go-ethereum/eth/ethconfig/config.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 ethconfig contains the configuration of the ETH and LES protocols.
package ethconfig

import (
	"math/big"
	"os"
	"os/user"
	"path/filepath"
	"runtime"
	"time"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/consensus"
	"github.com/ethereum/go-ethereum/consensus/beacon"
	"github.com/ethereum/go-ethereum/consensus/bor"
	"github.com/ethereum/go-ethereum/consensus/bor/contract"
	"github.com/ethereum/go-ethereum/consensus/bor/heimdall" //nolint:typecheck
	"github.com/ethereum/go-ethereum/consensus/bor/heimdall/span"
	"github.com/ethereum/go-ethereum/consensus/bor/heimdallapp"
	"github.com/ethereum/go-ethereum/consensus/bor/heimdallgrpc"
	"github.com/ethereum/go-ethereum/consensus/clique"
	"github.com/ethereum/go-ethereum/consensus/ethash"
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/eth/downloader"
	"github.com/ethereum/go-ethereum/eth/gasprice"
	"github.com/ethereum/go-ethereum/ethdb"
	"github.com/ethereum/go-ethereum/internal/ethapi"
	"github.com/ethereum/go-ethereum/log"
	"github.com/ethereum/go-ethereum/miner"
	"github.com/ethereum/go-ethereum/node"
	"github.com/ethereum/go-ethereum/params"
)

// FullNodeGPO contains default gasprice oracle settings for full node.
var FullNodeGPO = gasprice.Config{
	Blocks:           20,
	Percentile:       60,
	MaxHeaderHistory: 1024,
	MaxBlockHistory:  1024,
	MaxPrice:         gasprice.DefaultMaxPrice,
	IgnorePrice:      gasprice.DefaultIgnorePrice,
}

// LightClientGPO contains default gasprice oracle settings for light client.
var LightClientGPO = gasprice.Config{
	Blocks:           2,
	Percentile:       60,
	MaxHeaderHistory: 300,
	MaxBlockHistory:  5,
	MaxPrice:         gasprice.DefaultMaxPrice,
	IgnorePrice:      gasprice.DefaultIgnorePrice,
}

// Defaults contains default settings for use on the Ethereum main net.
var Defaults = Config{
	SyncMode: downloader.SnapSync,
	Ethash: ethash.Config{
		CacheDir:         "ethash",
		CachesInMem:      2,
		CachesOnDisk:     3,
		CachesLockMmap:   false,
		DatasetsInMem:    1,
		DatasetsOnDisk:   2,
		DatasetsLockMmap: false,
	},
	NetworkId:               1,
	TxLookupLimit:           2350000,
	LightPeers:              100,
	UltraLightFraction:      75,
	DatabaseCache:           512,
	TrieCleanCache:          154,
	TrieCleanCacheJournal:   "triecache",
	TrieCleanCacheRejournal: 60 * time.Minute,
	TrieDirtyCache:          256,
	TrieTimeout:             60 * time.Minute,
	SnapshotCache:           102,
	Miner: miner.Config{
		GasCeil:  8000000,
		GasPrice: big.NewInt(params.GWei),
		Recommit: 125 * time.Second,
	},
	TxPool:             core.DefaultTxPoolConfig,
	RPCGasCap:          50000000,
	RPCReturnDataLimit: 100000,
	RPCEVMTimeout:      5 * time.Second,
	GPO:                FullNodeGPO,
	RPCTxFeeCap:        5, // 5 matic
}

func init() {
	home := os.Getenv("HOME")
	if home == "" {
		if user, err := user.Current(); err == nil {
			home = user.HomeDir
		}
	}
	if runtime.GOOS == "darwin" {
		Defaults.Ethash.DatasetDir = filepath.Join(home, "Library", "Ethash")
	} else if runtime.GOOS == "windows" {
		localappdata := os.Getenv("LOCALAPPDATA")
		if localappdata != "" {
			Defaults.Ethash.DatasetDir = filepath.Join(localappdata, "Ethash")
		} else {
			Defaults.Ethash.DatasetDir = filepath.Join(home, "AppData", "Local", "Ethash")
		}
	} else {
		Defaults.Ethash.DatasetDir = filepath.Join(home, ".ethash")
	}
}

//go:generate gencodec -type Config -formats toml -out gen_config.go

// Config contains configuration options for of the ETH and LES protocols.
type Config struct {
	// The genesis block, which is inserted if the database is empty.
	// If nil, the Ethereum main net block is used.
	Genesis *core.Genesis `toml:",omitempty"`

	// Protocol options
	NetworkId uint64 // Network ID to use for selecting peers to connect to
	SyncMode  downloader.SyncMode

	// This can be set to list of enrtree:// URLs which will be queried for
	// for nodes to connect to.
	EthDiscoveryURLs  []string
	SnapDiscoveryURLs []string

	NoPruning  bool // Whether to disable pruning and flush everything to disk
	NoPrefetch bool // Whether to disable prefetching and only load state on demand

	TxLookupLimit uint64 `toml:",omitempty"` // The maximum number of blocks from head whose tx indices are reserved.

	// PeerRequiredBlocks is a set of block number -> hash mappings which must be in the
	// canonical chain of all remote peers. Setting the option makes geth verify the
	// presence of these blocks for every new peer connection.
	PeerRequiredBlocks map[uint64]common.Hash `toml:"-"`

	// Light client options
	LightServ          int  `toml:",omitempty"` // Maximum percentage of time allowed for serving LES requests
	LightIngress       int  `toml:",omitempty"` // Incoming bandwidth limit for light servers
	LightEgress        int  `toml:",omitempty"` // Outgoing bandwidth limit for light servers
	LightPeers         int  `toml:",omitempty"` // Maximum number of LES client peers
	LightNoPrune       bool `toml:",omitempty"` // Whether to disable light chain pruning
	LightNoSyncServe   bool `toml:",omitempty"` // Whether to serve light clients before syncing
	SyncFromCheckpoint bool `toml:",omitempty"` // Whether to sync the header chain from the configured checkpoint

	// Ultra Light client options
	UltraLightServers      []string `toml:",omitempty"` // List of trusted ultra light servers
	UltraLightFraction     int      `toml:",omitempty"` // Percentage of trusted servers to accept an announcement
	UltraLightOnlyAnnounce bool     `toml:",omitempty"` // Whether to only announce headers, or also serve them

	// Database options
	SkipBcVersionCheck bool `toml:"-"`
	DatabaseHandles    int  `toml:"-"`
	DatabaseCache      int
	DatabaseFreezer    string

	TrieCleanCache          int
	TrieCleanCacheJournal   string        `toml:",omitempty"` // Disk journal directory for trie cache to survive node restarts
	TrieCleanCacheRejournal time.Duration `toml:",omitempty"` // Time interval to regenerate the journal for clean cache
	TrieDirtyCache          int
	TrieTimeout             time.Duration
	SnapshotCache           int
	Preimages               bool
	TriesInMemory           uint64

	// Mining options
	Miner miner.Config

	// Ethash options
	Ethash ethash.Config

	// Transaction pool options
	TxPool core.TxPoolConfig

	// Gas Price Oracle options
	GPO gasprice.Config

	// Enables tracking of SHA3 preimages in the VM
	EnablePreimageRecording bool

	// Miscellaneous options
	DocRoot string `toml:"-"`

	// RPCGasCap is the global gas cap for eth-call variants.
	RPCGasCap uint64

	// Maximum size (in bytes) a result of an rpc request could have
	RPCReturnDataLimit uint64

	// RPCEVMTimeout is the global timeout for eth-call.
	RPCEVMTimeout time.Duration

	// RPCTxFeeCap is the global transaction fee(price * gaslimit) cap for
	// send-transction variants. The unit is ether.
	RPCTxFeeCap float64

	// Checkpoint is a hardcoded checkpoint which can be nil.
	Checkpoint *params.TrustedCheckpoint `toml:",omitempty"`

	// CheckpointOracle is the configuration for checkpoint oracle.
	CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`

	// URL to connect to Heimdall node
	HeimdallURL string

	// No heimdall service
	WithoutHeimdall bool

	// Address to connect to Heimdall gRPC server
	HeimdallgRPCAddress string

	// Run heimdall service as a child process
	RunHeimdall bool

	// Arguments to pass to heimdall service
	RunHeimdallArgs string

	// Use child heimdall process to fetch data, Only works when RunHeimdall is true
	UseHeimdallApp bool

	// Bor logs flag
	BorLogs bool

	// Arrow Glacier block override (TODO: remove after the fork)
	OverrideArrowGlacier *big.Int `toml:",omitempty"`

	// OverrideTerminalTotalDifficulty (TODO: remove after the fork)
	OverrideTerminalTotalDifficulty *big.Int `toml:",omitempty"`

	// Develop Fake Author mode to produce blocks without authorisation
	DevFakeAuthor bool `hcl:"devfakeauthor,optional" toml:"devfakeauthor,optional"`
}

// CreateConsensusEngine creates a consensus engine for the given chain configuration.
func CreateConsensusEngine(stack *node.Node, chainConfig *params.ChainConfig, ethConfig *Config, notify []string, noverify bool, db ethdb.Database, blockchainAPI *ethapi.PublicBlockChainAPI) consensus.Engine {
	config := &ethConfig.Ethash

	// If proof-of-authority is requested, set it up
	var engine consensus.Engine
	if chainConfig.Clique != nil {
		return clique.New(chainConfig.Clique, db)
	}

	// If Matic bor consensus is requested, set it up
	// In order to pass the ethereum transaction tests, we need to set the burn contract which is in the bor config
	// Then, bor != nil will also be enabled for ethash and clique. Only enable Bor for real if there is a validator contract present.
	if chainConfig.Bor != nil && chainConfig.Bor.ValidatorContract != "" {
		genesisContractsClient := contract.NewGenesisContractsClient(chainConfig, chainConfig.Bor.ValidatorContract, chainConfig.Bor.StateReceiverContract, blockchainAPI)
		spanner := span.NewChainSpanner(blockchainAPI, contract.ValidatorSet(), chainConfig, common.HexToAddress(chainConfig.Bor.ValidatorContract))

		if ethConfig.WithoutHeimdall {
			return bor.New(chainConfig, db, blockchainAPI, spanner, nil, genesisContractsClient, ethConfig.DevFakeAuthor)
		} else {
			if ethConfig.DevFakeAuthor {
				log.Warn("Sanitizing DevFakeAuthor", "Use DevFakeAuthor with", "--bor.withoutheimdall")
			}
			var heimdallClient bor.IHeimdallClient
			if ethConfig.RunHeimdall && ethConfig.UseHeimdallApp {
				heimdallClient = heimdallapp.NewHeimdallAppClient()
			} else if ethConfig.HeimdallgRPCAddress != "" {
				heimdallClient = heimdallgrpc.NewHeimdallGRPCClient(ethConfig.HeimdallgRPCAddress)
			} else {
				heimdallClient = heimdall.NewHeimdallClient(ethConfig.HeimdallURL)
			}

			return bor.New(chainConfig, db, blockchainAPI, spanner, heimdallClient, genesisContractsClient, false)
		}
	} else {
		switch config.PowMode {
		case ethash.ModeFake:
			log.Warn("Ethash used in fake mode")
		case ethash.ModeTest:
			log.Warn("Ethash used in test mode")
		case ethash.ModeShared:
			log.Warn("Ethash used in shared mode")
		}
		engine = ethash.New(ethash.Config{
			PowMode:          config.PowMode,
			CacheDir:         stack.ResolvePath(config.CacheDir),
			CachesInMem:      config.CachesInMem,
			CachesOnDisk:     config.CachesOnDisk,
			CachesLockMmap:   config.CachesLockMmap,
			DatasetDir:       config.DatasetDir,
			DatasetsInMem:    config.DatasetsInMem,
			DatasetsOnDisk:   config.DatasetsOnDisk,
			DatasetsLockMmap: config.DatasetsLockMmap,
			NotifyFull:       config.NotifyFull,
		}, notify, noverify)
		engine.(*ethash.Ethash).SetThreads(-1) // Disable CPU mining
	}
	return beacon.New(engine)
}