2014-12-04 01:28:02 -08:00
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package core
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2014-02-14 14:56:09 -08:00
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import (
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"bytes"
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2014-06-30 04:09:04 -07:00
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"fmt"
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2014-08-08 06:36:59 -07:00
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"math/big"
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"sync"
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2015-01-21 15:24:30 -08:00
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"time"
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2014-08-08 06:36:59 -07:00
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2014-12-04 01:28:02 -08:00
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"github.com/ethereum/go-ethereum/core/types"
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2014-10-23 06:01:27 -07:00
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/event"
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2014-10-31 04:56:05 -07:00
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"github.com/ethereum/go-ethereum/logger"
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2014-12-10 07:45:16 -08:00
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"github.com/ethereum/go-ethereum/pow"
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2015-02-09 07:20:34 -08:00
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"github.com/ethereum/go-ethereum/pow/ezp"
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2014-10-31 06:43:14 -07:00
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"github.com/ethereum/go-ethereum/state"
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2014-12-23 04:48:44 -08:00
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"gopkg.in/fatih/set.v0"
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2014-02-14 14:56:09 -08:00
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)
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2015-02-05 11:55:03 -08:00
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type PendingBlockEvent struct {
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Block *types.Block
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}
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2014-10-31 04:56:05 -07:00
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var statelogger = logger.NewLogger("BLOCK")
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2014-06-23 04:54:10 -07:00
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2015-01-04 15:18:44 -08:00
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type BlockProcessor struct {
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2015-01-07 04:17:48 -08:00
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db ethutil.Database
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2014-02-14 14:56:09 -08:00
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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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2014-03-05 01:42:51 -08:00
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// Canonical block chain
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2014-10-20 02:53:11 -07:00
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bc *ChainManager
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2014-02-14 14:56:09 -08:00
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// non-persistent key/value memory storage
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mem map[string]*big.Int
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2014-05-08 09:41:45 -07:00
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// Proof of work used for validating
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2014-12-10 07:45:16 -08:00
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Pow pow.PoW
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2014-12-18 03:18:19 -08:00
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txpool *TxPool
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2014-07-10 06:05:06 -07:00
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// The last attempted block is mainly used for debugging purposes
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// This does not have to be a valid block and will be set during
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// 'Process' & canonical validation.
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2014-11-18 07:58:22 -08:00
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lastAttemptedBlock *types.Block
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2014-09-29 03:57:51 -07:00
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2014-10-13 16:58:31 -07:00
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events event.Subscription
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2014-12-10 11:26:55 -08:00
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eventMux *event.TypeMux
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2014-02-14 14:56:09 -08:00
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}
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2015-01-07 04:17:48 -08:00
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func NewBlockProcessor(db ethutil.Database, txpool *TxPool, chainManager *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
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2015-01-04 15:18:44 -08:00
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sm := &BlockProcessor{
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2015-02-26 09:39:05 -08:00
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db: db,
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mem: make(map[string]*big.Int),
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2015-02-09 07:20:34 -08:00
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Pow: ezp.New(),
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2014-12-18 03:18:19 -08:00
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bc: chainManager,
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eventMux: eventMux,
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txpool: txpool,
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2014-02-14 14:56:09 -08:00
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}
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2014-05-08 09:26:46 -07:00
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2014-03-05 01:57:32 -08:00
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return sm
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2014-02-14 14:56:09 -08:00
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}
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2015-02-22 04:12:01 -08:00
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func (sm *BlockProcessor) TransitionState(statedb *state.StateDB, parent, block *types.Block, transientProcess bool) (receipts types.Receipts, err error) {
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2014-12-23 04:48:44 -08:00
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coinbase := statedb.GetOrNewStateObject(block.Header().Coinbase)
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2015-02-25 11:00:32 -08:00
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coinbase.SetGasPool(block.Header().GasLimit)
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2014-12-02 13:37:45 -08:00
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2015-01-05 02:22:02 -08:00
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// Process the transactions on to parent state
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2015-02-22 04:12:01 -08:00
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receipts, _, _, _, err = sm.ApplyTransactions(coinbase, statedb, block, block.Transactions(), transientProcess)
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2014-12-02 13:37:45 -08:00
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if err != nil {
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return nil, err
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}
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return receipts, nil
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}
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2015-02-19 13:33:22 -08:00
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func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, statedb *state.StateDB, block *types.Block, tx *types.Transaction, usedGas *big.Int, transientProcess bool) (*types.Receipt, *big.Int, error) {
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2015-02-04 05:52:59 -08:00
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// If we are mining this block and validating we want to set the logs back to 0
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2015-02-19 13:33:22 -08:00
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statedb.EmptyLogs()
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2015-02-04 05:52:59 -08:00
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txGas := new(big.Int).Set(tx.Gas())
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2015-02-19 13:33:22 -08:00
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cb := statedb.GetStateObject(coinbase.Address())
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st := NewStateTransition(NewEnv(statedb, self.bc, tx, block), tx, cb)
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2015-02-04 05:52:59 -08:00
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_, err := st.TransitionState()
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2015-02-19 13:33:22 -08:00
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if err != nil && (IsNonceErr(err) || state.IsGasLimitErr(err)) {
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return nil, nil, err
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}
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2015-02-04 05:52:59 -08:00
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txGas.Sub(txGas, st.gas)
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// Update the state with pending changes
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2015-02-19 13:33:22 -08:00
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statedb.Update(txGas)
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2015-02-04 05:52:59 -08:00
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cumulative := new(big.Int).Set(usedGas.Add(usedGas, txGas))
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2015-02-19 13:33:22 -08:00
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receipt := types.NewReceipt(statedb.Root(), cumulative)
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receipt.SetLogs(statedb.Logs())
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2015-02-04 05:52:59 -08:00
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receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
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chainlogger.Debugln(receipt)
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// Notify all subscribers
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if !transientProcess {
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go self.eventMux.Post(TxPostEvent{tx})
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2015-02-26 09:39:05 -08:00
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logs := statedb.Logs()
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go self.eventMux.Post(logs)
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2015-02-04 05:52:59 -08:00
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}
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return receipt, txGas, err
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}
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2015-02-27 17:56:24 -08:00
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func (self *BlockProcessor) ChainManager() *ChainManager {
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return self.bc
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}
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2015-02-04 05:52:59 -08:00
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2015-02-19 13:33:22 -08:00
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func (self *BlockProcessor) ApplyTransactions(coinbase *state.StateObject, statedb *state.StateDB, block *types.Block, txs types.Transactions, transientProcess bool) (types.Receipts, types.Transactions, types.Transactions, types.Transactions, error) {
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2014-06-13 03:45:11 -07:00
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var (
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2014-11-18 07:58:22 -08:00
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receipts types.Receipts
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handled, unhandled types.Transactions
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erroneous types.Transactions
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2014-06-13 03:45:11 -07:00
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totalUsedGas = big.NewInt(0)
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err error
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2014-12-02 13:37:45 -08:00
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cumulativeSum = new(big.Int)
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2014-06-13 03:45:11 -07:00
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)
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2015-02-05 14:42:12 -08:00
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for _, tx := range txs {
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2015-02-19 13:33:22 -08:00
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receipt, txGas, err := self.ApplyTransaction(coinbase, statedb, block, tx, totalUsedGas, transientProcess)
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2014-05-22 08:35:26 -07:00
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if err != nil {
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2014-06-13 03:45:11 -07:00
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switch {
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case IsNonceErr(err):
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2015-02-05 14:42:12 -08:00
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return nil, nil, nil, nil, err
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2015-02-19 13:33:22 -08:00
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case state.IsGasLimitErr(err):
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2015-02-05 14:42:12 -08:00
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return nil, nil, nil, nil, err
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2014-06-13 03:45:11 -07:00
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default:
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2014-06-23 04:54:10 -07:00
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statelogger.Infoln(err)
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2014-10-27 08:52:58 -07:00
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erroneous = append(erroneous, tx)
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2014-07-01 02:26:45 -07:00
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err = nil
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2014-06-13 03:45:11 -07:00
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}
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2014-05-22 08:35:26 -07:00
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}
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receipts = append(receipts, receipt)
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2014-06-13 03:45:11 -07:00
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handled = append(handled, tx)
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2014-07-11 07:04:09 -07:00
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2015-02-04 05:52:59 -08:00
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cumulativeSum.Add(cumulativeSum, new(big.Int).Mul(txGas, tx.GasPrice()))
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2014-05-20 15:17:50 -07:00
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}
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2014-05-22 08:35:26 -07:00
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2014-12-02 13:37:45 -08:00
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block.Reward = cumulativeSum
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2014-12-23 04:48:44 -08:00
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block.Header().GasUsed = totalUsedGas
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2014-06-11 02:40:40 -07:00
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2015-02-05 11:55:03 -08:00
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if transientProcess {
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go self.eventMux.Post(PendingBlockEvent{block})
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}
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2014-10-27 08:52:58 -07:00
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return receipts, handled, unhandled, erroneous, err
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2014-05-20 15:17:50 -07:00
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}
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2015-02-11 14:46:45 -08:00
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// Process block will attempt to process the given block's transactions and applies them
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// on top of the block's parent state (given it exists) and will return wether it was
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// successful or not.
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2015-02-04 15:05:47 -08:00
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func (sm *BlockProcessor) Process(block *types.Block) (td *big.Int, err error) {
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2014-02-14 14:56:09 -08:00
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// Processing a blocks may never happen simultaneously
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2014-03-05 01:57:32 -08:00
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sm.mutex.Lock()
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defer sm.mutex.Unlock()
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2014-02-14 14:56:09 -08:00
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2014-12-23 04:48:44 -08:00
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header := block.Header()
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if sm.bc.HasBlock(header.Hash()) {
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2015-02-04 15:05:47 -08:00
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return nil, &KnownBlockError{header.Number, header.Hash()}
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2014-02-14 14:56:09 -08:00
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}
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2014-12-23 04:48:44 -08:00
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if !sm.bc.HasBlock(header.ParentHash) {
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2015-02-04 15:05:47 -08:00
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return nil, ParentError(header.ParentHash)
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2014-06-23 02:23:18 -07:00
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}
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2014-12-23 04:48:44 -08:00
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parent := sm.bc.GetBlock(header.ParentHash)
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2014-11-04 03:46:33 -08:00
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2015-02-11 14:46:45 -08:00
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return sm.processWithParent(block, parent)
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2014-11-04 03:46:33 -08:00
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}
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2014-06-23 02:23:18 -07:00
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2015-02-11 14:46:45 -08:00
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func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (td *big.Int, err error) {
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2014-07-10 06:05:06 -07:00
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sm.lastAttemptedBlock = block
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2015-02-11 14:46:45 -08:00
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// Create a new state based on the parent's root (e.g., create copy)
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2015-01-07 04:17:48 -08:00
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state := state.New(parent.Root(), sm.db)
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2014-06-23 02:23:18 -07:00
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2014-12-04 06:13:29 -08:00
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// Block validation
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if err = sm.ValidateBlock(block, parent); err != nil {
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return
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2014-07-11 07:04:09 -07:00
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}
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2015-02-22 04:12:01 -08:00
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receipts, err := sm.TransitionState(state, parent, block, false)
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2014-11-07 03:18:48 -08:00
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if err != nil {
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2014-11-10 04:27:24 -08:00
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return
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2014-11-07 03:18:48 -08:00
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}
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2014-12-23 04:48:44 -08:00
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header := block.Header()
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2015-02-11 14:46:45 -08:00
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// Validate the received block's bloom with the one derived from the generated receipts.
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// For valid blocks this should always validate to true.
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2014-12-05 03:32:47 -08:00
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rbloom := types.CreateBloom(receipts)
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2014-12-23 04:48:44 -08:00
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if bytes.Compare(rbloom, header.Bloom) != 0 {
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2014-12-05 03:32:47 -08:00
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err = fmt.Errorf("unable to replicate block's bloom=%x", rbloom)
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return
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}
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2015-02-11 14:46:45 -08:00
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// The transactions Trie's root (R = (Tr [[H1, T1], [H2, T2], ... [Hn, Tn]]))
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// can be used by light clients to make sure they've received the correct Txs
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2014-11-18 07:58:22 -08:00
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txSha := types.DeriveSha(block.Transactions())
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2014-12-23 04:48:44 -08:00
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if bytes.Compare(txSha, header.TxHash) != 0 {
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err = fmt.Errorf("validating transaction root. received=%x got=%x", header.TxHash, txSha)
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2014-11-11 16:36:36 -08:00
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return
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}
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2014-10-29 02:34:40 -07:00
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2015-02-11 14:46:45 -08:00
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// Tre receipt Trie's root (R = (Tr [[H1, R1], ... [Hn, R1]]))
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2014-12-04 14:54:07 -08:00
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receiptSha := types.DeriveSha(receipts)
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2014-12-23 04:48:44 -08:00
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if bytes.Compare(receiptSha, header.ReceiptHash) != 0 {
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2014-12-23 09:35:36 -08:00
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fmt.Println("receipts", receipts)
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2014-12-23 04:48:44 -08:00
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err = fmt.Errorf("validating receipt root. received=%x got=%x", header.ReceiptHash, receiptSha)
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2014-12-04 14:54:07 -08:00
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return
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}
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2014-07-21 03:21:34 -07:00
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2015-02-11 14:46:45 -08:00
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// Accumulate static rewards; block reward, uncle's and uncle inclusion.
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2015-02-03 14:09:39 -08:00
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if err = sm.AccumulateRewards(state, block, parent); err != nil {
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2014-11-10 04:27:24 -08:00
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return
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2014-02-14 14:56:09 -08:00
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}
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2015-02-11 14:46:45 -08:00
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// Commit state objects/accounts to a temporary trie (does not save)
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// used to calculate the state root.
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2014-12-01 11:18:09 -08:00
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state.Update(ethutil.Big0)
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2014-12-23 04:48:44 -08:00
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if !bytes.Equal(header.Root, state.Root()) {
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err = fmt.Errorf("invalid merkle root. received=%x got=%x", header.Root, state.Root())
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2014-06-19 04:42:14 -07:00
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return
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2014-02-14 14:56:09 -08:00
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}
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2015-01-09 13:42:36 -08:00
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// Calculate the td for this block
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td = CalculateTD(block, parent)
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2015-02-02 20:02:00 -08:00
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// Sync the current block's state to the database
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2015-01-09 13:42:36 -08:00
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state.Sync()
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// Remove transactions from the pool
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sm.txpool.RemoveSet(block.Transactions())
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2014-02-14 14:56:09 -08:00
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2015-01-09 13:42:36 -08:00
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chainlogger.Infof("processed block #%d (%x...)\n", header.Number, block.Hash()[0:4])
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2015-01-03 08:18:43 -08:00
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2015-02-04 15:05:47 -08:00
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return td, nil
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2014-02-14 14:56:09 -08:00
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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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2015-01-04 15:18:44 -08:00
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func (sm *BlockProcessor) ValidateBlock(block, parent *types.Block) error {
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2015-01-05 15:17:05 -08:00
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if len(block.Header().Extra) > 1024 {
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return fmt.Errorf("Block extra data too long (%d)", len(block.Header().Extra))
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}
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2014-10-10 08:00:06 -07:00
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expd := CalcDifficulty(block, parent)
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2015-01-18 06:45:54 -08:00
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if expd.Cmp(block.Header().Difficulty) != 0 {
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2014-12-23 04:48:44 -08:00
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return fmt.Errorf("Difficulty check failed for block %v, %v", block.Header().Difficulty, expd)
|
2014-10-10 08:00:06 -07:00
|
|
|
}
|
|
|
|
|
2015-02-25 11:00:32 -08:00
|
|
|
expl := CalcGasLimit(parent, block)
|
|
|
|
if expl.Cmp(block.Header().GasLimit) != 0 {
|
|
|
|
return fmt.Errorf("GasLimit check failed for block %v, %v", block.Header().GasLimit, expl)
|
|
|
|
}
|
|
|
|
|
2015-02-05 14:42:12 -08:00
|
|
|
if block.Time() < parent.Time() {
|
|
|
|
return ValidationError("Block timestamp not after prev block (%v - %v)", block.Header().Time, parent.Header().Time)
|
2014-02-14 14:56:09 -08:00
|
|
|
}
|
|
|
|
|
2015-01-21 15:24:30 -08:00
|
|
|
if block.Time() > time.Now().Unix() {
|
2015-02-18 04:14:21 -08:00
|
|
|
return BlockFutureErr
|
|
|
|
}
|
|
|
|
|
|
|
|
if new(big.Int).Sub(block.Number(), parent.Number()).Cmp(big.NewInt(1)) != 0 {
|
|
|
|
return BlockNumberErr
|
2014-02-14 14:56:09 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
// Verify the nonce of the block. Return an error if it's not valid
|
2015-01-21 15:24:30 -08:00
|
|
|
if !sm.Pow.Verify(block) {
|
2014-12-23 04:48:44 -08:00
|
|
|
return ValidationError("Block's nonce is invalid (= %v)", ethutil.Bytes2Hex(block.Header().Nonce))
|
2014-02-14 14:56:09 -08:00
|
|
|
}
|
|
|
|
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2015-02-03 14:09:39 -08:00
|
|
|
func (sm *BlockProcessor) AccumulateRewards(statedb *state.StateDB, block, parent *types.Block) error {
|
2014-09-15 06:42:12 -07:00
|
|
|
reward := new(big.Int).Set(BlockReward)
|
2014-05-22 08:35:26 -07:00
|
|
|
|
2015-01-09 08:38:35 -08:00
|
|
|
ancestors := set.New()
|
2015-01-13 05:57:51 -08:00
|
|
|
for _, ancestor := range sm.bc.GetAncestors(block, 7) {
|
2015-01-09 08:38:35 -08:00
|
|
|
ancestors.Add(string(ancestor.Hash()))
|
2014-12-23 04:48:44 -08:00
|
|
|
}
|
|
|
|
|
2015-01-09 08:38:35 -08:00
|
|
|
uncles := set.New()
|
|
|
|
uncles.Add(string(block.Hash()))
|
2014-12-23 04:48:44 -08:00
|
|
|
for _, uncle := range block.Uncles() {
|
2015-01-09 08:38:35 -08:00
|
|
|
if uncles.Has(string(uncle.Hash())) {
|
2014-09-14 16:11:01 -07:00
|
|
|
// Error not unique
|
|
|
|
return UncleError("Uncle not unique")
|
|
|
|
}
|
2015-01-09 08:38:35 -08:00
|
|
|
uncles.Add(string(uncle.Hash()))
|
2014-02-17 16:33:26 -08:00
|
|
|
|
2015-01-09 13:23:33 -08:00
|
|
|
if !ancestors.Has(string(uncle.ParentHash)) {
|
2014-12-23 04:48:44 -08:00
|
|
|
return UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
|
2014-09-14 16:11:01 -07:00
|
|
|
}
|
2014-02-17 16:33:26 -08:00
|
|
|
|
2015-02-04 05:52:59 -08:00
|
|
|
if !sm.Pow.Verify(types.NewBlockWithHeader(uncle)) {
|
|
|
|
return ValidationError("Uncle's nonce is invalid (= %v)", ethutil.Bytes2Hex(uncle.Nonce))
|
|
|
|
}
|
|
|
|
|
2014-09-14 16:11:01 -07:00
|
|
|
r := new(big.Int)
|
|
|
|
r.Mul(BlockReward, big.NewInt(15)).Div(r, big.NewInt(16))
|
2014-02-14 14:56:09 -08:00
|
|
|
|
2015-02-20 05:01:30 -08:00
|
|
|
statedb.AddBalance(uncle.Coinbase, r)
|
2014-02-17 16:33:26 -08:00
|
|
|
|
2014-09-14 16:11:01 -07:00
|
|
|
reward.Add(reward, new(big.Int).Div(BlockReward, big.NewInt(32)))
|
2014-02-17 16:33:26 -08:00
|
|
|
}
|
2014-02-14 14:56:09 -08:00
|
|
|
|
2014-09-14 16:11:01 -07:00
|
|
|
// Get the account associated with the coinbase
|
2015-02-20 05:01:30 -08:00
|
|
|
statedb.AddBalance(block.Header().Coinbase, reward)
|
2014-09-14 16:11:01 -07:00
|
|
|
|
2014-02-14 14:56:09 -08:00
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2015-01-28 01:23:18 -08:00
|
|
|
func (sm *BlockProcessor) GetLogs(block *types.Block) (logs state.Logs, err error) {
|
|
|
|
if !sm.bc.HasBlock(block.Header().ParentHash) {
|
|
|
|
return nil, ParentError(block.Header().ParentHash)
|
|
|
|
}
|
|
|
|
|
|
|
|
sm.lastAttemptedBlock = block
|
|
|
|
|
|
|
|
var (
|
|
|
|
parent = sm.bc.GetBlock(block.Header().ParentHash)
|
2015-02-22 04:12:01 -08:00
|
|
|
state = state.New(parent.Root(), sm.db)
|
2015-01-28 01:23:18 -08:00
|
|
|
)
|
|
|
|
|
2015-02-22 04:12:01 -08:00
|
|
|
sm.TransitionState(state, parent, block, true)
|
2015-02-03 14:09:39 -08:00
|
|
|
sm.AccumulateRewards(state, block, parent)
|
2015-01-28 01:23:18 -08:00
|
|
|
|
|
|
|
return state.Logs(), nil
|
|
|
|
}
|