github.com/tuotoo/go-ethereum@v1.7.4-0.20171121184211-049797d40a24/eth/config.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package eth
    18  
    19  import (
    20  	"math/big"
    21  	"os"
    22  	"os/user"
    23  	"path/filepath"
    24  	"runtime"
    25  
    26  	"github.com/ethereum/go-ethereum/common"
    27  	"github.com/ethereum/go-ethereum/common/hexutil"
    28  	"github.com/ethereum/go-ethereum/core"
    29  	"github.com/ethereum/go-ethereum/eth/downloader"
    30  	"github.com/ethereum/go-ethereum/eth/gasprice"
    31  	"github.com/ethereum/go-ethereum/params"
    32  )
    33  
    34  // DefaultConfig contains default settings for use on the Ethereum main net.
    35  var DefaultConfig = Config{
    36  	SyncMode:             downloader.FastSync,
    37  	EthashCacheDir:       "ethash",
    38  	EthashCachesInMem:    2,
    39  	EthashCachesOnDisk:   3,
    40  	EthashDatasetsInMem:  1,
    41  	EthashDatasetsOnDisk: 2,
    42  	NetworkId:            1,
    43  	LightPeers:           20,
    44  	DatabaseCache:        128,
    45  	GasPrice:             big.NewInt(18 * params.Shannon),
    46  
    47  	TxPool: core.DefaultTxPoolConfig,
    48  	GPO: gasprice.Config{
    49  		Blocks:     10,
    50  		Percentile: 50,
    51  	},
    52  }
    53  
    54  func init() {
    55  	home := os.Getenv("HOME")
    56  	if home == "" {
    57  		if user, err := user.Current(); err == nil {
    58  			home = user.HomeDir
    59  		}
    60  	}
    61  	if runtime.GOOS == "windows" {
    62  		DefaultConfig.EthashDatasetDir = filepath.Join(home, "AppData", "Ethash")
    63  	} else {
    64  		DefaultConfig.EthashDatasetDir = filepath.Join(home, ".ethash")
    65  	}
    66  }
    67  
    68  //go:generate gencodec -type Config -field-override configMarshaling -formats toml -out gen_config.go
    69  
    70  type Config struct {
    71  	// The genesis block, which is inserted if the database is empty.
    72  	// If nil, the Ethereum main net block is used.
    73  	Genesis *core.Genesis `toml:",omitempty"`
    74  
    75  	// Protocol options
    76  	NetworkId uint64 // Network ID to use for selecting peers to connect to
    77  	SyncMode  downloader.SyncMode
    78  
    79  	// Light client options
    80  	LightServ  int `toml:",omitempty"` // Maximum percentage of time allowed for serving LES requests
    81  	LightPeers int `toml:",omitempty"` // Maximum number of LES client peers
    82  
    83  	// Database options
    84  	SkipBcVersionCheck bool `toml:"-"`
    85  	DatabaseHandles    int  `toml:"-"`
    86  	DatabaseCache      int
    87  
    88  	// Mining-related options
    89  	Etherbase    common.Address `toml:",omitempty"`
    90  	MinerThreads int            `toml:",omitempty"`
    91  	ExtraData    []byte         `toml:",omitempty"`
    92  	GasPrice     *big.Int
    93  
    94  	// Ethash options
    95  	EthashCacheDir       string
    96  	EthashCachesInMem    int
    97  	EthashCachesOnDisk   int
    98  	EthashDatasetDir     string
    99  	EthashDatasetsInMem  int
   100  	EthashDatasetsOnDisk int
   101  
   102  	// Transaction pool options
   103  	TxPool core.TxPoolConfig
   104  
   105  	// Gas Price Oracle options
   106  	GPO gasprice.Config
   107  
   108  	// Enables tracking of SHA3 preimages in the VM
   109  	EnablePreimageRecording bool
   110  
   111  	// Miscellaneous options
   112  	DocRoot   string `toml:"-"`
   113  	PowFake   bool   `toml:"-"`
   114  	PowTest   bool   `toml:"-"`
   115  	PowShared bool   `toml:"-"`
   116  }
   117  
   118  type configMarshaling struct {
   119  	ExtraData hexutil.Bytes
   120  }