mirror of https://github.com/ethereum/go-ethereum
Maran
11 years ago
parent
2be2fc7974
commit
ae837c4719
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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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"log" |
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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", 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", 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 func() { 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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log.Println("[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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log.Println("[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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log.Println("[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.Println("[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.Println("[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.SetTransactions(miner.txs) |
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} else { |
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log.Println("[miner] We already had this transaction, ignoring") |
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} |
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} |
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default: |
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log.Println("[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, miner.block.Transactions()) |
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miner.ethereum.StateManager().AccumelateRewards(miner.block) |
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// Search the nonce
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log.Println("[miner] Initialision complete, starting mining") |
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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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miner.ethereum.StateManager().PrepareDefault(miner.block) |
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err := miner.ethereum.StateManager().ProcessBlock(miner.block, true) |
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if err != nil { |
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log.Println("Error result from process block:", err) |
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log.Println(miner.block) |
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} else { |
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if !miner.ethereum.StateManager().Pow.Verify(miner.block.HashNoNonce(), miner.block.Difficulty, miner.block.Nonce) { |
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log.Printf("Second stage verification error: Block's nonce is invalid (= %v)\n", ethutil.Hex(miner.block.Nonce)) |
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} |
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miner.ethereum.Broadcast(ethwire.MsgBlockTy, []interface{}{miner.block.Value().Val}) |
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log.Printf("[miner] 🔨 Mined block %x\n", miner.block.Hash()) |
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log.Println(miner.block) |
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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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