mirror of https://github.com/poanetwork/quorum.git
850 lines
23 KiB
Go
850 lines
23 KiB
Go
package core
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import (
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"bytes"
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"fmt"
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"io"
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"math/big"
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"runtime"
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"sync"
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"sync/atomic"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/compression/rle"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/pow"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/hashicorp/golang-lru"
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"github.com/syndtr/goleveldb/leveldb"
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)
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var (
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chainlogger = logger.NewLogger("CHAIN")
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jsonlogger = logger.NewJsonLogger()
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blockHashPre = []byte("block-hash-")
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blockNumPre = []byte("block-num-")
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blockInsertTimer = metrics.GetOrRegisterTimer("core/BlockInsertions", metrics.DefaultRegistry)
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)
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const (
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blockCacheLimit = 256
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maxFutureBlocks = 256
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maxTimeFutureBlocks = 30
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)
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// CalcDifficulty is the difficulty adjustment algorithm. It returns
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// the difficulty that a new block b should have when created at time
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// given the parent block's time and difficulty.
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func CalcDifficulty(time int64, parentTime int64, parentDiff *big.Int) *big.Int {
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diff := new(big.Int)
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adjust := new(big.Int).Div(parentDiff, params.DifficultyBoundDivisor)
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if big.NewInt(time-parentTime).Cmp(params.DurationLimit) < 0 {
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diff.Add(parentDiff, adjust)
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} else {
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diff.Sub(parentDiff, adjust)
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}
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if diff.Cmp(params.MinimumDifficulty) < 0 {
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return params.MinimumDifficulty
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}
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return diff
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}
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// CalcTD computes the total difficulty of block.
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func CalcTD(block, parent *types.Block) *big.Int {
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if parent == nil {
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return block.Difficulty()
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}
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d := block.Difficulty()
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d.Add(d, parent.Td)
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return d
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}
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// CalcGasLimit computes the gas limit of the next block after parent.
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// The result may be modified by the caller.
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func CalcGasLimit(parent *types.Block) *big.Int {
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decay := new(big.Int).Div(parent.GasLimit(), params.GasLimitBoundDivisor)
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contrib := new(big.Int).Mul(parent.GasUsed(), big.NewInt(3))
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contrib = contrib.Div(contrib, big.NewInt(2))
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contrib = contrib.Div(contrib, params.GasLimitBoundDivisor)
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gl := new(big.Int).Sub(parent.GasLimit(), decay)
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gl = gl.Add(gl, contrib)
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gl = gl.Add(gl, big.NewInt(1))
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gl.Set(common.BigMax(gl, params.MinGasLimit))
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if gl.Cmp(params.GenesisGasLimit) < 0 {
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gl.Add(parent.GasLimit(), decay)
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gl.Set(common.BigMin(gl, params.GenesisGasLimit))
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}
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return gl
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}
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type ChainManager struct {
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//eth EthManager
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blockDb common.Database
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stateDb common.Database
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processor types.BlockProcessor
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eventMux *event.TypeMux
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genesisBlock *types.Block
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// Last known total difficulty
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mu sync.RWMutex
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chainmu sync.RWMutex
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tsmu sync.RWMutex
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td *big.Int
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currentBlock *types.Block
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lastBlockHash common.Hash
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currentGasLimit *big.Int
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transState *state.StateDB
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txState *state.ManagedState
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cache *lru.Cache // cache is the LRU caching
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futureBlocks *BlockCache // future blocks are blocks added for later processing
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pendingBlocks *BlockCache // pending blocks contain blocks not yet written to the db
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quit chan struct{}
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// procInterrupt must be atomically called
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procInterrupt int32 // interrupt signaler for block processing
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wg sync.WaitGroup
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pow pow.PoW
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}
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func NewChainManager(genesis *types.Block, blockDb, stateDb common.Database, pow pow.PoW, mux *event.TypeMux) (*ChainManager, error) {
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cache, _ := lru.New(blockCacheLimit)
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bc := &ChainManager{
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blockDb: blockDb,
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stateDb: stateDb,
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genesisBlock: GenesisBlock(42, stateDb),
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eventMux: mux,
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quit: make(chan struct{}),
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cache: cache,
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pow: pow,
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}
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// Check the genesis block given to the chain manager. If the genesis block mismatches block number 0
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// throw an error. If no block or the same block's found continue.
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if g := bc.GetBlockByNumber(0); g != nil && g.Hash() != genesis.Hash() {
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return nil, fmt.Errorf("Genesis mismatch. Maybe different nonce (%d vs %d)? %x / %x", g.Nonce(), genesis.Nonce(), g.Hash().Bytes()[:4], genesis.Hash().Bytes()[:4])
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}
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bc.genesisBlock = genesis
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bc.setLastState()
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// Check the current state of the block hashes and make sure that we do not have any of the bad blocks in our chain
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for hash, _ := range BadHashes {
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if block := bc.GetBlock(hash); block != nil {
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glog.V(logger.Error).Infof("Found bad hash. Reorganising chain to state %x\n", block.ParentHash().Bytes()[:4])
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block = bc.GetBlock(block.ParentHash())
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if block == nil {
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glog.Fatal("Unable to complete. Parent block not found. Corrupted DB?")
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}
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bc.SetHead(block)
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glog.V(logger.Error).Infoln("Chain reorg was successfull. Resuming normal operation")
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}
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}
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bc.transState = bc.State().Copy()
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// Take ownership of this particular state
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bc.txState = state.ManageState(bc.State().Copy())
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bc.futureBlocks = NewBlockCache(maxFutureBlocks)
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bc.makeCache()
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go bc.update()
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return bc, nil
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}
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func (bc *ChainManager) SetHead(head *types.Block) {
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bc.mu.Lock()
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defer bc.mu.Unlock()
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for block := bc.currentBlock; block != nil && block.Hash() != head.Hash(); block = bc.GetBlock(block.ParentHash()) {
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bc.removeBlock(block)
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}
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bc.cache, _ = lru.New(blockCacheLimit)
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bc.currentBlock = head
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bc.makeCache()
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statedb := state.New(head.Root(), bc.stateDb)
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bc.txState = state.ManageState(statedb)
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bc.transState = statedb.Copy()
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bc.setTotalDifficulty(head.Td)
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bc.insert(head)
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bc.setLastState()
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}
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func (self *ChainManager) Td() *big.Int {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return new(big.Int).Set(self.td)
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}
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func (self *ChainManager) GasLimit() *big.Int {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.currentBlock.GasLimit()
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}
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func (self *ChainManager) LastBlockHash() common.Hash {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.lastBlockHash
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}
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func (self *ChainManager) CurrentBlock() *types.Block {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.currentBlock
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}
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func (self *ChainManager) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return new(big.Int).Set(self.td), self.currentBlock.Hash(), self.genesisBlock.Hash()
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}
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func (self *ChainManager) SetProcessor(proc types.BlockProcessor) {
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self.processor = proc
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}
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func (self *ChainManager) State() *state.StateDB {
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return state.New(self.CurrentBlock().Root(), self.stateDb)
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}
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func (self *ChainManager) TransState() *state.StateDB {
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self.tsmu.RLock()
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defer self.tsmu.RUnlock()
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return self.transState
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}
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func (self *ChainManager) setTransState(statedb *state.StateDB) {
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self.transState = statedb
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}
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func (bc *ChainManager) setLastState() {
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data, _ := bc.blockDb.Get([]byte("LastBlock"))
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if len(data) != 0 {
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block := bc.GetBlock(common.BytesToHash(data))
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if block != nil {
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bc.currentBlock = block
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bc.lastBlockHash = block.Hash()
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} else {
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glog.Fatalf("Fatal. LastBlock not found. Please run removedb and resync")
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}
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} else {
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bc.Reset()
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}
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bc.td = bc.currentBlock.Td
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bc.currentGasLimit = CalcGasLimit(bc.currentBlock)
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if glog.V(logger.Info) {
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glog.Infof("Last block (#%v) %x TD=%v\n", bc.currentBlock.Number(), bc.currentBlock.Hash(), bc.td)
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}
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}
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func (bc *ChainManager) makeCache() {
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bc.cache, _ = lru.New(blockCacheLimit)
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// load in last `blockCacheLimit` - 1 blocks. Last block is the current.
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ancestors := bc.GetAncestors(bc.currentBlock, blockCacheLimit-1)
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ancestors = append(ancestors, bc.currentBlock)
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for _, block := range ancestors {
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bc.cache.Add(block.Hash(), block)
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}
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}
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func (bc *ChainManager) Reset() {
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bc.mu.Lock()
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defer bc.mu.Unlock()
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for block := bc.currentBlock; block != nil; block = bc.GetBlock(block.ParentHash()) {
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bc.removeBlock(block)
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}
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bc.cache, _ = lru.New(blockCacheLimit)
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// Prepare the genesis block
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bc.write(bc.genesisBlock)
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bc.insert(bc.genesisBlock)
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bc.currentBlock = bc.genesisBlock
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bc.makeCache()
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bc.setTotalDifficulty(common.Big("0"))
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}
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func (bc *ChainManager) removeBlock(block *types.Block) {
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bc.blockDb.Delete(append(blockHashPre, block.Hash().Bytes()...))
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}
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func (bc *ChainManager) ResetWithGenesisBlock(gb *types.Block) {
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bc.mu.Lock()
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defer bc.mu.Unlock()
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for block := bc.currentBlock; block != nil; block = bc.GetBlock(block.ParentHash()) {
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bc.removeBlock(block)
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}
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// Prepare the genesis block
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gb.Td = gb.Difficulty()
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bc.genesisBlock = gb
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bc.write(bc.genesisBlock)
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bc.insert(bc.genesisBlock)
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bc.currentBlock = bc.genesisBlock
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bc.makeCache()
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bc.td = gb.Difficulty()
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}
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// Export writes the active chain to the given writer.
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func (self *ChainManager) Export(w io.Writer) error {
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if err := self.ExportN(w, uint64(0), self.currentBlock.NumberU64()); err != nil {
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return err
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}
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return nil
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}
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// ExportN writes a subset of the active chain to the given writer.
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func (self *ChainManager) ExportN(w io.Writer, first uint64, last uint64) error {
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self.mu.RLock()
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defer self.mu.RUnlock()
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if first > last {
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return fmt.Errorf("export failed: first (%d) is greater than last (%d)", first, last)
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}
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glog.V(logger.Info).Infof("exporting %d blocks...\n", last-first+1)
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for nr := first; nr <= last; nr++ {
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block := self.GetBlockByNumber(nr)
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if block == nil {
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return fmt.Errorf("export failed on #%d: not found", nr)
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}
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if err := block.EncodeRLP(w); err != nil {
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return err
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}
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}
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return nil
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}
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// insert injects a block into the current chain block chain. Note, this function
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// assumes that the `mu` mutex is held!
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func (bc *ChainManager) insert(block *types.Block) {
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key := append(blockNumPre, block.Number().Bytes()...)
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err := bc.blockDb.Put(key, block.Hash().Bytes())
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if err != nil {
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glog.Fatal("db write fail:", err)
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}
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err = bc.blockDb.Put([]byte("LastBlock"), block.Hash().Bytes())
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if err != nil {
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glog.Fatal("db write fail:", err)
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}
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bc.currentBlock = block
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bc.lastBlockHash = block.Hash()
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}
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func (bc *ChainManager) write(block *types.Block) {
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tstart := time.Now()
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go func() {
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enc, _ := rlp.EncodeToBytes((*types.StorageBlock)(block))
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key := append(blockHashPre, block.Hash().Bytes()...)
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err := bc.blockDb.Put(key, enc)
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if err != nil {
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glog.Fatal("db write fail:", err)
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}
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}()
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if glog.V(logger.Debug) {
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glog.Infof("wrote block #%v %s. Took %v\n", block.Number(), common.PP(block.Hash().Bytes()), time.Since(tstart))
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}
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}
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// Accessors
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func (bc *ChainManager) Genesis() *types.Block {
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return bc.genesisBlock
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}
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// Block fetching methods
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func (bc *ChainManager) HasBlock(hash common.Hash) bool {
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if bc.cache.Contains(hash) {
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return true
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}
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if bc.pendingBlocks != nil {
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if block := bc.pendingBlocks.Get(hash); block != nil {
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return true
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}
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}
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data, _ := bc.blockDb.Get(append(blockHashPre, hash[:]...))
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return len(data) != 0
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}
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func (self *ChainManager) GetBlockHashesFromHash(hash common.Hash, max uint64) (chain []common.Hash) {
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block := self.GetBlock(hash)
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if block == nil {
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return
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}
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// XXX Could be optimised by using a different database which only holds hashes (i.e., linked list)
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for i := uint64(0); i < max; i++ {
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block = self.GetBlock(block.ParentHash())
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if block == nil {
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break
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}
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chain = append(chain, block.Hash())
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if block.Number().Cmp(common.Big0) <= 0 {
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break
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}
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}
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return
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}
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func (self *ChainManager) GetBlock(hash common.Hash) *types.Block {
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if block, ok := self.cache.Get(hash); ok {
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return block.(*types.Block)
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}
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if self.pendingBlocks != nil {
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if block := self.pendingBlocks.Get(hash); block != nil {
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return block
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}
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}
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data, _ := self.blockDb.Get(append(blockHashPre, hash[:]...))
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if len(data) == 0 {
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return nil
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}
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var block types.StorageBlock
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if err := rlp.Decode(bytes.NewReader(data), &block); err != nil {
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glog.V(logger.Error).Infof("invalid block RLP for hash %x: %v", hash, err)
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return nil
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}
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// Add the block to the cache
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self.cache.Add(hash, (*types.Block)(&block))
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return (*types.Block)(&block)
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}
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func (self *ChainManager) GetBlockByNumber(num uint64) *types.Block {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.getBlockByNumber(num)
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}
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// GetBlocksFromHash returns the block corresponding to hash and up to n-1 ancestors.
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func (self *ChainManager) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block) {
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for i := 0; i < n; i++ {
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block := self.GetBlock(hash)
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if block == nil {
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break
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}
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blocks = append(blocks, block)
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hash = block.ParentHash()
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}
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return
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}
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// non blocking version
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func (self *ChainManager) getBlockByNumber(num uint64) *types.Block {
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key, _ := self.blockDb.Get(append(blockNumPre, big.NewInt(int64(num)).Bytes()...))
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if len(key) == 0 {
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return nil
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}
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return self.GetBlock(common.BytesToHash(key))
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}
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func (self *ChainManager) GetUnclesInChain(block *types.Block, length int) (uncles []*types.Header) {
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for i := 0; block != nil && i < length; i++ {
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uncles = append(uncles, block.Uncles()...)
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block = self.GetBlock(block.ParentHash())
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}
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return
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}
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// setTotalDifficulty updates the TD of the chain manager. Note, this function
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// assumes that the `mu` mutex is held!
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func (bc *ChainManager) setTotalDifficulty(td *big.Int) {
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bc.td = new(big.Int).Set(td)
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}
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func (bc *ChainManager) Stop() {
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close(bc.quit)
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atomic.StoreInt32(&bc.procInterrupt, 1)
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bc.wg.Wait()
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glog.V(logger.Info).Infoln("Chain manager stopped")
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}
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type queueEvent struct {
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queue []interface{}
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canonicalCount int
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sideCount int
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splitCount int
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}
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func (self *ChainManager) procFutureBlocks() {
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var blocks []*types.Block
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self.futureBlocks.Each(func(i int, block *types.Block) {
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blocks = append(blocks, block)
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})
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if len(blocks) > 0 {
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types.BlockBy(types.Number).Sort(blocks)
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self.InsertChain(blocks)
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}
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}
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func (self *ChainManager) enqueueForWrite(block *types.Block) {
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self.pendingBlocks.Push(block)
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}
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func (self *ChainManager) flushQueuedBlocks() {
|
|
db, batchWrite := self.blockDb.(*ethdb.LDBDatabase)
|
|
batch := new(leveldb.Batch)
|
|
self.pendingBlocks.Each(func(i int, block *types.Block) {
|
|
enc, _ := rlp.EncodeToBytes((*types.StorageBlock)(block))
|
|
key := append(blockHashPre, block.Hash().Bytes()...)
|
|
if batchWrite {
|
|
batch.Put(key, rle.Compress(enc))
|
|
} else {
|
|
self.blockDb.Put(key, enc)
|
|
}
|
|
})
|
|
if batchWrite {
|
|
db.LDB().Write(batch, nil)
|
|
}
|
|
}
|
|
|
|
// InsertChain will attempt to insert the given chain in to the canonical chain or, otherwise, create a fork. It an error is returned
|
|
// it will return the index number of the failing block as well an error describing what went wrong (for possible errors see core/errors.go).
|
|
func (self *ChainManager) InsertChain(chain types.Blocks) (int, error) {
|
|
self.wg.Add(1)
|
|
defer self.wg.Done()
|
|
|
|
self.chainmu.Lock()
|
|
defer self.chainmu.Unlock()
|
|
|
|
self.pendingBlocks = NewBlockCache(len(chain))
|
|
|
|
// A queued approach to delivering events. This is generally
|
|
// faster than direct delivery and requires much less mutex
|
|
// acquiring.
|
|
var (
|
|
queue = make([]interface{}, len(chain))
|
|
queueEvent = queueEvent{queue: queue}
|
|
stats struct{ queued, processed, ignored int }
|
|
tstart = time.Now()
|
|
|
|
nonceDone = make(chan nonceResult, len(chain))
|
|
nonceQuit = make(chan struct{})
|
|
nonceChecked = make([]bool, len(chain))
|
|
)
|
|
|
|
// Start the parallel nonce verifier.
|
|
go verifyNonces(self.pow, chain, nonceQuit, nonceDone)
|
|
defer close(nonceQuit)
|
|
defer self.flushQueuedBlocks()
|
|
|
|
defer func() {
|
|
}()
|
|
|
|
txcount := 0
|
|
for i, block := range chain {
|
|
if atomic.LoadInt32(&self.procInterrupt) == 1 {
|
|
glog.V(logger.Debug).Infoln("Premature abort during chain processing")
|
|
break
|
|
}
|
|
|
|
bstart := time.Now()
|
|
// Wait for block i's nonce to be verified before processing
|
|
// its state transition.
|
|
for !nonceChecked[i] {
|
|
r := <-nonceDone
|
|
nonceChecked[r.i] = true
|
|
if !r.valid {
|
|
block := chain[r.i]
|
|
return r.i, &BlockNonceErr{Hash: block.Hash(), Number: block.Number(), Nonce: block.Nonce()}
|
|
}
|
|
}
|
|
|
|
if BadHashes[block.Hash()] {
|
|
err := fmt.Errorf("Found known bad hash in chain %x", block.Hash())
|
|
blockErr(block, err)
|
|
return i, err
|
|
}
|
|
|
|
// Setting block.Td regardless of error (known for example) prevents errors down the line
|
|
// in the protocol handler
|
|
block.Td = new(big.Int).Set(CalcTD(block, self.GetBlock(block.ParentHash())))
|
|
|
|
// Call in to the block processor and check for errors. It's likely that if one block fails
|
|
// all others will fail too (unless a known block is returned).
|
|
logs, err := self.processor.Process(block)
|
|
if err != nil {
|
|
if IsKnownBlockErr(err) {
|
|
stats.ignored++
|
|
continue
|
|
}
|
|
|
|
if err == BlockFutureErr {
|
|
// Allow up to MaxFuture second in the future blocks. If this limit
|
|
// is exceeded the chain is discarded and processed at a later time
|
|
// if given.
|
|
if max := time.Now().Unix() + maxTimeFutureBlocks; block.Time() > max {
|
|
return i, fmt.Errorf("%v: BlockFutureErr, %v > %v", BlockFutureErr, block.Time(), max)
|
|
}
|
|
|
|
self.futureBlocks.Push(block)
|
|
stats.queued++
|
|
continue
|
|
}
|
|
|
|
if IsParentErr(err) && self.futureBlocks.Has(block.ParentHash()) {
|
|
self.futureBlocks.Push(block)
|
|
stats.queued++
|
|
continue
|
|
}
|
|
|
|
blockErr(block, err)
|
|
|
|
return i, err
|
|
}
|
|
|
|
txcount += len(block.Transactions())
|
|
|
|
cblock := self.currentBlock
|
|
// Compare the TD of the last known block in the canonical chain to make sure it's greater.
|
|
// At this point it's possible that a different chain (fork) becomes the new canonical chain.
|
|
if block.Td.Cmp(self.Td()) > 0 {
|
|
// chain fork
|
|
if block.ParentHash() != cblock.Hash() {
|
|
// during split we merge two different chains and create the new canonical chain
|
|
err := self.merge(cblock, block)
|
|
if err != nil {
|
|
return i, err
|
|
}
|
|
|
|
queue[i] = ChainSplitEvent{block, logs}
|
|
queueEvent.splitCount++
|
|
}
|
|
|
|
self.mu.Lock()
|
|
self.setTotalDifficulty(block.Td)
|
|
self.insert(block)
|
|
self.mu.Unlock()
|
|
|
|
jsonlogger.LogJson(&logger.EthChainNewHead{
|
|
BlockHash: block.Hash().Hex(),
|
|
BlockNumber: block.Number(),
|
|
ChainHeadHash: cblock.Hash().Hex(),
|
|
BlockPrevHash: block.ParentHash().Hex(),
|
|
})
|
|
|
|
self.setTransState(state.New(block.Root(), self.stateDb))
|
|
self.txState.SetState(state.New(block.Root(), self.stateDb))
|
|
|
|
queue[i] = ChainEvent{block, block.Hash(), logs}
|
|
queueEvent.canonicalCount++
|
|
|
|
if glog.V(logger.Debug) {
|
|
glog.Infof("[%v] inserted block #%d (%d TXs %d UNCs) (%x...). Took %v\n", time.Now().UnixNano(), block.Number(), len(block.Transactions()), len(block.Uncles()), block.Hash().Bytes()[0:4], time.Since(bstart))
|
|
}
|
|
} else {
|
|
if glog.V(logger.Detail) {
|
|
glog.Infof("inserted forked block #%d (TD=%v) (%d TXs %d UNCs) (%x...). Took %v\n", block.Number(), block.Difficulty(), len(block.Transactions()), len(block.Uncles()), block.Hash().Bytes()[0:4], time.Since(bstart))
|
|
}
|
|
|
|
queue[i] = ChainSideEvent{block, logs}
|
|
queueEvent.sideCount++
|
|
}
|
|
// not in the canonical chain.
|
|
self.enqueueForWrite(block)
|
|
// Delete from future blocks
|
|
self.futureBlocks.Delete(block.Hash())
|
|
|
|
stats.processed++
|
|
blockInsertTimer.UpdateSince(bstart)
|
|
}
|
|
|
|
if (stats.queued > 0 || stats.processed > 0 || stats.ignored > 0) && bool(glog.V(logger.Info)) {
|
|
tend := time.Since(tstart)
|
|
start, end := chain[0], chain[len(chain)-1]
|
|
glog.Infof("imported %d block(s) (%d queued %d ignored) including %d txs in %v. #%v [%x / %x]\n", stats.processed, stats.queued, stats.ignored, txcount, tend, end.Number(), start.Hash().Bytes()[:4], end.Hash().Bytes()[:4])
|
|
}
|
|
|
|
go self.eventMux.Post(queueEvent)
|
|
|
|
return 0, nil
|
|
}
|
|
|
|
// diff takes two blocks, an old chain and a new chain and will reconstruct the blocks and inserts them
|
|
// to be part of the new canonical chain.
|
|
func (self *ChainManager) diff(oldBlock, newBlock *types.Block) (types.Blocks, error) {
|
|
var (
|
|
newChain types.Blocks
|
|
commonBlock *types.Block
|
|
oldStart = oldBlock
|
|
newStart = newBlock
|
|
)
|
|
|
|
// first reduce whoever is higher bound
|
|
if oldBlock.NumberU64() > newBlock.NumberU64() {
|
|
// reduce old chain
|
|
for oldBlock = oldBlock; oldBlock != nil && oldBlock.NumberU64() != newBlock.NumberU64(); oldBlock = self.GetBlock(oldBlock.ParentHash()) {
|
|
}
|
|
} else {
|
|
// reduce new chain and append new chain blocks for inserting later on
|
|
for newBlock = newBlock; newBlock != nil && newBlock.NumberU64() != oldBlock.NumberU64(); newBlock = self.GetBlock(newBlock.ParentHash()) {
|
|
newChain = append(newChain, newBlock)
|
|
}
|
|
}
|
|
if oldBlock == nil {
|
|
return nil, fmt.Errorf("Invalid old chain")
|
|
}
|
|
if newBlock == nil {
|
|
return nil, fmt.Errorf("Invalid new chain")
|
|
}
|
|
|
|
numSplit := newBlock.Number()
|
|
for {
|
|
if oldBlock.Hash() == newBlock.Hash() {
|
|
commonBlock = oldBlock
|
|
break
|
|
}
|
|
newChain = append(newChain, newBlock)
|
|
|
|
oldBlock, newBlock = self.GetBlock(oldBlock.ParentHash()), self.GetBlock(newBlock.ParentHash())
|
|
if oldBlock == nil {
|
|
return nil, fmt.Errorf("Invalid old chain")
|
|
}
|
|
if newBlock == nil {
|
|
return nil, fmt.Errorf("Invalid new chain")
|
|
}
|
|
}
|
|
|
|
if glog.V(logger.Info) {
|
|
commonHash := commonBlock.Hash()
|
|
glog.Infof("Fork detected @ %x. Reorganising chain from #%v %x to %x", commonHash[:4], numSplit, oldStart.Hash().Bytes()[:4], newStart.Hash().Bytes()[:4])
|
|
}
|
|
|
|
return newChain, nil
|
|
}
|
|
|
|
// merge merges two different chain to the new canonical chain
|
|
func (self *ChainManager) merge(oldBlock, newBlock *types.Block) error {
|
|
newChain, err := self.diff(oldBlock, newBlock)
|
|
if err != nil {
|
|
return fmt.Errorf("chain reorg failed: %v", err)
|
|
}
|
|
|
|
// insert blocks. Order does not matter. Last block will be written in ImportChain itself which creates the new head properly
|
|
self.mu.Lock()
|
|
for _, block := range newChain {
|
|
self.insert(block)
|
|
}
|
|
self.mu.Unlock()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (self *ChainManager) update() {
|
|
events := self.eventMux.Subscribe(queueEvent{})
|
|
futureTimer := time.Tick(5 * time.Second)
|
|
out:
|
|
for {
|
|
select {
|
|
case ev := <-events.Chan():
|
|
switch ev := ev.(type) {
|
|
case queueEvent:
|
|
for _, event := range ev.queue {
|
|
switch event := event.(type) {
|
|
case ChainEvent:
|
|
// We need some control over the mining operation. Acquiring locks and waiting for the miner to create new block takes too long
|
|
// and in most cases isn't even necessary.
|
|
if self.lastBlockHash == event.Hash {
|
|
self.currentGasLimit = CalcGasLimit(event.Block)
|
|
self.eventMux.Post(ChainHeadEvent{event.Block})
|
|
}
|
|
}
|
|
|
|
self.eventMux.Post(event)
|
|
}
|
|
}
|
|
case <-futureTimer:
|
|
self.procFutureBlocks()
|
|
case <-self.quit:
|
|
break out
|
|
}
|
|
}
|
|
}
|
|
|
|
func blockErr(block *types.Block, err error) {
|
|
h := block.Header()
|
|
glog.V(logger.Error).Infof("Bad block #%v (%x)\n", h.Number, h.Hash().Bytes())
|
|
glog.V(logger.Error).Infoln(err)
|
|
glog.V(logger.Debug).Infoln(verifyNonces)
|
|
}
|
|
|
|
type nonceResult struct {
|
|
i int
|
|
valid bool
|
|
}
|
|
|
|
// block verifies nonces of the given blocks in parallel and returns
|
|
// an error if one of the blocks nonce verifications failed.
|
|
func verifyNonces(pow pow.PoW, blocks []*types.Block, quit <-chan struct{}, done chan<- nonceResult) {
|
|
// Spawn a few workers. They listen for blocks on the in channel
|
|
// and send results on done. The workers will exit in the
|
|
// background when in is closed.
|
|
var (
|
|
in = make(chan int)
|
|
nworkers = runtime.GOMAXPROCS(0)
|
|
)
|
|
defer close(in)
|
|
if len(blocks) < nworkers {
|
|
nworkers = len(blocks)
|
|
}
|
|
for i := 0; i < nworkers; i++ {
|
|
go func() {
|
|
for i := range in {
|
|
done <- nonceResult{i: i, valid: pow.Verify(blocks[i])}
|
|
}
|
|
}()
|
|
}
|
|
// Feed block indices to the workers.
|
|
for i := range blocks {
|
|
select {
|
|
case in <- i:
|
|
continue
|
|
case <-quit:
|
|
return
|
|
}
|
|
}
|
|
}
|