/*
This file is part of go-ethereum
go-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
go-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with go-ethereum. If not, see .
*/
/**
* @authors
* Jeffrey Wilcke
* @date 2014
*
*/
package miner
import (
"fmt"
"math/big"
"sort"
"github.com/ethereum/c-ethash/go-ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/state"
)
var dx = []byte{0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42}
var dy = []byte{0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43, 0x43}
const epochLen = uint64(1000)
func getSeed(chainMan *core.ChainManager, block *types.Block) (x []byte, y []byte) {
if block.Number().Uint64() == 0 {
return dx, dy
} else if block.Number().Uint64()%epochLen == 0 {
x, y = getSeed(chainMan, chainMan.GetBlock(block.ParentHash()))
if (block.Number().Uint64()/epochLen)%2 > 0 {
y = crypto.Sha3(append(y, block.ParentHash()...))
} else {
x = crypto.Sha3(append(x, block.ParentHash()...))
}
return x, y
} else {
return getSeed(chainMan, chainMan.GetBlock(block.ParentHash()))
}
}
type LocalTx struct {
To []byte `json:"to"`
Data []byte `json:"data"`
Gas string `json:"gas"`
GasPrice string `json:"gasPrice"`
Value string `json:"value"`
}
func (self *LocalTx) Sign(key []byte) *types.Transaction {
return nil
}
var minerlogger = logger.NewLogger("MINER")
type Miner struct {
eth *eth.Ethereum
events event.Subscription
uncles []*types.Header
localTxs map[int]*LocalTx
localTxId int
pow pow.PoW
quitCh chan struct{}
powQuitCh chan struct{}
Coinbase []byte
mining bool
MinAcceptedGasPrice *big.Int
Extra string
}
func New(coinbase []byte, eth *eth.Ethereum) *Miner {
return &Miner{
eth: eth,
powQuitCh: make(chan struct{}),
mining: false,
localTxs: make(map[int]*LocalTx),
MinAcceptedGasPrice: big.NewInt(10000000000000),
Coinbase: coinbase,
}
}
func (self *Miner) GetPow() pow.PoW {
return self.pow
}
func (self *Miner) AddLocalTx(tx *LocalTx) int {
minerlogger.Infof("Added local tx (%x %v / %v)\n", tx.To[0:4], tx.GasPrice, tx.Value)
self.localTxId++
self.localTxs[self.localTxId] = tx
self.eth.EventMux().Post(tx)
return self.localTxId
}
func (self *Miner) RemoveLocalTx(id int) {
if tx := self.localTxs[id]; tx != nil {
minerlogger.Infof("Removed local tx (%x %v / %v)\n", tx.To[0:4], tx.GasPrice, tx.Value)
}
self.eth.EventMux().Post(&LocalTx{})
delete(self.localTxs, id)
}
func (self *Miner) Start() {
if self.mining {
return
}
minerlogger.Infoln("Starting mining operations")
self.mining = true
self.quitCh = make(chan struct{})
self.powQuitCh = make(chan struct{})
mux := self.eth.EventMux()
self.events = mux.Subscribe(core.NewBlockEvent{}, core.TxPreEvent{}, &LocalTx{})
go self.update()
go self.mine()
}
func (self *Miner) Stop() {
if !self.mining {
return
}
self.mining = false
minerlogger.Infoln("Stopping mining operations")
self.events.Unsubscribe()
close(self.quitCh)
close(self.powQuitCh)
}
func (self *Miner) Mining() bool {
return self.mining
}
func (self *Miner) update() {
out:
for {
select {
case event := <-self.events.Chan():
switch event := event.(type) {
case core.NewBlockEvent:
block := event.Block
if self.eth.ChainManager().HasBlock(block.Hash()) {
self.reset()
self.eth.TxPool().RemoveSet(block.Transactions())
go self.mine()
} else if true {
// do uncle stuff
}
case core.TxPreEvent, *LocalTx:
self.reset()
go self.mine()
}
case <-self.quitCh:
break out
}
}
}
func (self *Miner) reset() {
close(self.powQuitCh)
self.powQuitCh = make(chan struct{})
}
func (self *Miner) mine() {
var (
blockProcessor = self.eth.BlockProcessor()
chainMan = self.eth.ChainManager()
block = chainMan.NewBlock(self.Coinbase)
state = state.New(block.Root(), self.eth.Db())
)
block.Header().Extra = self.Extra
// Apply uncles
if len(self.uncles) > 0 {
block.SetUncles(self.uncles)
}
parent := chainMan.GetBlock(block.ParentHash())
coinbase := state.GetOrNewStateObject(block.Coinbase())
coinbase.SetGasPool(core.CalcGasLimit(parent, block))
transactions := self.finiliseTxs()
// Accumulate all valid transactions and apply them to the new state
// Error may be ignored. It's not important during mining
receipts, txs, _, erroneous, err := blockProcessor.ApplyTransactions(coinbase, state, block, transactions, true)
if err != nil {
minerlogger.Debugln(err)
}
self.eth.TxPool().RemoveSet(erroneous)
block.SetTransactions(txs)
block.SetReceipts(receipts)
// Accumulate the rewards included for this block
blockProcessor.AccumelateRewards(state, block, parent)
state.Update(ethutil.Big0)
block.SetRoot(state.Root())
minerlogger.Infof("Mining on block. Includes %v transactions", len(transactions))
x, y := getSeed(chainMan, block)
self.pow, err = ethash.New(append(x, y...), block)
if err != nil {
fmt.Println("err", err)
return
}
// Find a valid nonce
nonce := self.pow.Search(block, self.powQuitCh)
if nonce != nil {
block.Header().Nonce = nonce
err := chainMan.InsertChain(types.Blocks{block})
if err != nil {
minerlogger.Infoln(err)
} else {
self.eth.EventMux().Post(core.NewMinedBlockEvent{block})
minerlogger.Infof("🔨 Mined block %x\n", block.Hash())
minerlogger.Infoln(block)
}
go self.mine()
}
}
func (self *Miner) finiliseTxs() types.Transactions {
// Sort the transactions by nonce in case of odd network propagation
actualSize := len(self.localTxs) // See copy below
txs := make(types.Transactions, actualSize+self.eth.TxPool().Size())
state := self.eth.ChainManager().TransState()
// XXX This has to change. Coinbase is, for new, same as key.
key := self.eth.KeyManager()
for i, ltx := range self.localTxs {
tx := types.NewTransactionMessage(ltx.To, ethutil.Big(ltx.Value), ethutil.Big(ltx.Gas), ethutil.Big(ltx.GasPrice), ltx.Data)
tx.SetNonce(state.GetNonce(self.Coinbase))
state.SetNonce(self.Coinbase, tx.Nonce()+1)
tx.Sign(key.PrivateKey())
txs[i] = tx
}
// Faster than append
for _, tx := range self.eth.TxPool().GetTransactions() {
if tx.GasPrice().Cmp(self.MinAcceptedGasPrice) >= 0 {
txs[actualSize] = tx
actualSize++
}
}
newTransactions := make(types.Transactions, actualSize)
copy(newTransactions, txs[:actualSize])
sort.Sort(types.TxByNonce{newTransactions})
return newTransactions
}