gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

core, consensus: pluggable consensus engines (#3817)

Browse Source 
This commit adds pluggable consensus engines to go-ethereum. In short, it
introduces a generic consensus interface, and refactors the entire codebase to
use this interface.
This commit is contained in:
Péter Szilágyi
2017-04-05 01:16:29 +03:00
committed by Felix Lange
parent e50a5b7771
commit 09777952ee
61 changed files with 1681 additions and 1426 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
core/blockchain.go
View File

@ -30,6 +30,7 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -39,7 +40,6 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
"github.com/hashicorp/golang-lru"
@ -104,7 +104,7 @@ type BlockChain struct {
procInterrupt int32 // interrupt signaler for block processing
wg sync.WaitGroup // chain processing wait group for shutting down
pow pow.PoW
engine consensus.Engine
processor Processor // block processor interface
validator Validator // block and state validator interface
vmConfig vm.Config
@ -115,7 +115,7 @@ type BlockChain struct {
// NewBlockChain returns a fully initialised block chain using information
// available in the database. It initialiser the default Ethereum Validator and
// Processor.
func NewBlockChain(chainDb ethdb.Database, config *params.ChainConfig, pow pow.PoW, mux *event.TypeMux, vmConfig vm.Config) (*BlockChain, error) {
func NewBlockChain(chainDb ethdb.Database, config *params.ChainConfig, engine consensus.Engine, mux *event.TypeMux, vmConfig vm.Config) (*BlockChain, error) {
bodyCache, _ := lru.New(bodyCacheLimit)
bodyRLPCache, _ := lru.New(bodyCacheLimit)
blockCache, _ := lru.New(blockCacheLimit)
@ -131,25 +131,22 @@ func NewBlockChain(chainDb ethdb.Database, config *params.ChainConfig, pow pow.P
bodyRLPCache: bodyRLPCache,
blockCache: blockCache,
futureBlocks: futureBlocks,
pow: pow,
engine: engine,
vmConfig: vmConfig,
badBlocks: badBlocks,
}
bc.SetValidator(NewBlockValidator(config, bc, pow))
bc.SetProcessor(NewStateProcessor(config, bc))
bc.SetValidator(NewBlockValidator(config, bc, engine))
bc.SetProcessor(NewStateProcessor(config, bc, engine))
gv := func() HeaderValidator { return bc.Validator() }
var err error
bc.hc, err = NewHeaderChain(chainDb, config, gv, bc.getProcInterrupt)
bc.hc, err = NewHeaderChain(chainDb, config, engine, bc.getProcInterrupt)
if err != nil {
return nil, err
}
bc.genesisBlock = bc.GetBlockByNumber(0)
if bc.genesisBlock == nil {
return nil, ErrNoGenesis
}
if err := bc.loadLastState(); err != nil {
return nil, err
}
@ -233,9 +230,6 @@ func (self *BlockChain) loadLastState() error {
log.Info("Loaded most recent local full block", "number", self.currentBlock.Number(), "hash", self.currentBlock.Hash(), "td", blockTd)
log.Info("Loaded most recent local fast block", "number", self.currentFastBlock.Number(), "hash", self.currentFastBlock.Hash(), "td", fastTd)
// Try to be smart and issue a pow verification for the head to pre-generate caches
go self.pow.Verify(types.NewBlockWithHeader(currentHeader))
return nil
}
@ -383,9 +377,6 @@ func (self *BlockChain) Processor() Processor {
return self.processor
}
// AuxValidator returns the auxiliary validator (Proof of work atm)
func (self *BlockChain) AuxValidator() pow.PoW { return self.pow }
// State returns a new mutable state based on the current HEAD block.
func (self *BlockChain) State() (*state.StateDB, error) {
return self.StateAt(self.CurrentBlock().Root())
@ -906,38 +897,38 @@ func (self *BlockChain) InsertChain(chain types.Blocks) (int, error) {
stats = insertStats{startTime: mclock.Now()}
events = make([]interface{}, 0, len(chain))
coalescedLogs []*types.Log
nonceChecked = make([]bool, len(chain))
)
// Start the parallel nonce verifier.
nonceAbort, nonceResults := verifyNoncesFromBlocks(self.pow, chain)
defer close(nonceAbort)
// Start the parallel header verifier
headers := make([]*types.Header, len(chain))
seals := make([]bool, len(chain))
for i, block := range chain {
headers[i] = block.Header()
seals[i] = true
}
abort, results := self.engine.VerifyHeaders(self, headers, seals)
defer close(abort)
// Iterate over the blocks and insert when the verifier permits
for i, block := range chain {
// If the chain is terminating, stop processing blocks
if atomic.LoadInt32(&self.procInterrupt) == 1 {
log.Debug("Premature abort during blocks processing")
break
}
bstart := time.Now()
// Wait for block i's nonce to be verified before processing
// its state transition.
for !nonceChecked[i] {
r := <-nonceResults
nonceChecked[r.index] = true
if !r.valid {
invalid := chain[r.index]
return r.index, &BlockNonceErr{Hash: invalid.Hash(), Number: invalid.Number(), Nonce: invalid.Nonce()}
}
}
// If the header is a banned one, straight out abort
if BadHashes[block.Hash()] {
err := BadHashError(block.Hash())
self.reportBlock(block, nil, err)
return i, err
}
// Stage 1 validation of the block using the chain's validator
// interface.
err := self.Validator().ValidateBlock(block)
// Wait for the block's verification to complete
bstart := time.Now()
err := <-results
if err == nil {
err = self.Validator().ValidateBody(block)
}
if err != nil {
if IsKnownBlockErr(err) {
stats.ignored++
@ -952,7 +943,6 @@ func (self *BlockChain) InsertChain(chain types.Blocks) (int, error) {
if block.Time().Cmp(max) == 1 {
return i, fmt.Errorf("%v: BlockFutureErr, %v > %v", BlockFutureErr, block.Time(), max)
}
self.futureBlocks.Add(block.Hash(), block)
stats.queued++
continue