/
config.go
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/
config.go
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// Modifications Copyright 2019 The klaytn Authors
// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// 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/>.
//
// This file is derived from eth/config.go (2018/06/04).
// Modified and improved for the klaytn development.
package sc
import (
"crypto/ecdsa"
"fmt"
"github.com/klaytn/klaytn/common"
"github.com/klaytn/klaytn/crypto"
"github.com/klaytn/klaytn/log"
"github.com/klaytn/klaytn/networks/p2p/discover"
"os"
"os/user"
"path/filepath"
"runtime"
"strings"
"time"
)
const (
datadirMainChainBridgeNodes = "main-bridges.json" // Path within the datadir to the static node list
)
var logger = log.NewModuleLogger(log.ServiceChain)
// DefaultConfig contains default settings for use on the Klaytn main net.
var DefaultConfig = SCConfig{
NetworkId: 1,
MaxPeer: 1, // Only a single main-bridge and sub-bridge pair is allowed.
}
func init() {
home := os.Getenv("HOME")
if home == "" {
if user, err := user.Current(); err == nil {
home = user.HomeDir
}
}
}
//go:generate gencodec -type SCConfig -formats toml -out gen_config.go
type SCConfig struct {
// Name sets the instance name of the node. It must not contain the / character and is
// used in the devp2p node identifier. The instance name is "kscn". If no
// value is specified, the basename of the current executable is used.
Name string `toml:"-"`
// BridgeService
EnabledMainBridge bool
EnabledSubBridge bool
DataDir string
// Protocol options
NetworkId uint64 // Network ID to use for selecting peers to connect to
// Database options
SkipBcVersionCheck bool `toml:"-"`
DatabaseHandles int `toml:"-"`
LevelDBCacheSize int
TrieCacheSize int
TrieTimeout time.Duration
TrieBlockInterval uint
ChildChainIndexing bool
// Network
MainBridgePort string
SubBridgePort string
MaxPeer int
// ServiceChain
ServiceChainConsensus string
AnchoringPeriod uint64
SentChainTxsLimit uint64
ParentChainID uint64
VTRecovery bool
VTRecoveryInterval uint64
Anchoring bool
}
// NodeName returns the devp2p node identifier.
func (c *SCConfig) NodeName() string {
name := c.name()
// Backwards compatibility: previous versions used title-cased "Klaytn", keep that.
if name == "klay" || name == "klay-testnet" {
name = "Klaytn"
}
name += "/" + runtime.GOOS + "-" + runtime.GOARCH
name += "/" + runtime.Version()
return name
}
func (c *SCConfig) name() string {
if c.Name == "" {
progname := strings.TrimSuffix(filepath.Base(os.Args[0]), ".exe")
if progname == "" {
panic("empty executable name, set Config.Name")
}
return progname
}
return c.Name
}
// StaticNodes returns a list of node enode URLs configured as static nodes.
func (c *SCConfig) MainBridges() []*discover.Node {
return c.parsePersistentNodes(filepath.Join(c.DataDir, datadirMainChainBridgeNodes))
}
func (c *SCConfig) parsePersistentNodes(path string) []*discover.Node {
// Short circuit if no node config is present
if c.DataDir == "" {
return nil
}
if _, err := os.Stat(path); err != nil {
return nil
}
// Load the nodes from the config file.
var nodelist []string
if err := common.LoadJSON(path, &nodelist); err != nil {
logger.Error(fmt.Sprintf("Can't load node file %s: %v", path, err))
return nil
}
// Interpret the list as a discovery node array
var nodes []*discover.Node
for _, url := range nodelist {
if url == "" {
continue
}
node, err := discover.ParseNode(url)
if err != nil {
logger.Error(fmt.Sprintf("Node URL %s: %v\n", url, err))
continue
}
nodes = append(nodes, node)
}
return nodes
}
// ResolvePath resolves path in the instance directory.
func (c *SCConfig) ResolvePath(path string) string {
if filepath.IsAbs(path) {
return path
}
if c.DataDir == "" {
return ""
}
return filepath.Join(c.instanceDir(), path)
}
func (c *SCConfig) instanceDir() string {
if c.DataDir == "" {
return ""
}
return filepath.Join(c.DataDir, c.name())
}
func (c *SCConfig) getKey(path string) *ecdsa.PrivateKey {
keyFile := c.ResolvePath(path)
if key, err := crypto.LoadECDSA(keyFile); err == nil {
return key
}
// No persistent key found, generate and store a new one.
key, err := crypto.GenerateKey()
if err != nil {
logger.Crit("Failed to generate chain key", "err", err)
}
instanceDir := filepath.Join(c.DataDir, c.name())
if err := os.MkdirAll(instanceDir, 0700); err != nil {
logger.Crit("Failed to make dir to persist chain key", "err", err)
}
keyFile = filepath.Join(instanceDir, path)
if err := crypto.SaveECDSA(keyFile, key); err != nil {
logger.Crit("Failed to persist chain key", "err", err)
}
return key
}