mirror of https://github.com/poanetwork/quorum.git
144 lines
5.0 KiB
Go
144 lines
5.0 KiB
Go
package ethminer
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import (
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"bytes"
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"github.com/ethereum/eth-go/ethchain"
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"github.com/ethereum/eth-go/ethutil"
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"github.com/ethereum/eth-go/ethwire"
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)
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type Miner struct {
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pow ethchain.PoW
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ethereum ethchain.EthManager
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coinbase []byte
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reactChan chan ethutil.React
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txs []*ethchain.Transaction
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uncles []*ethchain.Block
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block *ethchain.Block
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powChan chan []byte
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quitChan chan ethutil.React
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}
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func NewDefaultMiner(coinbase []byte, ethereum ethchain.EthManager) Miner {
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reactChan := make(chan ethutil.React, 1) // This is the channel that receives 'updates' when ever a new transaction or block comes in
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powChan := make(chan []byte, 1) // This is the channel that receives valid sha hases for a given block
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quitChan := make(chan ethutil.React, 1) // This is the channel that can exit the miner thread
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ethereum.Reactor().Subscribe("newBlock", reactChan)
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ethereum.Reactor().Subscribe("newTx:pre", reactChan)
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// We need the quit chan to be a Reactor event.
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// The POW search method is actually blocking and if we don't
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// listen to the reactor events inside of the pow itself
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// The miner overseer will never get the reactor events themselves
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// Only after the miner will find the sha
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ethereum.Reactor().Subscribe("newBlock", quitChan)
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ethereum.Reactor().Subscribe("newTx:pre", quitChan)
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miner := Miner{
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pow: ðchain.EasyPow{},
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ethereum: ethereum,
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coinbase: coinbase,
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reactChan: reactChan,
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powChan: powChan,
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quitChan: quitChan,
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}
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// Insert initial TXs in our little miner 'pool'
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miner.txs = ethereum.TxPool().Flush()
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miner.block = ethereum.BlockChain().NewBlock(miner.coinbase, miner.txs)
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return miner
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}
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func (miner *Miner) Start() {
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// Prepare inital block
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//miner.ethereum.StateManager().Prepare(miner.block.State(), miner.block.State())
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go miner.listener()
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}
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func (miner *Miner) listener() {
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for {
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select {
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case chanMessage := <-miner.reactChan:
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if block, ok := chanMessage.Resource.(*ethchain.Block); ok {
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ethutil.Config.Log.Infoln("[MINER] Got new block via Reactor")
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if bytes.Compare(miner.ethereum.BlockChain().CurrentBlock.Hash(), block.Hash()) == 0 {
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// TODO: Perhaps continue mining to get some uncle rewards
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ethutil.Config.Log.Infoln("[MINER] New top block found resetting state")
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// Filter out which Transactions we have that were not in this block
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var newtxs []*ethchain.Transaction
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for _, tx := range miner.txs {
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found := false
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for _, othertx := range block.Transactions() {
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if bytes.Compare(tx.Hash(), othertx.Hash()) == 0 {
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found = true
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}
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}
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if found == false {
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newtxs = append(newtxs, tx)
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}
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}
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miner.txs = newtxs
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// Setup a fresh state to mine on
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miner.block = miner.ethereum.BlockChain().NewBlock(miner.coinbase, miner.txs)
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} else {
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if bytes.Compare(block.PrevHash, miner.ethereum.BlockChain().CurrentBlock.PrevHash) == 0 {
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ethutil.Config.Log.Infoln("[MINER] Adding uncle block")
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miner.uncles = append(miner.uncles, block)
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//miner.ethereum.StateManager().Prepare(miner.block.State(), miner.block.State())
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}
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}
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}
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if tx, ok := chanMessage.Resource.(*ethchain.Transaction); ok {
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//log.Infoln("[MINER] Got new transaction from Reactor", tx)
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found := false
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for _, ctx := range miner.txs {
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if found = bytes.Compare(ctx.Hash(), tx.Hash()) == 0; found {
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break
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}
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}
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if found == false {
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//log.Infoln("[MINER] We did not know about this transaction, adding")
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miner.txs = append(miner.txs, tx)
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miner.block = miner.ethereum.BlockChain().NewBlock(miner.coinbase, miner.txs)
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miner.block.SetTransactions(miner.txs)
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} else {
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//log.Infoln("[MINER] We already had this transaction, ignoring")
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}
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}
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default:
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ethutil.Config.Log.Infoln("[MINER] Mining on block. Includes", len(miner.txs), "transactions")
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// Apply uncles
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if len(miner.uncles) > 0 {
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miner.block.SetUncles(miner.uncles)
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}
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// Apply all transactions to the block
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miner.ethereum.StateManager().ApplyTransactions(miner.block.State(), miner.block, miner.block.Transactions())
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miner.ethereum.StateManager().AccumelateRewards(miner.block.State(), miner.block)
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// Search the nonce
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miner.block.Nonce = miner.pow.Search(miner.block, miner.quitChan)
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if miner.block.Nonce != nil {
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err := miner.ethereum.StateManager().ProcessBlock(miner.ethereum.StateManager().CurrentState(), miner.block, true)
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if err != nil {
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ethutil.Config.Log.Infoln(err)
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miner.txs = []*ethchain.Transaction{} // Move this somewhere neat
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miner.block = miner.ethereum.BlockChain().NewBlock(miner.coinbase, miner.txs)
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} else {
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miner.ethereum.Broadcast(ethwire.MsgBlockTy, []interface{}{miner.block.Value().Val})
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ethutil.Config.Log.Infof("[MINER] 🔨 Mined block %x\n", miner.block.Hash())
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miner.txs = []*ethchain.Transaction{} // Move this somewhere neat
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miner.block = miner.ethereum.BlockChain().NewBlock(miner.coinbase, miner.txs)
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}
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}
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}
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}
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}
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