309 lines
7.3 KiB
Go
309 lines
7.3 KiB
Go
package miner
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import (
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"fmt"
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"math/big"
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"sort"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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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/pow"
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"github.com/ethereum/go-ethereum/state"
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"gopkg.in/fatih/set.v0"
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)
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var jsonlogger = logger.NewJsonLogger()
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type environment struct {
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totalUsedGas *big.Int
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state *state.StateDB
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coinbase *state.StateObject
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block *types.Block
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family *set.Set
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uncles *set.Set
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}
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func env(block *types.Block, eth core.Backend) *environment {
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state := state.New(block.Root(), eth.StateDb())
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env := &environment{
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totalUsedGas: new(big.Int),
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state: state,
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block: block,
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family: set.New(),
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uncles: set.New(),
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coinbase: state.GetOrNewStateObject(block.Coinbase()),
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}
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return env
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}
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type Work struct {
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Number uint64
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Nonce uint64
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MixDigest []byte
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SeedHash []byte
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}
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type Agent interface {
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Work() chan<- *types.Block
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SetWorkCh(chan<- Work)
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Stop()
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Start()
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GetHashRate() int64
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}
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type worker struct {
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mu sync.Mutex
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agents []Agent
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recv chan Work
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mux *event.TypeMux
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quit chan struct{}
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pow pow.PoW
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eth core.Backend
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chain *core.ChainManager
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proc *core.BlockProcessor
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coinbase common.Address
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current *environment
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uncleMu sync.Mutex
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possibleUncles map[common.Hash]*types.Block
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mining bool
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}
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func newWorker(coinbase common.Address, eth core.Backend) *worker {
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return &worker{
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eth: eth,
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mux: eth.EventMux(),
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recv: make(chan Work),
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chain: eth.ChainManager(),
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proc: eth.BlockProcessor(),
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possibleUncles: make(map[common.Hash]*types.Block),
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coinbase: coinbase,
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}
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}
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func (self *worker) start() {
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self.mining = true
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self.quit = make(chan struct{})
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// spin up agents
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for _, agent := range self.agents {
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agent.Start()
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}
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go self.update()
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go self.wait()
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}
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func (self *worker) stop() {
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self.mining = false
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close(self.quit)
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}
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func (self *worker) register(agent Agent) {
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self.agents = append(self.agents, agent)
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agent.SetWorkCh(self.recv)
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}
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func (self *worker) update() {
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events := self.mux.Subscribe(core.ChainHeadEvent{}, core.NewMinedBlockEvent{}, core.ChainSideEvent{})
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timer := time.NewTicker(2 * time.Second)
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out:
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for {
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select {
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case event := <-events.Chan():
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switch ev := event.(type) {
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case core.ChainHeadEvent:
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if self.current.block != ev.Block {
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self.commitNewWork()
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}
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case core.NewMinedBlockEvent:
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self.commitNewWork()
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case core.ChainSplitEvent:
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self.uncleMu.Lock()
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self.possibleUncles[ev.Block.Hash()] = ev.Block
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self.uncleMu.Unlock()
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}
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case <-self.quit:
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// stop all agents
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for _, agent := range self.agents {
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agent.Stop()
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}
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break out
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case <-timer.C:
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minerlogger.Infoln("Hash rate:", self.HashRate(), "Khash")
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}
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}
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events.Unsubscribe()
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}
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func (self *worker) addUncle(uncle *types.Block) {
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}
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func (self *worker) wait() {
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for {
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for work := range self.recv {
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// Someone Successfully Mined!
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block := self.current.block
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if block.Number().Uint64() == work.Number && block.Nonce() == 0 {
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self.current.block.SetNonce(work.Nonce)
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self.current.block.Header().MixDigest = common.BytesToHash(work.MixDigest)
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jsonlogger.LogJson(&logger.EthMinerNewBlock{
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BlockHash: block.Hash().Hex(),
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BlockNumber: block.Number(),
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ChainHeadHash: block.ParentHeaderHash.Hex(),
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BlockPrevHash: block.ParentHeaderHash.Hex(),
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})
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if err := self.chain.InsertChain(types.Blocks{self.current.block}); err == nil {
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self.mux.Post(core.NewMinedBlockEvent{self.current.block})
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} else {
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self.commitNewWork()
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}
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}
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break
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}
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}
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}
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func (self *worker) push() {
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if self.mining {
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self.current.block.Header().GasUsed = self.current.totalUsedGas
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self.current.block.SetRoot(self.current.state.Root())
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// push new work to agents
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for _, agent := range self.agents {
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agent.Work() <- self.current.block
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}
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}
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}
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func (self *worker) commitNewWork() {
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self.mu.Lock()
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defer self.mu.Unlock()
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block := self.chain.NewBlock(self.coinbase)
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self.current = env(block, self.eth)
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for _, ancestor := range self.chain.GetAncestors(block, 7) {
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self.current.family.Add(ancestor.Hash())
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}
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parent := self.chain.GetBlock(self.current.block.ParentHash())
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self.current.coinbase.SetGasPool(core.CalcGasLimit(parent, self.current.block))
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transactions := self.eth.TxPool().GetTransactions()
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sort.Sort(types.TxByNonce{transactions})
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minerlogger.Infof("committing new work with %d txs\n", len(transactions))
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// Keep track of transactions which return errors so they can be removed
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var remove types.Transactions
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gasLimit:
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for i, tx := range transactions {
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err := self.commitTransaction(tx)
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switch {
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case core.IsNonceErr(err):
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fallthrough
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case core.IsInvalidTxErr(err):
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// Remove invalid transactions
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from, _ := tx.From()
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self.chain.TxState().RemoveNonce(from, tx.Nonce())
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remove = append(remove, tx)
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minerlogger.Infof("TX (%x) failed, will be removed: %v\n", tx.Hash().Bytes()[:4], err)
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minerlogger.Infoln(tx)
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case state.IsGasLimitErr(err):
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minerlogger.Infof("Gas limit reached for block. %d TXs included in this block\n", i)
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// Break on gas limit
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break gasLimit
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}
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}
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self.eth.TxPool().RemoveSet(remove)
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ucount := 0
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for hash, uncle := range self.possibleUncles {
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if ucount == 2 {
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break
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}
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if err := self.commitUncle(uncle.Header()); err != nil {
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minerlogger.Infof("Bad uncle found and will be removed (%x)\n", hash[:4])
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minerlogger.Debugln(uncle)
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} else {
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minerlogger.Infof("Commiting %x as uncle\n", hash[:4])
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ucount++
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}
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}
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minerlogger.Infoln("Included %d uncle(s)")
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self.current.state.AddBalance(self.coinbase, core.BlockReward)
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self.current.state.Update(common.Big0)
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self.push()
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}
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var (
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inclusionReward = new(big.Int).Div(core.BlockReward, big.NewInt(32))
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_uncleReward = new(big.Int).Mul(core.BlockReward, big.NewInt(15))
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uncleReward = new(big.Int).Div(_uncleReward, big.NewInt(16))
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)
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func (self *worker) commitUncle(uncle *types.Header) error {
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if self.current.uncles.Has(uncle.Hash()) {
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// Error not unique
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return core.UncleError("Uncle not unique")
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}
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self.current.uncles.Add(uncle.Hash())
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if !self.current.family.Has(uncle.ParentHash) {
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return core.UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
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}
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if self.current.family.Has(uncle.Hash()) {
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return core.UncleError(fmt.Sprintf("Uncle already in family (%x)", uncle.Hash()))
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}
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uncleAccount := self.current.state.GetAccount(uncle.Coinbase)
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uncleAccount.AddBalance(uncleReward)
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self.current.coinbase.AddBalance(uncleReward)
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return nil
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}
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func (self *worker) commitTransaction(tx *types.Transaction) error {
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snap := self.current.state.Copy()
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receipt, _, err := self.proc.ApplyTransaction(self.current.coinbase, self.current.state, self.current.block, tx, self.current.totalUsedGas, true)
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if err != nil && (core.IsNonceErr(err) || state.IsGasLimitErr(err) || core.IsInvalidTxErr(err)) {
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self.current.state.Set(snap)
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return err
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}
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self.current.block.AddTransaction(tx)
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self.current.block.AddReceipt(receipt)
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return nil
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}
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func (self *worker) HashRate() int64 {
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var tot int64
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for _, agent := range self.agents {
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tot += agent.GetHashRate()
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}
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return tot
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}
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