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package miner
import (
"fmt"
"math/big"
"sort"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/state"
"gopkg.in/fatih/set.v0"
)
type environment struct {
totalUsedGas *big.Int
state *state.StateDB
coinbase *state.StateObject
block *types.Block
ancestors *set.Set
uncles *set.Set
}
func env(block *types.Block, eth *eth.Ethereum) *environment {
state := state.New(block.Root(), eth.Db())
env := &environment{
totalUsedGas: new(big.Int),
state: state,
block: block,
ancestors: set.New(),
uncles: set.New(),
coinbase: state.GetOrNewStateObject(block.Coinbase()),
}
for _, ancestor := range eth.ChainManager().GetAncestors(block, 7) {
env.ancestors.Add(string(ancestor.Hash()))
}
return env
}
type worker struct {
agents []chan<- *types.Block
mux *event.TypeMux
quit chan struct{}
pow pow.PoW
eth *eth.Ethereum
chain *core.ChainManager
proc *core.BlockProcessor
coinbase []byte
current *environment
}
func (self *worker) register(agent chan<- *types.Block) {
self.agents = append(self.agents, agent)
}
func (self *worker) update() {
events := self.mux.Subscribe(core.NewBlockEvent{}, core.TxPreEvent{}, &LocalTx{})
out:
for {
select {
case event := <-events.Chan():
switch event := event.(type) {
case core.NewBlockEvent:
block := event.Block
if self.eth.ChainManager().HasBlock(block.Hash()) {
} else if true {
}
case core.TxPreEvent, *LocalTx:
}
case <-self.quit:
break out
}
}
}
func (self *worker) commit() {
self.current.state.Update(ethutil.Big0)
self.current.block.SetRoot(self.current.state.Root())
for _, agent := range self.agents {
agent <- self.current.block
}
}
func (self *worker) commitNewWork() {
self.current = env(self.chain.NewBlock(self.coinbase), self.eth)
parent := self.chain.GetBlock(self.current.block.ParentHash())
self.current.coinbase.SetGasPool(core.CalcGasLimit(parent, self.current.block))
transactions := self.eth.TxPool().GetTransactions()
sort.Sort(types.TxByNonce{transactions})
// Keep track of transactions which return errors so they can be removed
var remove types.Transactions
for _, tx := range transactions {
err := self.commitTransaction(tx)
switch {
case core.IsNonceErr(err):
remove = append(remove, tx)
case core.IsGasLimitErr(err):
// ignore
default:
minerlogger.Infoln(err)
remove = append(remove, tx)
}
}
self.eth.TxPool().RemoveSet(remove)
self.current.coinbase.AddAmount(core.BlockReward)
self.commit()
}
var (
inclusionReward = new(big.Int).Div(core.BlockReward, big.NewInt(32))
_uncleReward = new(big.Int).Mul(core.BlockReward, big.NewInt(15))
uncleReward = new(big.Int).Div(_uncleReward, big.NewInt(16))
)
func (self *worker) commitUncle(uncle *types.Header) error {
if self.current.uncles.Has(string(uncle.Hash())) {
// Error not unique
return core.UncleError("Uncle not unique")
}
self.current.uncles.Add(string(uncle.Hash()))
if !self.current.ancestors.Has(string(uncle.ParentHash)) {
return core.UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
}
if !self.pow.Verify(types.NewBlockWithHeader(uncle)) {
return core.ValidationError("Uncle's nonce is invalid (= %v)", ethutil.Bytes2Hex(uncle.Nonce))
}
uncleAccount := self.current.state.GetAccount(uncle.Coinbase)
uncleAccount.AddAmount(uncleReward)
self.current.coinbase.AddBalance(uncleReward)
return nil
}
func (self *worker) commitTransaction(tx *types.Transaction) error {
snapshot := self.current.state.Copy()
receipt, txGas, err := self.proc.ApplyTransaction(self.current.coinbase, self.current.state, self.current.block, tx, self.current.totalUsedGas, true)
if err != nil {
self.current.state.Set(snapshot)
return err
}
self.current.totalUsedGas.Add(self.current.totalUsedGas, txGas)
self.current.block.AddTransaction(tx)
self.current.block.AddReceipt(receipt)
return nil
}
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