// 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 . // 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/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, MaxPrice: gasprice.DefaultMaxPrice, IgnorePrice: gasprice.DefaultIgnorePrice, } // LightClientGPO contains default gasprice oracle settings for light client. var LightClientGPO = gasprice.Config{ Blocks: 2, Percentile: 60, MaxPrice: gasprice.DefaultMaxPrice, IgnorePrice: gasprice.DefaultIgnorePrice, } // Defaults contains default settings for use on the Ethereum main net. var Defaults = Config{ SyncMode: downloader.FastSync, 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{ GasFloor: 8000000, GasCeil: 8000000, GasPrice: big.NewInt(params.GWei), Recommit: 3 * time.Second, }, TxPool: core.DefaultTxPoolConfig, RPCGasCap: 25000000, 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 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. // Whitelist of required block number -> hash values to accept Whitelist 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:"-"` // Type of the EWASM interpreter ("" for default) EWASMInterpreter string // Type of the EVM interpreter ("" for default) EVMInterpreter string // RPCGasCap is the global gas cap for eth-call variants. RPCGasCap uint64 // 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"` // Berlin block override (TODO: remove after the fork) OverrideLondon *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 if chainConfig.Clique != nil { return clique.New(chainConfig.Clique, db) } // Otherwise assume proof-of-work 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.SetThreads(-1) // Disable CPU mining return engine }