Implemented new miner w/ ui interface for merged mining. Closes #177

* Miner has been rewritten
* Added new miner pane
* Added option for local txs
* Added option to read from MergeMining contract and list them for
  merged mining

chain/block_manager.go

@@ -228,7 +228,7 @@ func (sm *BlockManager) Process(block *Block) (td *big.Int, err error) {
 func (sm *BlockManager) ProcessWithParent(block, parent *Block) (td *big.Int, err error) {
 	sm.lastAttemptedBlock = block
 
-	state := parent.State()
+	state := parent.State().Copy()
 
 	// Defer the Undo on the Trie. If the block processing happened
 	// we don't want to undo but since undo only happens on dirty
@@ -240,20 +240,22 @@ func (sm *BlockManager) ProcessWithParent(block, parent *Block) (td *big.Int, er
 		fmt.Printf("## %x %x ##\n", block.Hash(), block.Number)
 	}
 
+	_, err = sm.ApplyDiff(state, parent, block)
+	if err != nil {
+		return nil, err
+	}
+
+	/* Go and C++ don't have consensus here. FIXME
 	txSha := DeriveSha(block.transactions)
 	if bytes.Compare(txSha, block.TxSha) != 0 {
 		return nil, fmt.Errorf("Error validating transaction sha. Received %x, got %x", block.TxSha, txSha)
 	}
 
-	receipts, err := sm.ApplyDiff(state, parent, block)
-	if err != nil {
-		return nil, err
-	}
-
 	receiptSha := DeriveSha(receipts)
 	if bytes.Compare(receiptSha, block.ReceiptSha) != 0 {
 		return nil, fmt.Errorf("Error validating receipt sha. Received %x, got %x", block.ReceiptSha, receiptSha)
 	}
+	*/
 
 	// Block validation
 	if err = sm.ValidateBlock(block, parent); err != nil {
@@ -374,7 +376,7 @@ func (sm *BlockManager) AccumelateRewards(state *state.State, block, parent *Blo
 
 		uncleParent := sm.bc.GetBlock(uncle.PrevHash)
 		if uncleParent == nil {
-			return UncleError("Uncle's parent unknown")
+			return UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.PrevHash[0:4]))
 		}
 
 		if uncleParent.Number.Cmp(new(big.Int).Sub(parent.Number, big.NewInt(6))) < 0 {

chain/chain_manager.go

@@ -23,6 +23,8 @@ type ChainManager struct {
 
 	CurrentBlock  *Block
 	LastBlockHash []byte
+
+	workingChain *BlockChain
 }
 
 func NewChainManager(ethereum EthManager) *ChainManager {
@@ -225,9 +227,18 @@ func (self *ChainManager) CalcTotalDiff(block *Block) (*big.Int, error) {
 	return td, nil
 }
 
-func (bc *ChainManager) GetBlock(hash []byte) *Block {
+func (self *ChainManager) GetBlock(hash []byte) *Block {
 	data, _ := ethutil.Config.Db.Get(hash)
 	if len(data) == 0 {
+		if self.workingChain != nil {
+			// Check the temp chain
+			for e := self.workingChain.Front(); e != nil; e = e.Next() {
+				if bytes.Compare(e.Value.(*link).block.Hash(), hash) == 0 {
+					return e.Value.(*link).block
+				}
+			}
+		}
+
 		return nil
 	}
 
@@ -310,6 +321,7 @@ func NewChain(blocks Blocks) *BlockChain {
 }
 
 // This function assumes you've done your checking. No checking is done at this stage anymore
+/*
 func (self *ChainManager) InsertChain(chain *BlockChain) {
 	for e := chain.Front(); e != nil; e = e.Next() {
 		link := e.Value.(*link)
@@ -318,8 +330,11 @@ func (self *ChainManager) InsertChain(chain *BlockChain) {
 		self.add(link.block)
 	}
 }
+*/
+
+func (self *ChainManager) TestChain(chain *BlockChain, imp bool) (td *big.Int, err error) {
+	self.workingChain = chain
 
-func (self *ChainManager) TestChain(chain *BlockChain) (td *big.Int, err error) {
 	for e := chain.Front(); e != nil; e = e.Next() {
 		var (
 			l      = e.Value.(*link)
@@ -348,12 +363,21 @@ func (self *ChainManager) TestChain(chain *BlockChain) (td *big.Int, err error)
 			return
 		}
 		l.td = td
+
+		if imp {
+			self.SetTotalDifficulty(td)
+			self.add(block)
+		}
 	}
 
-	if td.Cmp(self.TD) <= 0 {
-		err = &TDError{td, self.TD}
-		return
+	if !imp {
+		if td.Cmp(self.TD) <= 0 {
+			err = &TDError{td, self.TD}
+			return
+		}
 	}
 
+	self.workingChain = nil
+
 	return
 }

chain/dagger.go

@@ -47,6 +47,7 @@ func (pow *EasyPow) Search(block *Block, stop <-chan struct{}) []byte {
 		select {
 		case <-stop:
 			powlogger.Infoln("Breaking from mining")
+			pow.HashRate = 0
 			return nil
 		default:
 			i++
@@ -55,7 +56,7 @@ func (pow *EasyPow) Search(block *Block, stop <-chan struct{}) []byte {
 				elapsed := time.Now().UnixNano() - start
 				hashes := ((float64(1e9) / float64(elapsed)) * float64(i)) / 1000
 				pow.HashRate = int64(hashes)
-				powlogger.Infoln("Hashing @", int64(pow.HashRate), "khash")
+				powlogger.Infoln("Hashing @", pow.HashRate, "khash")
 
 				t = time.Now()
 			}