mirror of https://github.com/poanetwork/quorum.git
336 lines
9.3 KiB
Go
336 lines
9.3 KiB
Go
package ethchain
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import (
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"bytes"
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"fmt"
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"github.com/ethereum/eth-go/ethutil"
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"github.com/ethereum/eth-go/ethwire"
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"math/big"
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"sync"
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"time"
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)
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type BlockProcessor interface {
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ProcessBlock(block *Block)
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}
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type EthManager interface {
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StateManager() *StateManager
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BlockChain() *BlockChain
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TxPool() *TxPool
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Broadcast(msgType ethwire.MsgType, data []interface{})
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Reactor() *ethutil.ReactorEngine
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}
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type StateManager struct {
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// Mutex for locking the block processor. Blocks can only be handled one at a time
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mutex sync.Mutex
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// Canonical block chain
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bc *BlockChain
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// States for addresses. You can watch any address
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// at any given time
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addrStateStore *AddrStateStore
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// Stack for processing contracts
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stack *Stack
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// non-persistent key/value memory storage
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mem map[string]*big.Int
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Pow PoW
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Ethereum EthManager
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SecondaryBlockProcessor BlockProcessor
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// The managed states
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// Processor state. Anything processed will be applied to this
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// state
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procState *State
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// Comparative state it used for comparing and validating end
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// results
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compState *State
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// Mining state, solely used for mining
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miningState *State
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}
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func NewStateManager(ethereum EthManager) *StateManager {
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sm := &StateManager{
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stack: NewStack(),
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mem: make(map[string]*big.Int),
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Pow: &EasyPow{},
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Ethereum: ethereum,
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addrStateStore: NewAddrStateStore(),
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bc: ethereum.BlockChain(),
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}
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sm.procState = ethereum.BlockChain().CurrentBlock.State()
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return sm
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}
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func (sm *StateManager) ProcState() *State {
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return sm.procState
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}
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func (sm *StateManager) MiningState() *State {
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return sm.miningState
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}
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// Watches any given address and puts it in the address state store
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func (sm *StateManager) WatchAddr(addr []byte) *AccountState {
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//XXX account := sm.bc.CurrentBlock.state.GetAccount(addr)
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account := sm.procState.GetAccount(addr)
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return sm.addrStateStore.Add(addr, account)
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}
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func (sm *StateManager) GetAddrState(addr []byte) *AccountState {
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account := sm.addrStateStore.Get(addr)
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if account == nil {
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a := sm.bc.CurrentBlock.state.GetAccount(addr)
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account = &AccountState{Nonce: a.Nonce, Account: a}
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}
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return account
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}
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func (sm *StateManager) BlockChain() *BlockChain {
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return sm.bc
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}
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func (sm *StateManager) MakeContract(tx *Transaction) {
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contract := MakeContract(tx, sm.procState)
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if contract != nil {
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sm.procState.states[string(tx.Hash()[12:])] = contract.state
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}
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}
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func (sm *StateManager) ApplyTransaction(block *Block, tx *Transaction) {
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}
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func (sm *StateManager) ApplyTransactions(block *Block, txs []*Transaction) {
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// Process each transaction/contract
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for _, tx := range txs {
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// If there's no recipient, it's a contract
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if tx.IsContract() {
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sm.MakeContract(tx)
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//XXX block.MakeContract(tx)
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} else {
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if contract := sm.procState.GetContract(tx.Recipient); contract != nil {
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//XXX if contract := block.state.GetContract(tx.Recipient); contract != nil {
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sm.ProcessContract(contract, tx, block)
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} else {
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err := sm.Ethereum.TxPool().ProcessTransaction(tx, block)
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if err != nil {
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ethutil.Config.Log.Infoln("[STATE]", err)
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}
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}
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}
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}
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}
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// The prepare function, prepares the state manager for the next
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// "ProcessBlock" action.
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func (sm *StateManager) Prepare(processer *State, comparative *State) {
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sm.compState = comparative
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sm.procState = processer
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}
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func (sm *StateManager) PrepareMiningState() {
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sm.miningState = sm.BlockChain().CurrentBlock.State()
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}
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// Default prepare function
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func (sm *StateManager) PrepareDefault(block *Block) {
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sm.Prepare(sm.BlockChain().CurrentBlock.State(), block.State())
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}
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// Block processing and validating with a given (temporarily) state
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func (sm *StateManager) ProcessBlock(block *Block) error {
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// Processing a blocks may never happen simultaneously
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sm.mutex.Lock()
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defer sm.mutex.Unlock()
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// Defer the Undo on the Trie. If the block processing happened
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// we don't want to undo but since undo only happens on dirty
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// nodes this won't happen because Commit would have been called
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// before that.
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defer sm.bc.CurrentBlock.Undo()
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hash := block.Hash()
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if sm.bc.HasBlock(hash) {
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return nil
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}
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// Check if we have the parent hash, if it isn't known we discard it
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// Reasons might be catching up or simply an invalid block
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if !sm.bc.HasBlock(block.PrevHash) && sm.bc.CurrentBlock != nil {
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return ParentError(block.PrevHash)
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}
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// Process the transactions on to current block
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sm.ApplyTransactions(sm.bc.CurrentBlock, block.Transactions())
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// Block validation
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if err := sm.ValidateBlock(block); err != nil {
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return err
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}
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// I'm not sure, but I don't know if there should be thrown
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// any errors at this time.
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if err := sm.AccumelateRewards(block); err != nil {
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return err
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}
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// if !sm.compState.Cmp(sm.procState)
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if !sm.compState.Cmp(sm.procState) {
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//XXX return fmt.Errorf("Invalid merkle root. Expected %x, got %x", block.State().trie.Root, sm.bc.CurrentBlock.State().trie.Root)
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return fmt.Errorf("Invalid merkle root. Expected %x, got %x", sm.compState.trie.Root, sm.procState.trie.Root)
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}
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// Calculate the new total difficulty and sync back to the db
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if sm.CalculateTD(block) {
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// Sync the current block's state to the database and cancelling out the deferred Undo
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//XXX sm.bc.CurrentBlock.Sync()
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sm.procState.Sync()
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// Broadcast the valid block back to the wire
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//sm.Ethereum.Broadcast(ethwire.MsgBlockTy, []interface{}{block.Value().Val})
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// Add the block to the chain
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sm.bc.Add(block)
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// If there's a block processor present, pass in the block for further
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// processing
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if sm.SecondaryBlockProcessor != nil {
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sm.SecondaryBlockProcessor.ProcessBlock(block)
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}
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ethutil.Config.Log.Infof("[STATE] Added block #%d (%x)\n", block.BlockInfo().Number, block.Hash())
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sm.Ethereum.Reactor().Post("newBlock", block)
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} else {
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fmt.Println("total diff failed")
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}
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return nil
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}
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func (sm *StateManager) CalculateTD(block *Block) bool {
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uncleDiff := new(big.Int)
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for _, uncle := range block.Uncles {
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uncleDiff = uncleDiff.Add(uncleDiff, uncle.Difficulty)
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}
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// TD(genesis_block) = 0 and TD(B) = TD(B.parent) + sum(u.difficulty for u in B.uncles) + B.difficulty
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td := new(big.Int)
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td = td.Add(sm.bc.TD, uncleDiff)
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td = td.Add(td, block.Difficulty)
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// The new TD will only be accepted if the new difficulty is
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// is greater than the previous.
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if td.Cmp(sm.bc.TD) > 0 {
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// Set the new total difficulty back to the block chain
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sm.bc.SetTotalDifficulty(td)
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return true
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}
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return false
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}
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// Validates the current block. Returns an error if the block was invalid,
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// an uncle or anything that isn't on the current block chain.
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// Validation validates easy over difficult (dagger takes longer time = difficult)
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func (sm *StateManager) ValidateBlock(block *Block) error {
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// TODO
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// 2. Check if the difficulty is correct
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// Check each uncle's previous hash. In order for it to be valid
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// is if it has the same block hash as the current
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previousBlock := sm.bc.GetBlock(block.PrevHash)
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for _, uncle := range block.Uncles {
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if bytes.Compare(uncle.PrevHash, previousBlock.PrevHash) != 0 {
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return ValidationError("Mismatch uncle's previous hash. Expected %x, got %x", previousBlock.PrevHash, uncle.PrevHash)
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}
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}
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diff := block.Time - sm.bc.CurrentBlock.Time
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if diff < 0 {
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return ValidationError("Block timestamp less then prev block %v", diff)
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}
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// New blocks must be within the 15 minute range of the last block.
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if diff > int64(15*time.Minute) {
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return ValidationError("Block is too far in the future of last block (> 15 minutes)")
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}
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// Verify the nonce of the block. Return an error if it's not valid
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if !sm.Pow.Verify(block.HashNoNonce(), block.Difficulty, block.Nonce) {
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return ValidationError("Block's nonce is invalid (= %v)", ethutil.Hex(block.Nonce))
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}
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return nil
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}
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func CalculateBlockReward(block *Block, uncleLength int) *big.Int {
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base := new(big.Int)
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for i := 0; i < uncleLength; i++ {
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base.Add(base, UncleInclusionReward)
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}
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return base.Add(base, BlockReward)
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}
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func CalculateUncleReward(block *Block) *big.Int {
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return UncleReward
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}
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func (sm *StateManager) AccumelateRewards(block *Block) error {
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// Get the coinbase rlp data
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//XXX addr := processor.state.GetAccount(block.Coinbase)
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addr := sm.procState.GetAccount(block.Coinbase)
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// Reward amount of ether to the coinbase address
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addr.AddFee(CalculateBlockReward(block, len(block.Uncles)))
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//XXX processor.state.UpdateAccount(block.Coinbase, addr)
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sm.procState.UpdateAccount(block.Coinbase, addr)
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for _, uncle := range block.Uncles {
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uncleAddr := sm.procState.GetAccount(uncle.Coinbase)
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uncleAddr.AddFee(CalculateUncleReward(uncle))
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//processor.state.UpdateAccount(uncle.Coinbase, uncleAddr)
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sm.procState.UpdateAccount(uncle.Coinbase, uncleAddr)
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}
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return nil
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}
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func (sm *StateManager) Stop() {
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sm.bc.Stop()
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}
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func (sm *StateManager) ProcessContract(contract *Contract, tx *Transaction, block *Block) {
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// Recovering function in case the VM had any errors
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/*
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("Recovered from VM execution with err =", r)
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}
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}()
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*/
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vm := &Vm{}
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//vm.Process(contract, block.state, RuntimeVars{
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vm.Process(contract, sm.procState, RuntimeVars{
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address: tx.Hash()[12:],
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blockNumber: block.BlockInfo().Number,
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sender: tx.Sender(),
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prevHash: block.PrevHash,
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coinbase: block.Coinbase,
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time: block.Time,
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diff: block.Difficulty,
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txValue: tx.Value,
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txData: tx.Data,
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})
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}
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