mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-25 12:57:17 +00:00
170 lines
4.2 KiB
Go
170 lines
4.2 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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"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/eth"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/event"
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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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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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ancestors *set.Set
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uncles *set.Set
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}
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func env(block *types.Block, eth *eth.Ethereum) *environment {
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state := state.New(block.Root(), eth.Db())
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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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ancestors: 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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for _, ancestor := range eth.ChainManager().GetAncestors(block, 7) {
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env.ancestors.Add(string(ancestor.Hash()))
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}
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return env
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}
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type Agent interface {
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Comms() chan<- *types.Block
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}
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type worker struct {
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agents []chan<- *types.Block
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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 *eth.Ethereum
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chain *core.ChainManager
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proc *core.BlockProcessor
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coinbase []byte
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current *environment
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}
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func (self *worker) register(agent chan<- *types.Block) {
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self.agents = append(self.agents, agent)
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}
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func (self *worker) update() {
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events := self.mux.Subscribe(core.NewBlockEvent{}, core.TxPreEvent{}, &LocalTx{})
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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 event := event.(type) {
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case core.NewBlockEvent:
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if self.eth.ChainManager().HasBlock(event.Block.Hash()) {
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}
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case core.TxPreEvent:
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if err := self.commitTransaction(event.Tx); err != nil {
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self.commit()
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}
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}
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case <-self.quit:
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break out
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}
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}
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}
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func (self *worker) commit() {
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self.current.state.Update(ethutil.Big0)
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self.current.block.SetRoot(self.current.state.Root())
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for _, agent := range self.agents {
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agent <- self.current.block
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}
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}
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func (self *worker) commitNewWork() {
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self.current = env(self.chain.NewBlock(self.coinbase), self.eth)
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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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// Keep track of transactions which return errors so they can be removed
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var remove types.Transactions
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for _, 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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remove = append(remove, tx)
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case core.IsGasLimitErr(err):
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// ignore
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default:
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minerlogger.Infoln(err)
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remove = append(remove, tx)
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}
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}
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self.eth.TxPool().RemoveSet(remove)
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self.current.coinbase.AddAmount(core.BlockReward)
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self.commit()
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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(string(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(string(uncle.Hash()))
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if !self.current.ancestors.Has(string(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.pow.Verify(types.NewBlockWithHeader(uncle)) {
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return core.ValidationError("Uncle's nonce is invalid (= %v)", ethutil.Bytes2Hex(uncle.Nonce))
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}
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uncleAccount := self.current.state.GetAccount(uncle.Coinbase)
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uncleAccount.AddAmount(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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snapshot := self.current.state.Copy()
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receipt, txGas, 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 {
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self.current.state.Set(snapshot)
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return err
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}
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self.current.totalUsedGas.Add(self.current.totalUsedGas, txGas)
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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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