consensus.ChainHeaderReader, headers [
 			old, new, out      = 0, len(preHeaders), 0
 			errors             = make([]error, len(headers))
 			done               = make([]bool, len(headers))
-			oldDone, oldResult = beacon.ethone.VerifyHeaders(chain, preHeaders, seals[:len(preHeaders)])
+			oldDone, oldResult = beacon.ethone.VerifyHeaders(chain, preHeaders)
 			newDone, newResult = beacon.verifyHeaders(chain, postHeaders, preHeaders[len(preHeaders)-1])
 		)
 		// Collect the results

consensus/clique/clique.go

@@ -214,14 +214,14 @@ func (c *Clique) Author(header *types.Header) (common.Address, error) {
 }
 
 // VerifyHeader checks whether a header conforms to the consensus rules.
-func (c *Clique) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
+func (c *Clique) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header) error {
 	return c.verifyHeader(chain, header, nil)
 }
 
 // VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers. The
 // method returns a quit channel to abort the operations and a results channel to
 // retrieve the async verifications (the order is that of the input slice).
-func (c *Clique) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
+func (c *Clique) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header) (chan<- struct{}, <-chan error) {
 	abort := make(chan struct{})
 	results := make(chan error, len(headers))
 

consensus/consensus.go

@@ -66,15 +66,14 @@ type Engine interface {
 	Author(header *types.Header) (common.Address, error)
 
 	// VerifyHeader checks whether a header conforms to the consensus rules of a
-	// given engine. Verifying the seal may be done optionally here, or explicitly
-	// via the VerifySeal method.
-	VerifyHeader(chain ChainHeaderReader, header *types.Header, seal bool) error
+	// given engine.
+	VerifyHeader(chain ChainHeaderReader, header *types.Header) error
 
 	// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
 	// concurrently. The method returns a quit channel to abort the operations and
 	// a results channel to retrieve the async verifications (the order is that of
 	// the input slice).
-	VerifyHeaders(chain ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)
+	VerifyHeaders(chain ChainHeaderReader, headers []*types.Header) (chan<- struct{}, <-chan error)
 
 	// VerifyUncles verifies that the given block's uncles conform to the consensus
 	// rules of a given engine.

consensus/ethash/api.go

-// Copyright 2018 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package ethash
-
-import (
-	"errors"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/ethereum/go-ethereum/core/types"
-)
-
-var errEthashStopped = errors.New("ethash stopped")
-
-// API exposes ethash related methods for the RPC interface.
-type API struct {
-	ethash *Ethash
-}
-
-// 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
-//	result[3] - hex encoded block number
-func (api *API) GetWork() ([4]string, error) {
-	if api.ethash.remote == nil {
-		return [4]string{}, errors.New("not supported")
-	}
-
-	var (
-		workCh = make(chan [4]string, 1)
-		errc   = make(chan error, 1)
-	)
-	select {
-	case api.ethash.remote.fetchWorkCh <- &sealWork{errc: errc, res: workCh}:
-	case <-api.ethash.remote.exitCh:
-		return [4]string{}, errEthashStopped
-	}
-	select {
-	case work := <-workCh:
-		return work, nil
-	case err := <-errc:
-		return [4]string{}, err
-	}
-}
-
-// SubmitWork can be used by external miner to submit their POW solution.
-// It returns an indication if the work was accepted.
-// Note either an invalid solution, a stale work a non-existent work will return false.
-func (api *API) SubmitWork(nonce types.BlockNonce, hash, digest common.Hash) bool {
-	if api.ethash.remote == nil {
-		return false
-	}
-
-	var errc = make(chan error, 1)
-	select {
-	case api.ethash.remote.submitWorkCh <- &mineResult{
-		nonce:     nonce,
-		mixDigest: digest,
-		hash:      hash,
-		errc:      errc,
-	}:
-	case <-api.ethash.remote.exitCh:
-		return false
-	}
-	err := <-errc
-	return err == nil
-}
-
-// 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 (api *API) SubmitHashrate(rate hexutil.Uint64, id common.Hash) bool {
-	if api.ethash.remote == nil {
-		return false
-	}
-
-	var done = make(chan struct{}, 1)
-	select {
-	case api.ethash.remote.submitRateCh <- &hashrate{done: done, rate: uint64(rate), id: id}:
-	case <-api.ethash.remote.exitCh:
-		return false
-	}
-
-	// Block until hash rate submitted successfully.
-	<-done
-	return true
-}
-
-// GetHashrate returns the current hashrate for local CPU miner and remote miner.
-func (api *API) GetHashrate() uint64 {
-	return uint64(api.ethash.Hashrate())
-}

consensus/ethash/consensus.go

@@ -17,11 +17,9 @@
 package ethash
 
 import (
-	"bytes"
 	"errors"
 	"fmt"
 	"math/big"
-	"runtime"
 	"time"
 
 	mapset "github.com/deckarep/golang-set/v2"
@@ -89,9 +87,6 @@ var (
 	errDuplicateUncle  = errors.New("duplicate uncle")
 	errUncleIsAncestor = errors.New("uncle is ancestor")
 	errDanglingUncle   = errors.New("uncle's parent is not ancestor")
-	errInvalidDifficulty = errors.New("non-positive difficulty")
-	errInvalidMixDigest  = errors.New("invalid mix digest")
-	errInvalidPoW        = errors.New("invalid proof-of-work")
 )
 
 // Author implements consensus.Engine, returning the header's coinbase as the
@@ -102,11 +97,7 @@ func (ethash *Ethash) Author(header *types.Header) (common.Address, error) {
 
 // VerifyHeader checks whether a header conforms to the consensus rules of the
 // stock Ethereum ethash engine.
-func (ethash *Ethash) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error {
-	// If we're running a full engine faking, accept any input as valid
-	if ethash.config.PowMode == ModeFullFake {
-		return nil
-	}
+func (ethash *Ethash) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header) error {
 	// Short circuit if the header is known, or its parent not
 	number := header.Number.Uint64()
 	if chain.GetHeader(header.Hash(), number) != nil {
@@ -117,93 +108,54 @@ func (ethash *Ethash) VerifyHeader(chain consensus.ChainHeaderReader, header *ty
 		return consensus.ErrUnknownAncestor
 	}
 	// Sanity checks passed, do a proper verification
-	return ethash.verifyHeader(chain, header, parent, false, seal, time.Now().Unix())
+	return ethash.verifyHeader(chain, header, parent, false, time.Now().Unix())
 }
 
 // VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
 // concurrently. The method returns a quit channel to abort the operations and
 // a results channel to retrieve the async verifications.
-func (ethash *Ethash) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
+func (ethash *Ethash) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header) (chan<- struct{}, <-chan error) {
 	// If we're running a full engine faking, accept any input as valid
-	if ethash.config.PowMode == ModeFullFake || len(headers) == 0 {
+	if ethash.fakeFull || len(headers) == 0 {
 		abort, results := make(chan struct{}), make(chan error, len(headers))
 		for i := 0; i < len(headers); i++ {
 			results <- nil
 		}
 		return abort, results
 	}
+	abort := make(chan struct{})
+	results := make(chan error, len(headers))
+	unixNow := time.Now().Unix()
 
-	// Spawn as many workers as allowed threads
-	workers := runtime.GOMAXPROCS(0)
-	if len(headers) < workers {
-		workers = len(headers)
-	}
-
-	// Create a task channel and spawn the verifiers
-	var (
-		inputs  = make(chan int)
-		done    = make(chan int, workers)
-		errors  = make([]error, len(headers))
-		abort   = make(chan struct{})
-		unixNow = time.Now().Unix()
-	)
-	for i := 0; i < workers; i++ {
 	go func() {
-			for index := range inputs {
-				errors[index] = ethash.verifyHeaderWorker(chain, headers, seals, index, unixNow)
-				done <- index
+		for i, header := range headers {
+			var parent *types.Header
+			if i == 0 {
+				parent = chain.GetHeader(headers[0].ParentHash, headers[0].Number.Uint64()-1)
+			} else if headers[i-1].Hash() == headers[i].ParentHash {
+				parent = headers[i-1]
 			}
-		}()
+			var err error
+			if parent == nil {
+				err = consensus.ErrUnknownAncestor
+			} else {
+				err = ethash.verifyHeader(chain, header, parent, false, unixNow)
 			}
-
-	errorsOut := make(chan error, len(headers))
-	go func() {
-		defer close(inputs)
-		var (
-			in, out = 0, 0
-			checked = make([]bool, len(headers))
-			inputs  = inputs
-		)
-		for {
 			select {
-			case inputs <- in:
-				if in++; in == len(headers) {
-					// Reached end of headers. Stop sending to workers.
-					inputs = nil
-				}
-			case index := <-done:
-				for checked[index] = true; checked[out]; out++ {
-					errorsOut <- errors[out]
-					if out == len(headers)-1 {
-						return
-					}
-				}
 			case <-abort:
 				return
+			case results <- err:
 			}
 		}
 	}()
-	return abort, errorsOut
-}
-
-func (ethash *Ethash) verifyHeaderWorker(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool, index int, unixNow int64) error {
-	var parent *types.Header
-	if index == 0 {
-		parent = chain.GetHeader(headers[0].ParentHash, headers[0].Number.Uint64()-1)
-	} else if headers[index-1].Hash() == headers[index].ParentHash {
-		parent = headers[index-1]
-	}
-	if parent == nil {
-		return consensus.ErrUnknownAncestor
-	}
-	return ethash.verifyHeader(chain, headers[index], parent, false, seals[index], unixNow)
+	return abort, results
 }
 
 // VerifyUncles verifies that the given block's uncles conform to the consensus
 // rules of the stock Ethereum ethash engine.
 func (ethash *Ethash) VerifyUncles(chain consensus.ChainReader, block *types.Block) error {
 	// If we're running a full engine faking, accept any input as valid
-	if ethash.config.PowMode == ModeFullFake {
+	if ethash.fakeFull {
 		return nil
 	}
 	// Verify that there are at most 2 uncles included in this block
@@ -255,7 +207,7 @@ func (ethash *Ethash) VerifyUncles(chain consensus.ChainReader, block *types.Blo
 		if ancestors[uncle.ParentHash] == nil || uncle.ParentHash == block.ParentHash() {
 			return errDanglingUncle
 		}
-		if err := ethash.verifyHeader(chain, uncle, ancestors[uncle.ParentHash], true, true, time.Now().Unix()); err != nil {
+		if err := ethash.verifyHeader(chain, uncle, ancestors[uncle.ParentHash], true, time.Now().Unix()); err != nil {
 			return err
 		}
 	}
@@ -265,7 +217,7 @@ func (ethash *Ethash) VerifyUncles(chain consensus.ChainReader, block *types.Blo
 // verifyHeader checks whether a header conforms to the consensus rules of the
 // stock Ethereum ethash engine.
 // See YP section 4.3.4. "Block Header Validity"
-func (ethash *Ethash) verifyHeader(chain consensus.ChainHeaderReader, header, parent *types.Header, uncle bool, seal bool, unixNow int64) error {
+func (ethash *Ethash) verifyHeader(chain consensus.ChainHeaderReader, header, parent *types.Header, uncle bool, unixNow int64) error {
 	// Ensure that the header's extra-data section is of a reasonable size
 	if uint64(len(header.Extra)) > params.MaximumExtraDataSize {
 		return fmt.Errorf("extra-data too long: %d > %d", len(header.Extra), params.MaximumExtraDataSize)
@@ -316,11 +268,12 @@ func (ethash *Ethash) verifyHeader(chain consensus.ChainHeaderReader, header, pa
 	if chain.Config().IsCancun(header.Time) {
 		return fmt.Errorf("ethash does not support cancun fork")
 	}
-	// Verify the engine specific seal securing the block
-	if seal {
-		if err := ethash.verifySeal(chain, header, false); err != nil {
-			return err
+	// Add some fake checks for tests
+	if ethash.fakeDelay != nil {
+		time.Sleep(*ethash.fakeDelay)
 	}
+	if ethash.fakeFail != nil && *ethash.fakeFail == header.Number.Uint64() {
+		return errors.New("invalid tester pow")
 	}
 	// If all checks passed, validate any special fields for hard forks
 	if err := misc.VerifyDAOHeaderExtraData(chain.Config(), header); err != nil {
@@ -521,72 +474,6 @@ var FrontierDifficultyCalculator = calcDifficultyFrontier
 var HomesteadDifficultyCalculator = calcDifficultyHomestead
 var DynamicDifficultyCalculator = makeDifficultyCalculator
 
-// verifySeal checks whether a block satisfies the PoW difficulty requirements,
-// either using the usual ethash cache for it, or alternatively using a full DAG
-// to make remote mining fast.
-func (ethash *Ethash) verifySeal(chain consensus.ChainHeaderReader, header *types.Header, fulldag bool) error {
-	// If we're running a fake PoW, accept any seal as valid
-	if ethash.config.PowMode == ModeFake || ethash.config.PowMode == ModeFullFake {
-		time.Sleep(ethash.fakeDelay)
-		if ethash.fakeFail == header.Number.Uint64() {
-			return errInvalidPoW
-		}
-		return nil
-	}
-	// If we're running a shared PoW, delegate verification to it
-	if ethash.shared != nil {
-		return ethash.shared.verifySeal(chain, header, fulldag)
-	}
-	// Ensure that we have a valid difficulty for the block
-	if header.Difficulty.Sign() <= 0 {
-		return errInvalidDifficulty
-	}
-	// Recompute the digest and PoW values
-	number := header.Number.Uint64()
-
-	var (
-		digest []byte
-		result []byte
-	)
-	// If fast-but-heavy PoW verification was requested, use an ethash dataset
-	if fulldag {
-		dataset := ethash.dataset(number, true)
-		if dataset.generated() {
-			digest, result = hashimotoFull(dataset.dataset, ethash.SealHash(header).Bytes(), header.Nonce.Uint64())
-
-			// Datasets are unmapped in a finalizer. Ensure that the dataset stays alive
-			// until after the call to hashimotoFull so it's not unmapped while being used.
-			runtime.KeepAlive(dataset)
-		} else {
-			// Dataset not yet generated, don't hang, use a cache instead
-			fulldag = false
-		}
-	}
-	// If slow-but-light PoW verification was requested (or DAG not yet ready), use an ethash cache
-	if !fulldag {
-		cache := ethash.cache(number)
-
-		size := datasetSize(number)
-		if ethash.config.PowMode == ModeTest {
-			size = 32 * 1024
-		}
-		digest, result = hashimotoLight(size, cache.cache, ethash.SealHash(header).Bytes(), header.Nonce.Uint64())
-
-		// Caches are unmapped in a finalizer. Ensure that the cache stays alive
-		// until after the call to hashimotoLight so it's not unmapped while being used.
-		runtime.KeepAlive(cache)
-	}
-	// Verify the calculated values against the ones provided in the header
-	if !bytes.Equal(header.MixDigest[:], digest) {
-		return errInvalidMixDigest
-	}
-	target := new(big.Int).Div(two256, header.Difficulty)
-	if new(big.Int).SetBytes(result).Cmp(target) > 0 {
-		return errInvalidPoW
-	}
-	return nil
-}
-
 // Prepare implements consensus.Engine, initializing the difficulty field of a
 // header to conform to the ethash protocol. The changes are done inline.
 func (ethash *Ethash) Prepare(chain consensus.ChainHeaderReader, header *types.Header) error {

consensus/ethash/ethash_test.go

-// Copyright 2017 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package ethash
-
-import (
-	"math/big"
-	"math/rand"
-	"os"
-	"sync"
-	"testing"
-	"time"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/ethereum/go-ethereum/core/types"
-)
-
-// Tests that ethash works correctly in test mode.
-func TestTestMode(t *testing.T) {
-	header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
-
-	ethash := NewTester(nil, false)
-	defer ethash.Close()
-
-	results := make(chan *types.Block)
-	err := ethash.Seal(nil, types.NewBlockWithHeader(header), results, nil)
-	if err != nil {
-		t.Fatalf("failed to seal block: %v", err)
-	}
-	select {
-	case block := <-results:
-		header.Nonce = types.EncodeNonce(block.Nonce())
-		header.MixDigest = block.MixDigest()
-		if err := ethash.verifySeal(nil, header, false); err != nil {
-			t.Fatalf("unexpected verification error: %v", err)
-		}
-	case <-time.NewTimer(4 * time.Second).C:
-		t.Error("sealing result timeout")
-	}
-}
-
-// This test checks that cache lru logic doesn't crash under load.
-// It reproduces https://github.com/ethereum/go-ethereum/issues/14943
-func TestCacheFileEvict(t *testing.T) {
-	// TODO: t.TempDir fails to remove the directory on Windows
-	// \AppData\Local\Temp\1\TestCacheFileEvict2179435125\001\cache-R23-0000000000000000: Access is denied.
-	tmpdir, err := os.MkdirTemp("", "ethash-test")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.RemoveAll(tmpdir)
-
-	config := Config{
-		CachesInMem:  3,
-		CachesOnDisk: 10,
-		CacheDir:     tmpdir,
-		PowMode:      ModeTest,
-	}
-	e := New(config, nil, false)
-	defer e.Close()
-
-	workers := 8
-	epochs := 100
-	var wg sync.WaitGroup
-	wg.Add(workers)
-	for i := 0; i < workers; i++ {
-		go verifyTest(&wg, e, i, epochs)
-	}
-	wg.Wait()
-}
-
-func verifyTest(wg *sync.WaitGroup, e *Ethash, workerIndex, epochs int) {
-	defer wg.Done()
-
-	const wiggle = 4 * epochLength
-	r := rand.New(rand.NewSource(int64(workerIndex)))
-	for epoch := 0; epoch < epochs; epoch++ {
-		block := int64(epoch)*epochLength - wiggle/2 + r.Int63n(wiggle)
-		if block < 0 {
-			block = 0
-		}
-		header := &types.Header{Number: big.NewInt(block), Difficulty: big.NewInt(100)}
-		e.verifySeal(nil, header, false)
-	}
-}
-
-func TestRemoteSealer(t *testing.T) {
-	ethash := NewTester(nil, false)
-	defer ethash.Close()
-
-	api := &API{ethash}
-	if _, err := api.GetWork(); err != errNoMiningWork {
-		t.Error("expect to return an error indicate there is no mining work")
-	}
-	header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
-	block := types.NewBlockWithHeader(header)
-	sealhash := ethash.SealHash(header)
-
-	// Push new work.
-	results := make(chan *types.Block)
-	ethash.Seal(nil, block, results, nil)
-
-	var (
-		work [4]string
-		err  error
-	)
-	if work, err = api.GetWork(); err != nil || work[0] != sealhash.Hex() {
-		t.Error("expect to return a mining work has same hash")
-	}
-
-	if res := api.SubmitWork(types.BlockNonce{}, sealhash, common.Hash{}); res {
-		t.Error("expect to return false when submit a fake solution")
-	}
-	// Push new block with same block number to replace the original one.
-	header = &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(1000)}
-	block = types.NewBlockWithHeader(header)
-	sealhash = ethash.SealHash(header)
-	ethash.Seal(nil, block, results, nil)
-
-	if work, err = api.GetWork(); err != nil || work[0] != sealhash.Hex() {
-		t.Error("expect to return the latest pushed work")
-	}
-}
-
-func TestHashrate(t *testing.T) {
-	var (
-		hashrate = []hexutil.Uint64{100, 200, 300}
-		expect   uint64
-		ids      = []common.Hash{common.HexToHash("a"), common.HexToHash("b"), common.HexToHash("c")}
-	)
-	ethash := NewTester(nil, false)
-	defer ethash.Close()
-
-	if tot := ethash.Hashrate(); tot != 0 {
-		t.Error("expect the result should be zero")
-	}
-
-	api := &API{ethash}
-	for i := 0; i < len(hashrate); i += 1 {
-		if res := api.SubmitHashrate(hashrate[i], ids[i]); !res {
-			t.Error("remote miner submit hashrate failed")
-		}
-		expect += uint64(hashrate[i])
-	}
-	if tot := ethash.Hashrate(); tot != float64(expect) {
-		t.Error("expect total hashrate should be same")
-	}
-}
-
-func TestClosedRemoteSealer(t *testing.T) {
-	ethash := NewTester(nil, false)
-	time.Sleep(1 * time.Second) // ensure exit channel is listening
-	ethash.Close()
-
-	api := &API{ethash}
-	if _, err := api.GetWork(); err != errEthashStopped {
-		t.Error("expect to return an error to indicate ethash is stopped")
-	}
-
-	if res := api.SubmitHashrate(hexutil.Uint64(100), common.HexToHash("a")); res {
-		t.Error("expect to return false when submit hashrate to a stopped ethash")
-	}
-}

consensus/ethash/mmap_help_linux.go

-// Copyright 2021 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-//go:build linux
-// +build linux
-
-package ethash
-
-import (
-	"os"
-
-	"golang.org/x/sys/unix"
-)
-
-// ensureSize expands the file to the given size. This is to prevent runtime
-// errors later on, if the underlying file expands beyond the disk capacity,
-// even though it ostensibly is already expanded, but due to being sparse
-// does not actually occupy the full declared size on disk.
-func ensureSize(f *os.File, size int64) error {
-	// Docs: https://www.man7.org/linux/man-pages/man2/fallocate.2.html
-	return unix.Fallocate(int(f.Fd()), 0, 0, size)
-}

consensus/ethash/mmap_help_other.go

-// Copyright 2021 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library 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 Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-//go:build !linux
-// +build !linux
-
-package ethash
-
-import (
-	"os"
-)
-
-// ensureSize expands the file to the given size. This is to prevent runtime
-// errors later on, if the underlying file expands beyond the disk capacity,
-// even though it ostensibly is already expanded, but due to being sparse
-// does not actually occupy the full declared size on disk.
-func ensureSize(f *os.File, size int64) error {
-	// On systems which do not support fallocate, we merely truncate it.
-	// More robust alternatives  would be to
-	// - Use posix_fallocate, or
-	// - explicitly fill the file with zeroes.
-	return f.Truncate(size)
-}

console/console_test.go

@@ -26,7 +26,6 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/eth"
@@ -99,9 +98,6 @@ func newTester(t *testing.T, confOverride func(*ethconfig.Config)) *tester {
 		Miner: miner.Config{
 			Etherbase: common.HexToAddress(testAddress),
 		},
-		Ethash: ethash.Config{
-			PowMode: ethash.ModeTest,
-		},
 	}
 	if confOverride != nil {
 		confOverride(ethConf)

core/block_validator_test.go

@@ -55,10 +55,10 @@ func TestHeaderVerification(t *testing.T) {
 
 			if valid {
 				engine := ethash.NewFaker()
-				_, results = engine.VerifyHeaders(chain, []*types.Header{headers[i]}, []bool{true})
+				_, results = engine.VerifyHeaders(chain, []*types.Header{headers[i]})
 			} else {
 				engine := ethash.NewFakeFailer(headers[i].Number.Uint64())
-				_, results = engine.VerifyHeaders(chain, []*types.Header{headers[i]}, []bool{true})
+				_, results = engine.VerifyHeaders(chain, []*types.Header{headers[i]})
 			}
 			// Wait for the verification result
 			select {
@@ -164,7 +164,7 @@ func testHeaderVerificationForMerging(t *testing.T, isClique bool) {
 
 	// Verify the blocks before the merging
 	for i := 0; i < len(preBlocks); i++ {
-		_, results := engine.VerifyHeaders(chain, []*types.Header{preHeaders[i]}, []bool{true})
+		_, results := engine.VerifyHeaders(chain, []*types.Header{preHeaders[i]})
 		// Wait for the verification result
 		select {
 		case result := <-results:
@@ -189,7 +189,7 @@ func testHeaderVerificationForMerging(t *testing.T, isClique bool) {
 
 	// Verify the blocks after the merging
 	for i := 0; i < len(postBlocks); i++ {
-		_, results := engine.VerifyHeaders(chain, []*types.Header{postHeaders[i]}, []bool{true})
+		_, results := engine.VerifyHeaders(chain, []*types.Header{postHeaders[i]})
 		// Wait for the verification result
 		select {
 		case result := <-results:
@@ -209,19 +209,14 @@ func testHeaderVerificationForMerging(t *testing.T, isClique bool) {
 	}
 
 	// Verify the blocks with pre-merge blocks and post-merge blocks
-	var (
-		headers []*types.Header
-		seals   []bool
-	)
+	var headers []*types.Header
 	for _, block := range preBlocks {
 		headers = append(headers, block.Header())
-		seals = append(seals, true)
 	}
 	for _, block := range postBlocks {
 		headers = append(headers, block.Header())
-		seals = append(seals, true)
 	}
-	_, results := engine.VerifyHeaders(chain, headers, seals)
+	_, results := engine.VerifyHeaders(chain, headers)
 	for i := 0; i < len(headers); i++ {
 		select {
 		case result := <-results:
@@ -252,11 +247,8 @@ func testHeaderConcurrentVerification(t *testing.T, threads int) {
 		_, blocks, _ = GenerateChainWithGenesis(gspec, ethash.NewFaker(), 8, nil)
 	)
 	headers := make([]*types.Header, len(blocks))
-	seals := make([]bool, len(blocks))
-
 	for i, block := range blocks {
 		headers[i] = block.Header()
-		seals[i] = true
 	}
 	// Set the number of threads to verify on
 	old := runtime.GOMAXPROCS(threads)
@@ -269,11 +261,11 @@ func testHeaderConcurrentVerification(t *testing.T, threads int) {
 
 		if valid {
 			chain, _ := NewBlockChain(rawdb.NewMemoryDatabase(), nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
-			_, results = chain.engine.VerifyHeaders(chain, headers, seals)
+			_, results = chain.engine.VerifyHeaders(chain, headers)
 			chain.Stop()
 		} else {
 			chain, _ := NewBlockChain(rawdb.NewMemoryDatabase(), nil, gspec, nil, ethash.NewFakeFailer(uint64(len(headers)-1)), vm.Config{}, nil, nil)
-			_, results = chain.engine.VerifyHeaders(chain, headers, seals)
+			_, results = chain.engine.VerifyHeaders(chain, headers)
 			chain.Stop()
 		}
 		// Wait for all the verification results
@@ -322,11 +314,8 @@ func testHeaderConcurrentAbortion(t *testing.T, threads int) {
 		_, blocks, _ = GenerateChainWithGenesis(gspec, ethash.NewFaker(), 1024, nil)
 	)
 	headers := make([]*types.Header, len(blocks))
-	seals := make([]bool, len(blocks))
-
 	for i, block := range blocks {
 		headers[i] = block.Header()
-		seals[i] = true
 	}
 	// Set the number of threads to verify on
 	old := runtime.GOMAXPROCS(threads)
@@ -336,7 +325,7 @@ func testHeaderConcurrentAbortion(t *testing.T, threads int) {
 	chain, _ := NewBlockChain(rawdb.NewMemoryDatabase(), nil, gspec, nil, ethash.NewFakeDelayer(time.Millisecond), vm.Config{}, nil, nil)
 	defer chain.Stop()
 
-	abort, results := chain.engine.VerifyHeaders(chain, headers, seals)
+	abort, results := chain.engine.VerifyHeaders(chain, headers)
 	close(abort)
 
 	// Deplete the results channel

core/blockchain.go

@@ -365,7 +365,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 	// The first thing the node will do is reconstruct the verification data for
 	// the head block (ethash cache or clique voting snapshot). Might as well do
 	// it in advance.
-	bc.engine.VerifyHeader(bc, bc.CurrentHeader(), true)
+	bc.engine.VerifyHeader(bc, bc.CurrentHeader())
 
 	// Check the current state of the block hashes and make sure that we do not have any of the bad blocks in our chain
 	for hash := range BadHashes {
@@ -1522,7 +1522,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
 		return 0, errChainStopped
 	}
 	defer bc.chainmu.Unlock()
-	return bc.insertChain(chain, true, true)
+	return bc.insertChain(chain, true)
 }
 
 // insertChain is the internal implementation of InsertChain, which assumes that
@@ -1533,7 +1533,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
 // racey behaviour. If a sidechain import is in progress, and the historic state
 // is imported, but then new canon-head is added before the actual sidechain
 // completes, then the historic state could be pruned again
-func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals, setHead bool) (int, error) {
+func (bc *BlockChain) insertChain(chain types.Blocks, setHead bool) (int, error) {
 	// If the chain is terminating, don't even bother starting up.
 	if bc.insertStopped() {
 		return 0, nil
@@ -1554,13 +1554,10 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals, setHead bool)
 	}()
 	// Start the parallel header verifier
 	headers := make([]*types.Header, len(chain))
-	seals := make([]bool, len(chain))
-
 	for i, block := range chain {
 		headers[i] = block.Header()
-		seals[i] = verifySeals
 	}
-	abort, results := bc.engine.VerifyHeaders(bc, headers, seals)
+	abort, results := bc.engine.VerifyHeaders(bc, headers)
 	defer close(abort)
 
 	// Peek the error for the first block to decide the directing import logic
@@ -1981,7 +1978,7 @@ func (bc *BlockChain) insertSideChain(block *types.Block, it *insertIterator) (i
 		// memory here.
 		if len(blocks) >= 2048 || memory > 64*1024*1024 {
 			log.Info("Importing heavy sidechain segment", "blocks", len(blocks), "start", blocks[0].NumberU64(), "end", block.NumberU64())
-			if _, err := bc.insertChain(blocks, false, true); err != nil {
+			if _, err := bc.insertChain(blocks, true); err != nil {
 				return 0, err
 			}
 			blocks, memory = blocks[:0], 0
@@ -1995,7 +1992,7 @@ func (bc *BlockChain) insertSideChain(block *types.Block, it *insertIterator) (i
 	}
 	if len(blocks) > 0 {
 		log.Info("Importing sidechain segment", "start", blocks[0].NumberU64(), "end", blocks[len(blocks)-1].NumberU64())
-		return bc.insertChain(blocks, false, true)
+		return bc.insertChain(blocks, true)
 	}
 	return 0, nil
 }
@@ -2038,7 +2035,7 @@ func (bc *BlockChain) recoverAncestors(block *types.Block) (common.Hash, error)
 		} else {
 			b = bc.GetBlock(hashes[i], numbers[i])
 		}
-		if _, err := bc.insertChain(types.Blocks{b}, false, false); err != nil {
+		if _, err := bc.insertChain(types.Blocks{b}, false); err != nil {
 			return b.ParentHash(), err
 		}
 	}
@@ -2242,7 +2239,7 @@ func (bc *BlockChain) InsertBlockWithoutSetHead(block *types.Block) error {
 	}
 	defer bc.chainmu.Unlock()
 
-	_, err := bc.insertChain(types.Blocks{block}, true, false)
+	_, err := bc.insertChain(types.Blocks{block}, false)
 	return err
 }
 
@@ -2462,17 +2459,12 @@ Receipts: %v
 // InsertHeaderChain attempts to insert the given header chain in to the local
 // chain, possibly creating a reorg. If an error is returned, it will return the
 // index number of the failing header as well an error describing what went wrong.
-//
-// The verify parameter can be used to fine tune whether nonce verification
-// should be done or not. The reason behind the optional check is because some
-// of the header retrieval mechanisms already need to verify nonces, as well as
-// because nonces can be verified sparsely, not needing to check each.
-func (bc *BlockChain) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
+func (bc *BlockChain) InsertHeaderChain(chain []*types.Header) (int, error) {
 	if len(chain) == 0 {
 		return 0, nil
 	}
 	start := time.Now()
-	if i, err := bc.hc.ValidateHeaderChain(chain, checkFreq); err != nil {
+	if i, err := bc.hc.ValidateHeaderChain(chain); err != nil {
 		return i, err
 	}
 

core/blockchain_test.go

@@ -74,7 +74,7 @@ func newCanonical(engine consensus.Engine, n int, full bool) (ethdb.Database, *G
 	}
 	// Header-only chain requested
 	genDb, headers := makeHeaderChainWithGenesis(genesis, n, engine, canonicalSeed)
-	_, err := blockchain.InsertHeaderChain(headers, 1)
+	_, err := blockchain.InsertHeaderChain(headers)
 	return genDb, genesis, blockchain, err
 }
 
@@ -115,7 +115,7 @@ func testFork(t *testing.T, blockchain *BlockChain, i, n int, full bool, compara
 		}
 	} else {
 		headerChainB = makeHeaderChain(blockchain2.chainConfig, blockchain2.CurrentHeader(), n, ethash.NewFaker(), genDb, forkSeed)
-		if _, err := blockchain2.InsertHeaderChain(headerChainB, 1); err != nil {
+		if _, err := blockchain2.InsertHeaderChain(headerChainB); err != nil {
 			t.Fatalf("failed to insert forking chain: %v", err)
 		}
 	}
@@ -148,7 +148,7 @@ func testFork(t *testing.T, blockchain *BlockChain, i, n int, full bool, compara
 func testBlockChainImport(chain types.Blocks, blockchain *BlockChain) error {
 	for _, block := range chain {
 		// Try and process the block
-		err := blockchain.engine.VerifyHeader(blockchain, block.Header(), true)
+		err := blockchain.engine.VerifyHeader(blockchain, block.Header())
 		if err == nil {
 			err = blockchain.validator.ValidateBody(block)
 		}
@@ -187,7 +187,7 @@ func testBlockChainImport(chain types.Blocks, blockchain *BlockChain) error {
 func testHeaderChainImport(chain []*types.Header, blockchain *BlockChain) error {
 	for _, header := range chain {
 		// Try and validate the header
-		if err := blockchain.engine.VerifyHeader(blockchain, header, false); err != nil {
+		if err := blockchain.engine.VerifyHeader(blockchain, header); err != nil {
 			return err
 		}
 		// Manually insert the header into the database, but don't reorganise (allows subsequent testing)
@@ -252,7 +252,7 @@ func testInsertAfterMerge(t *testing.T, blockchain *BlockChain, i, n int, full b
 		}
 	} else {
 		headerChainB := makeHeaderChain(blockchain2.chainConfig, blockchain2.CurrentHeader(), n, ethash.NewFaker(), genDb, forkSeed)
-		if _, err := blockchain2.InsertHeaderChain(headerChainB, 1); err != nil {
+		if _, err := blockchain2.InsertHeaderChain(headerChainB); err != nil {
 			t.Fatalf("failed to insert forking chain: %v", err)
 		}
 		if blockchain2.CurrentHeader().Number.Uint64() != headerChainB[len(headerChainB)-1].Number.Uint64() {
@@ -549,10 +549,10 @@ func testReorg(t *testing.T, first, second []int64, td int64, full bool) {
 		for i, block := range diffBlocks {
 			diffHeaders[i] = block.Header()
 		}
-		if _, err := blockchain.InsertHeaderChain(easyHeaders, 1); err != nil {
+		if _, err := blockchain.InsertHeaderChain(easyHeaders); err != nil {
 			t.Fatalf("failed to insert easy chain: %v", err)
 		}
-		if _, err := blockchain.InsertHeaderChain(diffHeaders, 1); err != nil {
+		if _, err := blockchain.InsertHeaderChain(diffHeaders); err != nil {
 			t.Fatalf("failed to insert difficult chain: %v", err)
 		}
 	}
@@ -613,7 +613,7 @@ func testBadHashes(t *testing.T, full bool) {
 		BadHashes[headers[2].Hash()] = true
 		defer func() { delete(BadHashes, headers[2].Hash()) }()
 
-		_, err = blockchain.InsertHeaderChain(headers, 1)
+		_, err = blockchain.InsertHeaderChain(headers)
 	}
 	if !errors.Is(err, ErrBannedHash) {
 		t.Errorf("error mismatch: have: %v, want: %v", err, ErrBannedHash)
@@ -645,7 +645,7 @@ func testReorgBadHashes(t *testing.T, full bool) {
 		BadHashes[blocks[3].Header().Hash()] = true
 		defer func() { delete(BadHashes, blocks[3].Header().Hash()) }()
 	} else {
-		if _, err = blockchain.InsertHeaderChain(headers, 1); err != nil {
+		if _, err = blockchain.InsertHeaderChain(headers); err != nil {
 			t.Errorf("failed to import headers: %v", err)
 		}
 		if blockchain.CurrentHeader().Hash() != headers[3].Hash() {
@@ -711,7 +711,7 @@ func testInsertNonceError(t *testing.T, full bool) {
 
 			blockchain.engine = ethash.NewFakeFailer(failNum)
 			blockchain.hc.engine = blockchain.engine
-			failRes, err = blockchain.InsertHeaderChain(headers, 1)
+			failRes, err = blockchain.InsertHeaderChain(headers)
 		}
 		// Check that the returned error indicates the failure
 		if failRes != failAt {
@@ -785,7 +785,7 @@ func TestFastVsFullChains(t *testing.T) {
 	for i, block := range blocks {
 		headers[i] = block.Header()
 	}
-	if n, err := fast.InsertHeaderChain(headers, 1); err != nil {
+	if n, err := fast.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	if n, err := fast.InsertReceiptChain(blocks, receipts, 0); err != nil {
@@ -800,7 +800,7 @@ func TestFastVsFullChains(t *testing.T) {
 	ancient, _ := NewBlockChain(ancientDb, nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 	defer ancient.Stop()
 
-	if n, err := ancient.InsertHeaderChain(headers, 1); err != nil {
+	if n, err := ancient.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	if n, err := ancient.InsertReceiptChain(blocks, receipts, uint64(len(blocks)/2)); err != nil {
@@ -931,7 +931,7 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
 	for i, block := range blocks {
 		headers[i] = block.Header()
 	}
-	if n, err := fast.InsertHeaderChain(headers, 1); err != nil {
+	if n, err := fast.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	if n, err := fast.InsertReceiptChain(blocks, receipts, 0); err != nil {
@@ -947,7 +947,7 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
 	ancient, _ := NewBlockChain(ancientDb, nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 	defer ancient.Stop()
 
-	if n, err := ancient.InsertHeaderChain(headers, 1); err != nil {
+	if n, err := ancient.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	if n, err := ancient.InsertReceiptChain(blocks, receipts, uint64(3*len(blocks)/4)); err != nil {
@@ -964,7 +964,7 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
 	lightDb := makeDb()
 	defer lightDb.Close()
 	light, _ := NewBlockChain(lightDb, nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
-	if n, err := light.InsertHeaderChain(headers, 1); err != nil {
+	if n, err := light.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	defer light.Stop()
@@ -1781,7 +1781,7 @@ func TestBlockchainRecovery(t *testing.T) {
 	for i, block := range blocks {
 		headers[i] = block.Header()
 	}
-	if n, err := ancient.InsertHeaderChain(headers, 1); err != nil {
+	if n, err := ancient.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	if n, err := ancient.InsertReceiptChain(blocks, receipts, uint64(3*len(blocks)/4)); err != nil {
@@ -1850,7 +1850,7 @@ func TestInsertReceiptChainRollback(t *testing.T) {
 	for i, block := range canonblocks {
 		canonHeaders[i] = block.Header()
 	}
-	if _, err = ancientChain.InsertHeaderChain(canonHeaders, 1); err != nil {
+	if _, err = ancientChain.InsertHeaderChain(canonHeaders); err != nil {
 		t.Fatal("can't import canon headers:", err)
 	}
 
@@ -2128,7 +2128,7 @@ func testInsertKnownChainData(t *testing.T, typ string) {
 			for _, block := range blocks {
 				headers = append(headers, block.Header())
 			}
-			_, err := chain.InsertHeaderChain(headers, 1)
+			_, err := chain.InsertHeaderChain(headers)
 			return err
 		}
 		asserter = func(t *testing.T, block *types.Block) {
@@ -2142,7 +2142,7 @@ func testInsertKnownChainData(t *testing.T, typ string) {
 			for _, block := range blocks {
 				headers = append(headers, block.Header())
 			}
-			_, err := chain.InsertHeaderChain(headers, 1)
+			_, err := chain.InsertHeaderChain(headers)
 			if err != nil {
 				return err
 			}
@@ -2299,7 +2299,7 @@ func testInsertKnownChainDataWithMerging(t *testing.T, typ string, mergeHeight i
 			for _, block := range blocks {
 				headers = append(headers, block.Header())
 			}
-			i, err := chain.InsertHeaderChain(headers, 1)
+			i, err := chain.InsertHeaderChain(headers)
 			if err != nil {
 				return fmt.Errorf("index %d, number %d: %w", i, headers[i].Number, err)
 			}
@@ -2316,7 +2316,7 @@ func testInsertKnownChainDataWithMerging(t *testing.T, typ string, mergeHeight i
 			for _, block := range blocks {
 				headers = append(headers, block.Header())
 			}
-			i, err := chain.InsertHeaderChain(headers, 1)
+			i, err := chain.InsertHeaderChain(headers)
 			if err != nil {
 				return fmt.Errorf("index %d: %w", i, err)
 			}
@@ -2492,7 +2492,7 @@ func TestReorgToShorterRemovesCanonMappingHeaderChain(t *testing.T) {
 	for i, block := range canonblocks {
 		canonHeaders[i] = block.Header()
 	}
-	if n, err := chain.InsertHeaderChain(canonHeaders, 0); err != nil {
+	if n, err := chain.InsertHeaderChain(canonHeaders); err != nil {
 		t.Fatalf("header %d: failed to insert into chain: %v", n, err)
 	}
 	canonNum := chain.CurrentHeader().Number.Uint64()
@@ -2501,7 +2501,7 @@ func TestReorgToShorterRemovesCanonMappingHeaderChain(t *testing.T) {
 	for i, block := range sideblocks {
 		sideHeaders[i] = block.Header()
 	}
-	if n, err := chain.InsertHeaderChain(sideHeaders, 0); err != nil {
+	if n, err := chain.InsertHeaderChain(sideHeaders); err != nil {
 		t.Fatalf("header %d: failed to insert into chain: %v", n, err)
 	}
 	head := chain.CurrentHeader()
@@ -2692,7 +2692,7 @@ func TestSkipStaleTxIndicesInSnapSync(t *testing.T) {
 	for i, block := range blocks {
 		headers[i] = block.Header()
 	}
-	if n, err := chain.InsertHeaderChain(headers, 0); err != nil {
+	if n, err := chain.InsertHeaderChain(headers); err != nil {
 		t.Fatalf("failed to insert header %d: %v", n, err)
 	}
 	// The indices before ancient-N(32) should be ignored. After that all blocks should be indexed.

core/genesis.go

@@ -379,11 +379,9 @@ func SetupGenesisBlockWithOverride(db ethdb.Database, triedb *trie.Database, gen
 	return newcfg, stored, nil
 }
 
-// LoadCliqueConfig loads the stored clique config if the chain config
-// is already present in database, otherwise, return the config in the
-// provided genesis specification. Note the returned clique config can
-// be nil if we are not in the clique network.
-func LoadCliqueConfig(db ethdb.Database, genesis *Genesis) (*params.CliqueConfig, error) {
+// LoadChainConfig loads the stored chain config if it is already present in
+// database, otherwise, return the config in the provided genesis specification.
+func LoadChainConfig(db ethdb.Database, genesis *Genesis) (*params.ChainConfig, error) {
 	// Load the stored chain config from the database. It can be nil
 	// in case the database is empty. Notably, we only care about the
 	// chain config corresponds to the canonical chain.
@@ -391,10 +389,10 @@ func LoadCliqueConfig(db ethdb.Database, genesis *Genesis) (*params.CliqueConfig
 	if stored != (common.Hash{}) {
 		storedcfg := rawdb.ReadChainConfig(db, stored)
 		if storedcfg != nil {
-			return storedcfg.Clique, nil
+			return storedcfg, nil
 		}
 	}
-	// Load the clique config from the provided genesis specification.
+	// Load the config from the provided genesis specification
 	if genesis != nil {
 		// Reject invalid genesis spec without valid chain config
 		if genesis.Config == nil {
@@ -407,12 +405,11 @@ func LoadCliqueConfig(db ethdb.Database, genesis *Genesis) (*params.CliqueConfig
 		if stored != (common.Hash{}) && genesis.ToBlock().Hash() != stored {
 			return nil, &GenesisMismatchError{stored, genesis.ToBlock().Hash()}
 		}
-		return genesis.Config.Clique, nil
+		return genesis.Config, nil
 	}
 	// There is no stored chain config and no new config provided,
-	// In this case the default chain config(mainnet) will be used,
-	// namely ethash is the specified consensus engine, return nil.
-	return nil, nil
+	// In this case the default chain config(mainnet) will be used
+	return params.MainnetChainConfig, nil
 }
 
 func (g *Genesis) configOrDefault(ghash common.Hash) *params.ChainConfig {

eth/api_backend.go

@@ -397,8 +397,8 @@ func (b *EthAPIBackend) Miner() *miner.Miner {
 	return b.eth.Miner()
 }
 
-func (b *EthAPIBackend) StartMining(threads int) error {
-	return b.eth.StartMining(threads)
+func (b *EthAPIBackend) StartMining() error {
+	return b.eth.StartMining()
 }
 
 func (b *EthAPIBackend) StateAtBlock(ctx context.Context, block *types.Block, reexec uint64, base *state.StateDB, readOnly bool, preferDisk bool) (*state.StateDB, tracers.StateReleaseFunc, error) {

eth/catalyst/api_test.go

@@ -440,7 +440,7 @@ func startEthService(t *testing.T, genesis *core.Genesis, blocks []*types.Block)
 		t.Fatal("can't create node:", err)
 	}
 
-	ethcfg := &ethconfig.Config{Genesis: genesis, Ethash: ethash.Config{PowMode: ethash.ModeFake}, SyncMode: downloader.FullSync, TrieTimeout: time.Minute, TrieDirtyCache: 256, TrieCleanCache: 256}
+	ethcfg := &ethconfig.Config{Genesis: genesis, SyncMode: downloader.FullSync, TrieTimeout: time.Minute, TrieDirtyCache: 256, TrieCleanCache: 256}
 	ethservice, err := eth.New(n, ethcfg)
 	if err != nil {
 		t.Fatal("can't create eth service:", err)