From f59a3b67f69b26f969084e0de165435e80bd8e12 Mon Sep 17 00:00:00 2001 From: obscuren Date: Tue, 4 Nov 2014 10:57:02 +0100 Subject: StateManager => BlockManager --- chain/state_manager.go | 453 ------------------------------------------------- 1 file changed, 453 deletions(-) delete mode 100644 chain/state_manager.go (limited to 'chain/state_manager.go') diff --git a/chain/state_manager.go b/chain/state_manager.go deleted file mode 100644 index 31b77c574..000000000 --- a/chain/state_manager.go +++ /dev/null @@ -1,453 +0,0 @@ -package chain - -import ( - "bytes" - "container/list" - "fmt" - "math/big" - "os" - "sync" - "time" - - "github.com/ethereum/go-ethereum/crypto" - "github.com/ethereum/go-ethereum/ethutil" - "github.com/ethereum/go-ethereum/event" - "github.com/ethereum/go-ethereum/logger" - "github.com/ethereum/go-ethereum/state" - "github.com/ethereum/go-ethereum/wire" -) - -var statelogger = logger.NewLogger("BLOCK") - -type Peer interface { - Inbound() bool - LastSend() time.Time - LastPong() int64 - Host() []byte - Port() uint16 - Version() string - PingTime() string - Connected() *int32 - Caps() *ethutil.Value -} - -type EthManager interface { - StateManager() *StateManager - ChainManager() *ChainManager - TxPool() *TxPool - Broadcast(msgType wire.MsgType, data []interface{}) - PeerCount() int - IsMining() bool - IsListening() bool - Peers() *list.List - KeyManager() *crypto.KeyManager - ClientIdentity() wire.ClientIdentity - Db() ethutil.Database - EventMux() *event.TypeMux -} - -type StateManager struct { - // Mutex for locking the block processor. Blocks can only be handled one at a time - mutex sync.Mutex - // Canonical block chain - bc *ChainManager - // non-persistent key/value memory storage - mem map[string]*big.Int - // Proof of work used for validating - Pow PoW - // The ethereum manager interface - eth EthManager - // The managed states - // Transiently state. The trans state isn't ever saved, validated and - // it could be used for setting account nonces without effecting - // the main states. - transState *state.State - // Mining state. The mining state is used purely and solely by the mining - // operation. - miningState *state.State - - // The last attempted block is mainly used for debugging purposes - // This does not have to be a valid block and will be set during - // 'Process' & canonical validation. - lastAttemptedBlock *Block - - events event.Subscription -} - -func NewStateManager(ethereum EthManager) *StateManager { - sm := &StateManager{ - mem: make(map[string]*big.Int), - Pow: &EasyPow{}, - eth: ethereum, - bc: ethereum.ChainManager(), - } - sm.transState = ethereum.ChainManager().CurrentBlock.State().Copy() - sm.miningState = ethereum.ChainManager().CurrentBlock.State().Copy() - - return sm -} - -func (self *StateManager) Start() { - statelogger.Debugln("Starting state manager") - self.events = self.eth.EventMux().Subscribe(Blocks(nil)) - go self.updateThread() -} - -func (self *StateManager) Stop() { - statelogger.Debugln("Stopping state manager") - self.events.Unsubscribe() -} - -func (self *StateManager) updateThread() { - for ev := range self.events.Chan() { - for _, block := range ev.(Blocks) { - err := self.Process(block) - if err != nil { - statelogger.Infoln(err) - statelogger.Debugf("Block #%v failed (%x...)\n", block.Number, block.Hash()[0:4]) - statelogger.Debugln(block) - break - } - } - } -} - -func (sm *StateManager) CurrentState() *state.State { - return sm.eth.ChainManager().CurrentBlock.State() -} - -func (sm *StateManager) TransState() *state.State { - return sm.transState -} - -func (sm *StateManager) MiningState() *state.State { - return sm.miningState -} - -func (sm *StateManager) NewMiningState() *state.State { - sm.miningState = sm.eth.ChainManager().CurrentBlock.State().Copy() - - return sm.miningState -} - -func (sm *StateManager) ChainManager() *ChainManager { - return sm.bc -} - -func (self *StateManager) ProcessTransactions(coinbase *state.StateObject, state *state.State, block, parent *Block, txs Transactions) (Receipts, Transactions, Transactions, Transactions, error) { - var ( - receipts Receipts - handled, unhandled Transactions - erroneous Transactions - totalUsedGas = big.NewInt(0) - err error - ) - -done: - for i, tx := range txs { - // If we are mining this block and validating we want to set the logs back to 0 - state.EmptyLogs() - - txGas := new(big.Int).Set(tx.Gas) - - cb := state.GetStateObject(coinbase.Address()) - st := NewStateTransition(cb, tx, state, block) - err = st.TransitionState() - if err != nil { - statelogger.Infoln(err) - switch { - case IsNonceErr(err): - err = nil // ignore error - continue - case IsGasLimitErr(err): - unhandled = txs[i:] - - break done - default: - statelogger.Infoln(err) - erroneous = append(erroneous, tx) - err = nil - continue - //return nil, nil, nil, err - } - } - - // Update the state with pending changes - state.Update() - - txGas.Sub(txGas, st.gas) - cumulative := new(big.Int).Set(totalUsedGas.Add(totalUsedGas, txGas)) - //receipt := &Receipt{tx, ethutil.CopyBytes(state.Root().([]byte)), accumelative} - receipt := &Receipt{ethutil.CopyBytes(state.Root().([]byte)), cumulative, LogsBloom(state.Logs()).Bytes(), state.Logs()} - - if i < len(block.Receipts()) { - original := block.Receipts()[i] - if !original.Cmp(receipt) { - if ethutil.Config.Diff { - os.Exit(1) - } - - err := fmt.Errorf("#%d receipt failed (r) %v ~ %x <=> (c) %v ~ %x (%x...)", i+1, original.CumulativeGasUsed, original.PostState[0:4], receipt.CumulativeGasUsed, receipt.PostState[0:4], tx.Hash()[0:4]) - - return nil, nil, nil, nil, err - } - } - - // Notify all subscribers - go self.eth.EventMux().Post(TxPostEvent{tx}) - - receipts = append(receipts, receipt) - handled = append(handled, tx) - - if ethutil.Config.Diff && ethutil.Config.DiffType == "all" { - state.CreateOutputForDiff() - } - } - - parent.GasUsed = totalUsedGas - - return receipts, handled, unhandled, erroneous, err -} - -func (sm *StateManager) Process(block *Block) (err error) { - // Processing a blocks may never happen simultaneously - sm.mutex.Lock() - defer sm.mutex.Unlock() - - if sm.bc.HasBlock(block.Hash()) { - return nil - } - - if !sm.bc.HasBlock(block.PrevHash) { - return ParentError(block.PrevHash) - } - - sm.lastAttemptedBlock = block - - var ( - parent = sm.bc.GetBlock(block.PrevHash) - state = parent.State() - ) - - // Defer the Undo on the Trie. If the block processing happened - // we don't want to undo but since undo only happens on dirty - // nodes this won't happen because Commit would have been called - // before that. - defer state.Reset() - - if ethutil.Config.Diff && ethutil.Config.DiffType == "all" { - fmt.Printf("## %x %x ##\n", block.Hash(), block.Number) - } - - txSha := DeriveSha(block.transactions) - if bytes.Compare(txSha, block.TxSha) != 0 { - return fmt.Errorf("Error validating transaction sha. Received %x, got %x", block.TxSha, txSha) - } - - receipts, err := sm.ApplyDiff(state, parent, block) - if err != nil { - return err - } - - receiptSha := DeriveSha(receipts) - if bytes.Compare(receiptSha, block.ReceiptSha) != 0 { - return fmt.Errorf("Error validating receipt sha. Received %x, got %x", block.ReceiptSha, receiptSha) - } - - // TODO validate bloom - - // Block validation - if err = sm.ValidateBlock(block); err != nil { - statelogger.Errorln("Error validating block:", err) - return err - } - - if err = sm.AccumelateRewards(state, block, parent); err != nil { - statelogger.Errorln("Error accumulating reward", err) - return err - } - - state.Update() - - if !block.State().Cmp(state) { - err = fmt.Errorf("Invalid merkle root.\nrec: %x\nis: %x", block.State().Trie.Root, state.Trie.Root) - return - } - - // Calculate the new total difficulty and sync back to the db - if sm.CalculateTD(block) { - // Sync the current block's state to the database and cancelling out the deferred Undo - state.Sync() - - // Add the block to the chain - sm.bc.Add(block) - - // TODO at this point we should also insert LOGS in to a database - - sm.transState = state.Copy() - - statelogger.Infof("Imported block #%d (%x...)\n", block.Number, block.Hash()[0:4]) - - state.Manifest().Reset() - - sm.eth.TxPool().RemoveSet(block.Transactions()) - } else { - statelogger.Errorln("total diff failed") - } - - return nil -} - -func (sm *StateManager) ApplyDiff(state *state.State, parent, block *Block) (receipts Receipts, err error) { - coinbase := state.GetOrNewStateObject(block.Coinbase) - coinbase.SetGasPool(block.CalcGasLimit(parent)) - - // Process the transactions on to current block - receipts, _, _, _, err = sm.ProcessTransactions(coinbase, state, block, parent, block.Transactions()) - if err != nil { - return nil, err - } - - return receipts, nil -} - -func (sm *StateManager) CalculateTD(block *Block) bool { - uncleDiff := new(big.Int) - for _, uncle := range block.Uncles { - uncleDiff = uncleDiff.Add(uncleDiff, uncle.Difficulty) - } - - // TD(genesis_block) = 0 and TD(B) = TD(B.parent) + sum(u.difficulty for u in B.uncles) + B.difficulty - td := new(big.Int) - td = td.Add(sm.bc.TD, uncleDiff) - td = td.Add(td, block.Difficulty) - - // The new TD will only be accepted if the new difficulty is - // is greater than the previous. - if td.Cmp(sm.bc.TD) > 0 { - // Set the new total difficulty back to the block chain - sm.bc.SetTotalDifficulty(td) - - return true - } - - return false -} - -// Validates the current block. Returns an error if the block was invalid, -// an uncle or anything that isn't on the current block chain. -// Validation validates easy over difficult (dagger takes longer time = difficult) -func (sm *StateManager) ValidateBlock(block *Block) error { - // Check each uncle's previous hash. In order for it to be valid - // is if it has the same block hash as the current - parent := sm.bc.GetBlock(block.PrevHash) - /* - for _, uncle := range block.Uncles { - if bytes.Compare(uncle.PrevHash,parent.PrevHash) != 0 { - return ValidationError("Mismatch uncle's previous hash. Expected %x, got %x",parent.PrevHash, uncle.PrevHash) - } - } - */ - - expd := CalcDifficulty(block, parent) - if expd.Cmp(block.Difficulty) < 0 { - return fmt.Errorf("Difficulty check failed for block %v, %v", block.Difficulty, expd) - } - - diff := block.Time - parent.Time - if diff < 0 { - return ValidationError("Block timestamp less then prev block %v (%v - %v)", diff, block.Time, sm.bc.CurrentBlock.Time) - } - - /* XXX - // New blocks must be within the 15 minute range of the last block. - if diff > int64(15*time.Minute) { - return ValidationError("Block is too far in the future of last block (> 15 minutes)") - } - */ - - // Verify the nonce of the block. Return an error if it's not valid - if !sm.Pow.Verify(block.HashNoNonce(), block.Difficulty, block.Nonce) { - return ValidationError("Block's nonce is invalid (= %v)", ethutil.Bytes2Hex(block.Nonce)) - } - - return nil -} - -func (sm *StateManager) AccumelateRewards(state *state.State, block, parent *Block) error { - reward := new(big.Int).Set(BlockReward) - - knownUncles := ethutil.Set(parent.Uncles) - nonces := ethutil.NewSet(block.Nonce) - for _, uncle := range block.Uncles { - if nonces.Include(uncle.Nonce) { - // Error not unique - return UncleError("Uncle not unique") - } - - uncleParent := sm.bc.GetBlock(uncle.PrevHash) - if uncleParent == nil { - return UncleError("Uncle's parent unknown") - } - - if uncleParent.Number.Cmp(new(big.Int).Sub(parent.Number, big.NewInt(6))) < 0 { - return UncleError("Uncle too old") - } - - if knownUncles.Include(uncle.Hash()) { - return UncleError("Uncle in chain") - } - - nonces.Insert(uncle.Nonce) - - r := new(big.Int) - r.Mul(BlockReward, big.NewInt(15)).Div(r, big.NewInt(16)) - - uncleAccount := state.GetAccount(uncle.Coinbase) - uncleAccount.AddAmount(r) - - reward.Add(reward, new(big.Int).Div(BlockReward, big.NewInt(32))) - } - - // Get the account associated with the coinbase - account := state.GetAccount(block.Coinbase) - // Reward amount of ether to the coinbase address - account.AddAmount(reward) - - return nil -} - -// Manifest will handle both creating notifications and generating bloom bin data -func (sm *StateManager) createBloomFilter(state *state.State) *BloomFilter { - bloomf := NewBloomFilter(nil) - - for _, msg := range state.Manifest().Messages { - bloomf.Set(msg.To) - bloomf.Set(msg.From) - } - - sm.eth.EventMux().Post(state.Manifest().Messages) - - return bloomf -} - -func (sm *StateManager) GetMessages(block *Block) (messages []*state.Message, err error) { - if !sm.bc.HasBlock(block.PrevHash) { - return nil, ParentError(block.PrevHash) - } - - sm.lastAttemptedBlock = block - - var ( - parent = sm.bc.GetBlock(block.PrevHash) - state = parent.State().Copy() - ) - - defer state.Reset() - - sm.ApplyDiff(state, parent, block) - - sm.AccumelateRewards(state, block, parent) - - return state.Manifest().Messages, nil -} -- cgit v1.2.3