Official Go implementation of the Ethereum protocol
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go-ethereum/eth/ethconfig/config.go

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// 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/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/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: 30000000,
GasPrice: big.NewInt(params.GWei),
Recommit: 3 * time.Second,
},
TxPool: core.DefaultTxPoolConfig,
RPCGasCap: 50000000,
RPCEVMTimeout: 5 * time.Second,
GPO: FullNodeGPO,
RPCTxFeeCap: 1, // 1 ether
}
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 go run github.com/fjl/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.
// RequiredBlocks 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.
RequiredBlocks 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
// 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
// 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"`
// 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"`
}
// CreateConsensusEngine creates a consensus engine for the given chain configuration.
func CreateConsensusEngine(stack *node.Node, chainConfig *params.ChainConfig, config *ethash.Config, notify []string, noverify bool, db ethdb.Database) consensus.Engine {
// If proof-of-authority is requested, set it up
var engine consensus.Engine
if chainConfig.Clique != nil {
engine = clique.New(chainConfig.Clique, db)
} 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)
}