// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus 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 dexon-consensus 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 dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package dex
import (
"fmt"
"path/filepath"
"time"
dexCore "github.com/dexon-foundation/dexon-consensus/core"
"github.com/dexon-foundation/dexon-consensus/core/blockdb"
coreEcdsa "github.com/dexon-foundation/dexon-consensus/core/crypto/ecdsa"
coreTypes "github.com/dexon-foundation/dexon-consensus/core/types"
"github.com/dexon-foundation/dexon/accounts"
"github.com/dexon-foundation/dexon/consensus"
"github.com/dexon-foundation/dexon/consensus/dexcon"
"github.com/dexon-foundation/dexon/core"
"github.com/dexon-foundation/dexon/core/bloombits"
"github.com/dexon-foundation/dexon/core/rawdb"
"github.com/dexon-foundation/dexon/core/vm"
"github.com/dexon-foundation/dexon/dex/gasprice"
"github.com/dexon-foundation/dexon/eth/downloader"
"github.com/dexon-foundation/dexon/eth/filters"
"github.com/dexon-foundation/dexon/ethdb"
"github.com/dexon-foundation/dexon/event"
"github.com/dexon-foundation/dexon/internal/ethapi"
"github.com/dexon-foundation/dexon/log"
"github.com/dexon-foundation/dexon/node"
"github.com/dexon-foundation/dexon/p2p"
"github.com/dexon-foundation/dexon/params"
"github.com/dexon-foundation/dexon/rpc"
)
// Dexon implementes the DEXON fullnode service.
type Dexon struct {
config *Config
chainConfig *params.ChainConfig
// Channel for shutting down the service
shutdownChan chan bool // Channel for shutting down the Ethereum
// Handlers
txPool *core.TxPool
blockchain *core.BlockChain
protocolManager *ProtocolManager
// DB interfaces
chainDb ethdb.Database // Block chain database
eventMux *event.TypeMux
engine consensus.Engine
accountManager *accounts.Manager
bloomRequests chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
bloomIndexer *core.ChainIndexer // Bloom indexer operating during block imports
APIBackend *DexAPIBackend
// Dexon consensus.
app *DexconApp
governance *DexconGovernance
network *DexconNetwork
blockdb blockdb.BlockDatabase
consensus *dexCore.Consensus
networkID uint64
netRPCService *ethapi.PublicNetAPI
}
func New(ctx *node.ServiceContext, config *Config) (*Dexon, error) {
// Consensus.
blockDBPath := filepath.Join(ctx.Config.DataDir, "dexcon", "blockdb")
db, err := blockdb.NewLevelDBBackedBlockDB(blockDBPath)
if err != nil {
panic(err)
}
chainDb, err := CreateDB(ctx, config, "chaindata")
if err != nil {
return nil, err
}
chainConfig, genesisHash, genesisErr := core.SetupGenesisBlock(chainDb,
config.Genesis)
if _, ok := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !ok {
return nil, genesisErr
}
log.Info("Initialised chain configuration", "config", chainConfig)
if !config.SkipBcVersionCheck {
bcVersion := rawdb.ReadDatabaseVersion(chainDb)
if bcVersion != nil && *bcVersion != core.BlockChainVersion {
return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d).\n",
bcVersion, core.BlockChainVersion)
}
rawdb.WriteDatabaseVersion(chainDb, core.BlockChainVersion)
}
engine := dexcon.New()
dex := &Dexon{
config: config,
chainDb: chainDb,
chainConfig: chainConfig,
eventMux: ctx.EventMux,
accountManager: ctx.AccountManager,
shutdownChan: make(chan bool),
networkID: config.NetworkId,
bloomRequests: make(chan chan *bloombits.Retrieval),
bloomIndexer: NewBloomIndexer(chainDb, params.BloomBitsBlocks, params.BloomConfirms),
blockdb: db,
engine: engine,
}
var (
vmConfig = vm.Config{
EnablePreimageRecording: config.EnablePreimageRecording,
EWASMInterpreter: config.EWASMInterpreter,
EVMInterpreter: config.EVMInterpreter,
}
cacheConfig = &core.CacheConfig{Disabled: config.NoPruning, TrieCleanLimit: config.TrieCleanCache, TrieDirtyLimit: config.TrieDirtyCache, TrieTimeLimit: config.TrieTimeout}
)
dex.blockchain, err = core.NewBlockChainWithDexonValidator(chainDb, cacheConfig,
dex.chainConfig, dex.engine, vmConfig, nil)
// Rewind the chain in case of an incompatible config upgrade.
if compat, ok := genesisErr.(*params.ConfigCompatError); ok {
log.Warn("Rewinding chain to upgrade configuration", "err", compat)
dex.blockchain.SetHead(compat.RewindTo)
rawdb.WriteChainConfig(chainDb, genesisHash, chainConfig)
}
dex.bloomIndexer.Start(dex.blockchain)
if config.TxPool.Journal != "" {
config.TxPool.Journal = ctx.ResolvePath(config.TxPool.Journal)
}
dex.txPool = core.NewTxPool(config.TxPool, dex.chainConfig, dex.blockchain)
dex.APIBackend = &DexAPIBackend{dex, nil}
gpoParams := config.GPO
if gpoParams.Default == nil {
gpoParams.Default = config.DefaultGasPrice
}
dex.APIBackend.gpo = gasprice.NewOracle(dex.APIBackend, gpoParams)
// Dexcon related objects.
dex.governance = NewDexconGovernance(dex.APIBackend, dex.chainConfig, config.PrivateKey)
dex.app = NewDexconApp(dex.txPool, dex.blockchain, dex.governance, chainDb, config, vmConfig)
// Set config fetcher so engine can fetch current system configuration from state.
engine.SetConfigFetcher(dex.governance)
pm, err := NewProtocolManager(dex.chainConfig, config.SyncMode,
config.NetworkId, dex.eventMux, dex.txPool, dex.engine, dex.blockchain,
chainDb, dex.governance)
if err != nil {
return nil, err
}
dex.protocolManager = pm
dex.network = NewDexconNetwork(pm)
privKey := coreEcdsa.NewPrivateKeyFromECDSA(config.PrivateKey)
// TODO(w): set this correctly in config.
now := time.Now()
dMoment := time.Date(
now.Year(), now.Month(), now.Day(),
now.Hour(), now.Minute(), (now.Second()/5+1)*5,
0, now.Location())
dex.consensus = dexCore.NewConsensus(dMoment,
dex.app, dex.governance, db, dex.network, privKey, log.Root())
return dex, nil
}
func (s *Dexon) Protocols() []p2p.Protocol {
return s.protocolManager.SubProtocols
}
func (s *Dexon) APIs() []rpc.API {
apis := ethapi.GetAPIs(s.APIBackend)
// Append any APIs exposed explicitly by the consensus engine
apis = append(apis, s.engine.APIs(s.BlockChain())...)
// Append all the local APIs and return
return append(apis, []rpc.API{
{
Namespace: "eth",
Version: "1.0",
Service: downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
Public: true,
}, {
Namespace: "eth",
Version: "1.0",
Service: filters.NewPublicFilterAPI(s.APIBackend, false),
Public: true,
}, {
Namespace: "admin",
Version: "1.0",
Service: NewPrivateAdminAPI(s),
}, {
Namespace: "debug",
Version: "1.0",
Service: NewPublicDebugAPI(s),
Public: true,
}, {
Namespace: "debug",
Version: "1.0",
Service: NewPrivateDebugAPI(s.chainConfig, s),
}, {
Namespace: "net",
Version: "1.0",
Service: s.netRPCService,
Public: true,
},
}...)
}
func (s *Dexon) Start(srvr *p2p.Server) error {
// Start the bloom bits servicing goroutines
s.startBloomHandlers(params.BloomBitsBlocks)
// Start the RPC service
s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.NetVersion())
// Figure out a max peers count based on the server limits
maxPeers := srvr.MaxPeers
if s.config.LightServ > 0 {
if s.config.LightPeers >= srvr.MaxPeers {
return fmt.Errorf("invalid peer config: light peer count (%d) >= total peer count (%d)", s.config.LightPeers, srvr.MaxPeers)
}
maxPeers -= s.config.LightPeers
}
// Start the networking layer and the light server if requested
s.protocolManager.Start(srvr, maxPeers)
s.protocolManager.addSelfMeta()
return nil
}
func (s *Dexon) Stop() error {
return nil
}
func (s *Dexon) StartProposing() error {
// TODO: Run with the latest confirmed block in compaction chain.
s.consensus.Run(&coreTypes.Block{})
return nil
}
// CreateDB creates the chain database.
func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Database, error) {
db, err := ctx.OpenDatabase(name, config.DatabaseCache, config.DatabaseHandles)
if err != nil {
return nil, err
}
if db, ok := db.(*ethdb.LDBDatabase); ok {
db.Meter("eth/db/chaindata/")
}
return db, nil
}
func (d *Dexon) AccountManager() *accounts.Manager { return d.accountManager }
func (d *Dexon) BlockChain() *core.BlockChain { return d.blockchain }
func (d *Dexon) TxPool() *core.TxPool { return d.txPool }
func (d *Dexon) DexVersion() int { return int(d.protocolManager.SubProtocols[0].Version) }
func (d *Dexon) EventMux() *event.TypeMux { return d.eventMux }
func (d *Dexon) Engine() consensus.Engine { return d.engine }
func (d *Dexon) ChainDb() ethdb.Database { return d.chainDb }
func (d *Dexon) Downloader() *downloader.Downloader { return d.protocolManager.downloader }
func (d *Dexon) NetVersion() uint64 { return d.networkID }
