709 lines
21 KiB
Go
709 lines
21 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package miner
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import (
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"bytes"
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"fmt"
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"math/big"
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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/accounts"
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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/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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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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"gopkg.in/fatih/set.v0"
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)
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var jsonlogger = logger.NewJsonLogger()
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const (
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resultQueueSize = 10
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miningLogAtDepth = 5
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)
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// Agent can register themself with the worker
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type Agent interface {
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Work() chan<- *Work
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SetReturnCh(chan<- *Result)
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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 uint64RingBuffer struct {
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ints []uint64 //array of all integers in buffer
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next int //where is the next insertion? assert 0 <= next < len(ints)
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}
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// environment is the workers current environment and holds
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// all of the current state information
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type Work struct {
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config *core.ChainConfig
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state *state.StateDB // apply state changes here
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ancestors *set.Set // ancestor set (used for checking uncle parent validity)
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family *set.Set // family set (used for checking uncle invalidity)
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uncles *set.Set // uncle set
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remove *set.Set // tx which will be removed
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tcount int // tx count in cycle
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ignoredTransactors *set.Set
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lowGasTransactors *set.Set
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ownedAccounts *set.Set
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lowGasTxs types.Transactions
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localMinedBlocks *uint64RingBuffer // the most recent block numbers that were mined locally (used to check block inclusion)
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Block *types.Block // the new block
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header *types.Header
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txs []*types.Transaction
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receipts []*types.Receipt
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createdAt time.Time
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}
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type Result struct {
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Work *Work
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Block *types.Block
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}
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// worker is the main object which takes care of applying messages to the new state
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type worker struct {
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config *core.ChainConfig
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mu sync.Mutex
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// update loop
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mux *event.TypeMux
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events event.Subscription
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wg sync.WaitGroup
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agents map[Agent]struct{}
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recv chan *Result
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pow pow.PoW
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eth core.Backend
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chain *core.BlockChain
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proc core.Validator
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chainDb ethdb.Database
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coinbase common.Address
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gasPrice *big.Int
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extra []byte
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currentMu sync.Mutex
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current *Work
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uncleMu sync.Mutex
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possibleUncles map[common.Hash]*types.Block
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txQueueMu sync.Mutex
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txQueue map[common.Hash]*types.Transaction
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// atomic status counters
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mining int32
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atWork int32
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fullValidation bool
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}
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func newWorker(config *core.ChainConfig, coinbase common.Address, eth core.Backend) *worker {
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worker := &worker{
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config: config,
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eth: eth,
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mux: eth.EventMux(),
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chainDb: eth.ChainDb(),
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recv: make(chan *Result, resultQueueSize),
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gasPrice: new(big.Int),
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chain: eth.BlockChain(),
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proc: eth.BlockChain().Validator(),
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possibleUncles: make(map[common.Hash]*types.Block),
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coinbase: coinbase,
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txQueue: make(map[common.Hash]*types.Transaction),
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agents: make(map[Agent]struct{}),
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fullValidation: false,
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}
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worker.events = worker.mux.Subscribe(core.ChainHeadEvent{}, core.ChainSideEvent{}, core.TxPreEvent{})
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go worker.update()
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go worker.wait()
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worker.commitNewWork()
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return worker
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}
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func (self *worker) setEtherbase(addr common.Address) {
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self.mu.Lock()
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defer self.mu.Unlock()
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self.coinbase = addr
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}
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func (self *worker) pending() (*types.Block, *state.StateDB) {
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self.currentMu.Lock()
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defer self.currentMu.Unlock()
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if atomic.LoadInt32(&self.mining) == 0 {
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return types.NewBlock(
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self.current.header,
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self.current.txs,
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nil,
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self.current.receipts,
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), self.current.state
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}
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return self.current.Block, self.current.state
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}
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func (self *worker) start() {
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self.mu.Lock()
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defer self.mu.Unlock()
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atomic.StoreInt32(&self.mining, 1)
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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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}
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func (self *worker) stop() {
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self.wg.Wait()
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self.mu.Lock()
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defer self.mu.Unlock()
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if atomic.LoadInt32(&self.mining) == 1 {
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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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// Remove CPU agents.
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if _, ok := agent.(*CpuAgent); ok {
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delete(self.agents, agent)
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}
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}
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}
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atomic.StoreInt32(&self.mining, 0)
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atomic.StoreInt32(&self.atWork, 0)
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}
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func (self *worker) register(agent Agent) {
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self.mu.Lock()
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defer self.mu.Unlock()
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self.agents[agent] = struct{}{}
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agent.SetReturnCh(self.recv)
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}
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func (self *worker) unregister(agent Agent) {
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self.mu.Lock()
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defer self.mu.Unlock()
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delete(self.agents, agent)
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agent.Stop()
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}
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func (self *worker) update() {
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for event := range self.events.Chan() {
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// A real event arrived, process interesting content
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switch ev := event.Data.(type) {
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case core.ChainHeadEvent:
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self.commitNewWork()
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case core.ChainSideEvent:
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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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case core.TxPreEvent:
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// Apply transaction to the pending state if we're not mining
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if atomic.LoadInt32(&self.mining) == 0 {
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self.currentMu.Lock()
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self.current.commitTransactions(self.mux, types.Transactions{ev.Tx}, self.gasPrice, self.chain)
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self.currentMu.Unlock()
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}
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}
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}
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}
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func newLocalMinedBlock(blockNumber uint64, prevMinedBlocks *uint64RingBuffer) (minedBlocks *uint64RingBuffer) {
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if prevMinedBlocks == nil {
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minedBlocks = &uint64RingBuffer{next: 0, ints: make([]uint64, miningLogAtDepth+1)}
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} else {
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minedBlocks = prevMinedBlocks
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}
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minedBlocks.ints[minedBlocks.next] = blockNumber
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minedBlocks.next = (minedBlocks.next + 1) % len(minedBlocks.ints)
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return minedBlocks
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}
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func (self *worker) wait() {
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for {
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for result := range self.recv {
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atomic.AddInt32(&self.atWork, -1)
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if result == nil {
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continue
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}
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block := result.Block
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work := result.Work
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if self.fullValidation {
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if _, err := self.chain.InsertChain(types.Blocks{block}); err != nil {
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glog.V(logger.Error).Infoln("mining err", err)
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continue
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}
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go self.mux.Post(core.NewMinedBlockEvent{Block: block})
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} else {
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work.state.Commit()
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parent := self.chain.GetBlock(block.ParentHash())
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if parent == nil {
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glog.V(logger.Error).Infoln("Invalid block found during mining")
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continue
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}
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auxValidator := self.eth.BlockChain().AuxValidator()
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if err := core.ValidateHeader(self.config, auxValidator, block.Header(), parent.Header(), true, false); err != nil && err != core.BlockFutureErr {
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glog.V(logger.Error).Infoln("Invalid header on mined block:", err)
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continue
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}
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stat, err := self.chain.WriteBlock(block)
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if err != nil {
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glog.V(logger.Error).Infoln("error writing block to chain", err)
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continue
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}
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// update block hash since it is now available and not when the receipt/log of individual transactions were created
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for _, r := range work.receipts {
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for _, l := range r.Logs {
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l.BlockHash = block.Hash()
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}
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}
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for _, log := range work.state.Logs() {
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log.BlockHash = block.Hash()
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}
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// check if canon block and write transactions
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if stat == core.CanonStatTy {
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// This puts transactions in a extra db for rpc
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core.WriteTransactions(self.chainDb, block)
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// store the receipts
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core.WriteReceipts(self.chainDb, work.receipts)
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// Write map map bloom filters
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core.WriteMipmapBloom(self.chainDb, block.NumberU64(), work.receipts)
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}
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// broadcast before waiting for validation
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go func(block *types.Block, logs vm.Logs, receipts []*types.Receipt) {
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self.mux.Post(core.NewMinedBlockEvent{Block: block})
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self.mux.Post(core.ChainEvent{Block: block, Hash: block.Hash(), Logs: logs})
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if stat == core.CanonStatTy {
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self.mux.Post(core.ChainHeadEvent{Block: block})
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self.mux.Post(logs)
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}
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if err := core.WriteBlockReceipts(self.chainDb, block.Hash(), receipts); err != nil {
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glog.V(logger.Warn).Infoln("error writing block receipts:", err)
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}
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}(block, work.state.Logs(), work.receipts)
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}
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// check staleness and display confirmation
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var stale, confirm string
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canonBlock := self.chain.GetBlockByNumber(block.NumberU64())
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if canonBlock != nil && canonBlock.Hash() != block.Hash() {
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stale = "stale "
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} else {
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confirm = "Wait 5 blocks for confirmation"
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work.localMinedBlocks = newLocalMinedBlock(block.Number().Uint64(), work.localMinedBlocks)
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}
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glog.V(logger.Info).Infof("🔨 Mined %sblock (#%v / %x). %s", stale, block.Number(), block.Hash().Bytes()[:4], confirm)
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self.commitNewWork()
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}
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}
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}
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// push sends a new work task to currently live miner agents.
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func (self *worker) push(work *Work) {
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if atomic.LoadInt32(&self.mining) != 1 {
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return
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}
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for agent := range self.agents {
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atomic.AddInt32(&self.atWork, 1)
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if ch := agent.Work(); ch != nil {
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ch <- work
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}
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}
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}
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// makeCurrent creates a new environment for the current cycle.
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func (self *worker) makeCurrent(parent *types.Block, header *types.Header) error {
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state, err := state.New(parent.Root(), self.eth.ChainDb())
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if err != nil {
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return err
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}
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work := &Work{
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config: self.config,
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state: state,
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ancestors: set.New(),
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family: set.New(),
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uncles: set.New(),
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header: header,
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createdAt: time.Now(),
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}
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// when 08 is processed ancestors contain 07 (quick block)
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for _, ancestor := range self.chain.GetBlocksFromHash(parent.Hash(), 7) {
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for _, uncle := range ancestor.Uncles() {
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work.family.Add(uncle.Hash())
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}
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work.family.Add(ancestor.Hash())
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work.ancestors.Add(ancestor.Hash())
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}
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accounts := self.eth.AccountManager().Accounts()
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// Keep track of transactions which return errors so they can be removed
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work.remove = set.New()
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work.tcount = 0
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work.ignoredTransactors = set.New()
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work.lowGasTransactors = set.New()
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work.ownedAccounts = accountAddressesSet(accounts)
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if self.current != nil {
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work.localMinedBlocks = self.current.localMinedBlocks
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}
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self.current = work
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return nil
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}
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func (w *worker) setGasPrice(p *big.Int) {
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w.mu.Lock()
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defer w.mu.Unlock()
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// calculate the minimal gas price the miner accepts when sorting out transactions.
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const pct = int64(90)
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w.gasPrice = gasprice(p, pct)
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w.mux.Post(core.GasPriceChanged{Price: w.gasPrice})
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}
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func (self *worker) isBlockLocallyMined(current *Work, deepBlockNum uint64) bool {
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//Did this instance mine a block at {deepBlockNum} ?
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var isLocal = false
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for idx, blockNum := range current.localMinedBlocks.ints {
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if deepBlockNum == blockNum {
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isLocal = true
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current.localMinedBlocks.ints[idx] = 0 //prevent showing duplicate logs
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break
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}
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}
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//Short-circuit on false, because the previous and following tests must both be true
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if !isLocal {
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return false
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}
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//Does the block at {deepBlockNum} send earnings to my coinbase?
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var block = self.chain.GetBlockByNumber(deepBlockNum)
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return block != nil && block.Coinbase() == self.coinbase
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}
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func (self *worker) logLocalMinedBlocks(current, previous *Work) {
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if previous != nil && current.localMinedBlocks != nil {
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nextBlockNum := current.Block.NumberU64()
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for checkBlockNum := previous.Block.NumberU64(); checkBlockNum < nextBlockNum; checkBlockNum++ {
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inspectBlockNum := checkBlockNum - miningLogAtDepth
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if self.isBlockLocallyMined(current, inspectBlockNum) {
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glog.V(logger.Info).Infof("🔨 🔗 Mined %d blocks back: block #%v", miningLogAtDepth, inspectBlockNum)
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}
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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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self.uncleMu.Lock()
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defer self.uncleMu.Unlock()
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self.currentMu.Lock()
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defer self.currentMu.Unlock()
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tstart := time.Now()
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parent := self.chain.CurrentBlock()
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tstamp := tstart.Unix()
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if parent.Time().Cmp(new(big.Int).SetInt64(tstamp)) >= 0 {
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tstamp = parent.Time().Int64() + 1
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}
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// this will ensure we're not going off too far in the future
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if now := time.Now().Unix(); tstamp > now+4 {
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wait := time.Duration(tstamp-now) * time.Second
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glog.V(logger.Info).Infoln("We are too far in the future. Waiting for", wait)
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time.Sleep(wait)
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}
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num := parent.Number()
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header := &types.Header{
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ParentHash: parent.Hash(),
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Number: num.Add(num, common.Big1),
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Difficulty: core.CalcDifficulty(self.config, uint64(tstamp), parent.Time().Uint64(), parent.Number(), parent.Difficulty()),
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GasLimit: core.CalcGasLimit(parent),
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GasUsed: new(big.Int),
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Coinbase: self.coinbase,
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Extra: self.extra,
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Time: big.NewInt(tstamp),
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}
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// If we are care about TheDAO hard-fork check whether to override the extra-data or not
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if daoBlock := self.config.DAOForkBlock; daoBlock != nil {
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// Check whether the block is among the fork extra-override range
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limit := new(big.Int).Add(daoBlock, params.DAOForkExtraRange)
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if header.Number.Cmp(daoBlock) >= 0 && header.Number.Cmp(limit) < 0 {
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// Depending whether we support or oppose the fork, override differently
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if self.config.DAOForkSupport {
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header.Extra = common.CopyBytes(params.DAOForkBlockExtra)
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} else if bytes.Compare(header.Extra, params.DAOForkBlockExtra) == 0 {
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header.Extra = []byte{} // If miner opposes, don't let it use the reserved extra-data
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}
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}
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}
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previous := self.current
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// Could potentially happen if starting to mine in an odd state.
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err := self.makeCurrent(parent, header)
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if err != nil {
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glog.V(logger.Info).Infoln("Could not create new env for mining, retrying on next block.")
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return
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}
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// Create the current work task and check any fork transitions needed
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work := self.current
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if self.config.DAOForkSupport && self.config.DAOForkBlock != nil && self.config.DAOForkBlock.Cmp(header.Number) == 0 {
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core.ApplyDAOHardFork(work.state)
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}
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/* //approach 1
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transactions := self.eth.TxPool().GetTransactions()
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sort.Sort(types.TxByNonce(transactions))
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*/
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//approach 2
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transactions := self.eth.TxPool().GetTransactions()
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types.SortByPriceAndNonce(transactions)
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/* // approach 3
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// commit transactions for this run.
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txPerOwner := make(map[common.Address]types.Transactions)
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// Sort transactions by owner
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for _, tx := range self.eth.TxPool().GetTransactions() {
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from, _ := tx.From() // we can ignore the sender error
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txPerOwner[from] = append(txPerOwner[from], tx)
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}
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var (
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singleTxOwner types.Transactions
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multiTxOwner types.Transactions
|
|
)
|
|
// Categorise transactions by
|
|
// 1. 1 owner tx per block
|
|
// 2. multi txs owner per block
|
|
for _, txs := range txPerOwner {
|
|
if len(txs) == 1 {
|
|
singleTxOwner = append(singleTxOwner, txs[0])
|
|
} else {
|
|
multiTxOwner = append(multiTxOwner, txs...)
|
|
}
|
|
}
|
|
sort.Sort(types.TxByPrice(singleTxOwner))
|
|
sort.Sort(types.TxByNonce(multiTxOwner))
|
|
transactions := append(singleTxOwner, multiTxOwner...)
|
|
*/
|
|
|
|
work.commitTransactions(self.mux, transactions, self.gasPrice, self.chain)
|
|
self.eth.TxPool().RemoveTransactions(work.lowGasTxs)
|
|
|
|
// compute uncles for the new block.
|
|
var (
|
|
uncles []*types.Header
|
|
badUncles []common.Hash
|
|
)
|
|
for hash, uncle := range self.possibleUncles {
|
|
if len(uncles) == 2 {
|
|
break
|
|
}
|
|
if err := self.commitUncle(work, uncle.Header()); err != nil {
|
|
if glog.V(logger.Ridiculousness) {
|
|
glog.V(logger.Detail).Infof("Bad uncle found and will be removed (%x)\n", hash[:4])
|
|
glog.V(logger.Detail).Infoln(uncle)
|
|
}
|
|
badUncles = append(badUncles, hash)
|
|
} else {
|
|
glog.V(logger.Debug).Infof("commiting %x as uncle\n", hash[:4])
|
|
uncles = append(uncles, uncle.Header())
|
|
}
|
|
}
|
|
for _, hash := range badUncles {
|
|
delete(self.possibleUncles, hash)
|
|
}
|
|
|
|
if atomic.LoadInt32(&self.mining) == 1 {
|
|
// commit state root after all state transitions.
|
|
core.AccumulateRewards(work.state, header, uncles)
|
|
header.Root = work.state.IntermediateRoot()
|
|
}
|
|
|
|
// create the new block whose nonce will be mined.
|
|
work.Block = types.NewBlock(header, work.txs, uncles, work.receipts)
|
|
|
|
// We only care about logging if we're actually mining.
|
|
if atomic.LoadInt32(&self.mining) == 1 {
|
|
glog.V(logger.Info).Infof("commit new work on block %v with %d txs & %d uncles. Took %v\n", work.Block.Number(), work.tcount, len(uncles), time.Since(tstart))
|
|
self.logLocalMinedBlocks(work, previous)
|
|
}
|
|
self.push(work)
|
|
}
|
|
|
|
func (self *worker) commitUncle(work *Work, uncle *types.Header) error {
|
|
hash := uncle.Hash()
|
|
if work.uncles.Has(hash) {
|
|
return core.UncleError("Uncle not unique")
|
|
}
|
|
if !work.ancestors.Has(uncle.ParentHash) {
|
|
return core.UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
|
|
}
|
|
if work.family.Has(hash) {
|
|
return core.UncleError(fmt.Sprintf("Uncle already in family (%x)", hash))
|
|
}
|
|
work.uncles.Add(uncle.Hash())
|
|
return nil
|
|
}
|
|
|
|
func (env *Work) commitTransactions(mux *event.TypeMux, transactions types.Transactions, gasPrice *big.Int, bc *core.BlockChain) {
|
|
gp := new(core.GasPool).AddGas(env.header.GasLimit)
|
|
|
|
var coalescedLogs vm.Logs
|
|
for _, tx := range transactions {
|
|
// Error may be ignored here. The error has already been checked
|
|
// during transaction acceptance is the transaction pool.
|
|
from, _ := tx.From()
|
|
|
|
// Check if it falls within margin. Txs from owned accounts are always processed.
|
|
if tx.GasPrice().Cmp(gasPrice) < 0 && !env.ownedAccounts.Has(from) {
|
|
// ignore the transaction and transactor. We ignore the transactor
|
|
// because nonce will fail after ignoring this transaction so there's
|
|
// no point
|
|
env.lowGasTransactors.Add(from)
|
|
|
|
glog.V(logger.Info).Infof("transaction(%x) below gas price (tx=%v ask=%v). All sequential txs from this address(%x) will be ignored\n", tx.Hash().Bytes()[:4], common.CurrencyToString(tx.GasPrice()), common.CurrencyToString(gasPrice), from[:4])
|
|
}
|
|
|
|
// Continue with the next transaction if the transaction sender is included in
|
|
// the low gas tx set. This will also remove the tx and all sequential transaction
|
|
// from this transactor
|
|
if env.lowGasTransactors.Has(from) {
|
|
// add tx to the low gas set. This will be removed at the end of the run
|
|
// owned accounts are ignored
|
|
if !env.ownedAccounts.Has(from) {
|
|
env.lowGasTxs = append(env.lowGasTxs, tx)
|
|
}
|
|
continue
|
|
}
|
|
|
|
// Move on to the next transaction when the transactor is in ignored transactions set
|
|
// This may occur when a transaction hits the gas limit. When a gas limit is hit and
|
|
// the transaction is processed (that could potentially be included in the block) it
|
|
// will throw a nonce error because the previous transaction hasn't been processed.
|
|
// Therefor we need to ignore any transaction after the ignored one.
|
|
if env.ignoredTransactors.Has(from) {
|
|
continue
|
|
}
|
|
|
|
env.state.StartRecord(tx.Hash(), common.Hash{}, 0)
|
|
|
|
err, logs := env.commitTransaction(tx, bc, gp)
|
|
switch {
|
|
case core.IsGasLimitErr(err):
|
|
// ignore the transactor so no nonce errors will be thrown for this account
|
|
// next time the worker is run, they'll be picked up again.
|
|
env.ignoredTransactors.Add(from)
|
|
|
|
glog.V(logger.Detail).Infof("Gas limit reached for (%x) in this block. Continue to try smaller txs\n", from[:4])
|
|
case err != nil:
|
|
env.remove.Add(tx.Hash())
|
|
|
|
if glog.V(logger.Detail) {
|
|
glog.Infof("TX (%x) failed, will be removed: %v\n", tx.Hash().Bytes()[:4], err)
|
|
}
|
|
default:
|
|
env.tcount++
|
|
coalescedLogs = append(coalescedLogs, logs...)
|
|
}
|
|
}
|
|
if len(coalescedLogs) > 0 || env.tcount > 0 {
|
|
go func(logs vm.Logs, tcount int) {
|
|
if len(logs) > 0 {
|
|
mux.Post(core.PendingLogsEvent{Logs: logs})
|
|
}
|
|
if tcount > 0 {
|
|
mux.Post(core.PendingStateEvent{})
|
|
}
|
|
}(coalescedLogs, env.tcount)
|
|
}
|
|
}
|
|
|
|
func (env *Work) commitTransaction(tx *types.Transaction, bc *core.BlockChain, gp *core.GasPool) (error, vm.Logs) {
|
|
snap := env.state.Copy()
|
|
|
|
// this is a bit of a hack to force jit for the miners
|
|
config := env.config.VmConfig
|
|
if !(config.EnableJit && config.ForceJit) {
|
|
config.EnableJit = false
|
|
}
|
|
config.ForceJit = false // disable forcing jit
|
|
|
|
receipt, logs, _, err := core.ApplyTransaction(env.config, bc, gp, env.state, env.header, tx, env.header.GasUsed, config)
|
|
if err != nil {
|
|
env.state.Set(snap)
|
|
return err, nil
|
|
}
|
|
env.txs = append(env.txs, tx)
|
|
env.receipts = append(env.receipts, receipt)
|
|
|
|
return nil, logs
|
|
}
|
|
|
|
// TODO: remove or use
|
|
func (self *worker) HashRate() int64 {
|
|
return 0
|
|
}
|
|
|
|
// gasprice calculates a reduced gas price based on the pct
|
|
// XXX Use big.Rat?
|
|
func gasprice(price *big.Int, pct int64) *big.Int {
|
|
p := new(big.Int).Set(price)
|
|
p.Div(p, big.NewInt(100))
|
|
p.Mul(p, big.NewInt(pct))
|
|
return p
|
|
}
|
|
|
|
func accountAddressesSet(accounts []accounts.Account) *set.Set {
|
|
accountSet := set.New()
|
|
for _, account := range accounts {
|
|
accountSet.Add(account.Address)
|
|
}
|
|
return accountSet
|
|
}
|