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269 lines
9.3 KiB
269 lines
9.3 KiB
package worker
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import (
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"math/big"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/params"
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consensus_engine "github.com/harmony-one/harmony/consensus/engine"
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"github.com/harmony-one/harmony/core"
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"github.com/harmony-one/harmony/core/state"
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"github.com/harmony-one/harmony/core/types"
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"github.com/harmony-one/harmony/core/vm"
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shardingconfig "github.com/harmony-one/harmony/internal/configs/sharding"
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"github.com/harmony-one/harmony/internal/ctxerror"
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"github.com/harmony-one/harmony/internal/utils"
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)
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// environment is the worker's current environment and holds all of the current state information.
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type environment struct {
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state *state.DB // apply state changes here
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gasPool *core.GasPool // available gas used to pack transactions
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header *types.Header
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txs []*types.Transaction
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receipts []*types.Receipt
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}
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// Worker is the main object which takes care of submitting new work to consensus engine
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// and gathering the sealing result.
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type Worker struct {
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config *params.ChainConfig
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chain *core.BlockChain
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current *environment // An environment for current running cycle.
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engine consensus_engine.Engine
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gasFloor uint64
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gasCeil uint64
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shardID uint32
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}
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// Returns a tuple where the first value is the txs sender account address,
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// the second is the throttling result enum for the transaction of interest.
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// Throttling happens based on the amount, frequency, etc.
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func (w *Worker) throttleTxs(selected types.Transactions, recentTxsStats types.RecentTxsStats, txsThrottleConfig *shardingconfig.TxsThrottleConfig, tx *types.Transaction) (common.Address, shardingconfig.TxThrottleFlag) {
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var sender common.Address
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msg, err := tx.AsMessage(types.MakeSigner(w.config, w.chain.CurrentBlock().Number()))
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if err != nil {
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utils.Logger().Error().Err(err).Str("txId", tx.Hash().Hex()).Msg("Error when parsing tx into message")
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} else {
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sender = msg.From()
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}
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// already selected max num txs
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if len(selected) > txsThrottleConfig.MaxNumTxsPerBlockLimit {
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utils.Logger().Info().Str("txId", tx.Hash().Hex()).Int("MaxNumTxsPerBlockLimit", txsThrottleConfig.MaxNumTxsPerBlockLimit).Msg("Throttling tx with max num txs per block limit")
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return sender, shardingconfig.TxUnselect
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}
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// throttle a single sender sending too many transactions in one block
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if tx.Value().Cmp(txsThrottleConfig.MaxTxAmountLimit) > 0 {
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utils.Logger().Info().Str("txId", tx.Hash().Hex()).Uint64("MaxTxAmountLimit", txsThrottleConfig.MaxTxAmountLimit.Uint64()).Uint64("txAmount", tx.Value().Uint64()).Msg("Throttling tx with max amount limit")
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return sender, shardingconfig.TxInvalid
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}
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// throttle too large transaction
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var numTxsPastHour uint64
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for _, blockTxsCounts := range recentTxsStats {
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numTxsPastHour += blockTxsCounts[sender]
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}
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if numTxsPastHour >= txsThrottleConfig.MaxNumRecentTxsPerAccountLimit {
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utils.Logger().Info().Str("txId", tx.Hash().Hex()).Uint64("MaxNumRecentTxsPerAccountLimit", txsThrottleConfig.MaxNumRecentTxsPerAccountLimit).Msg("Throttling tx with max txs per account in a single block limit")
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return sender, shardingconfig.TxInvalid
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}
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return sender, shardingconfig.TxSelect
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}
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// SelectTransactionsForNewBlock selects transactions for new block.
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func (w *Worker) SelectTransactionsForNewBlock(newBlockNum uint64, txs types.Transactions, recentTxsStats types.RecentTxsStats, txsThrottleConfig *shardingconfig.TxsThrottleConfig, coinbase common.Address) (types.Transactions, types.Transactions, types.Transactions) {
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if w.current.gasPool == nil {
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w.current.gasPool = new(core.GasPool).AddGas(w.current.header.GasLimit)
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}
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selected := types.Transactions{}
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unselected := types.Transactions{}
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invalid := types.Transactions{}
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for _, tx := range txs {
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if tx.ShardID() != w.shardID {
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invalid = append(invalid, tx)
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continue
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}
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sender, flag := w.throttleTxs(selected, recentTxsStats, txsThrottleConfig, tx)
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switch flag {
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case shardingconfig.TxUnselect:
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unselected = append(unselected, tx)
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case shardingconfig.TxInvalid:
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invalid = append(invalid, tx)
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case shardingconfig.TxSelect:
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snap := w.current.state.Snapshot()
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_, err := w.commitTransaction(tx, coinbase)
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if err != nil {
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w.current.state.RevertToSnapshot(snap)
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invalid = append(invalid, tx)
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utils.Logger().Error().Err(err).Str("txId", tx.Hash().Hex()).Msg("Commit transaction error")
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} else {
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selected = append(selected, tx)
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// handle the case when msg was not able to extracted from tx
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if len(sender.String()) > 0 {
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recentTxsStats[newBlockNum][sender]++
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}
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}
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}
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// log invalid or unselected txs
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if flag == shardingconfig.TxUnselect || flag == shardingconfig.TxInvalid {
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utils.Logger().Info().Str("txId", tx.Hash().Hex()).Str("txThrottleFlag", flag.String()).Msg("Transaction Throttle flag")
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}
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utils.Logger().Info().Str("txId", tx.Hash().Hex()).Uint64("txGasLimit", tx.Gas()).Msg("Transaction gas limit info")
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}
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utils.Logger().Info().Uint64("newBlockNum", newBlockNum).Uint64("blockGasLimit", w.current.header.GasLimit).Uint64("blockGasUsed", w.current.header.GasUsed).Msg("Block gas limit and usage info")
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return selected, unselected, invalid
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}
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func (w *Worker) commitTransaction(tx *types.Transaction, coinbase common.Address) ([]*types.Log, error) {
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snap := w.current.state.Snapshot()
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receipt, _, err := core.ApplyTransaction(w.config, w.chain, &coinbase, w.current.gasPool, w.current.state, w.current.header, tx, &w.current.header.GasUsed, vm.Config{})
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if err != nil {
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w.current.state.RevertToSnapshot(snap)
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return nil, err
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}
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w.current.txs = append(w.current.txs, tx)
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w.current.receipts = append(w.current.receipts, receipt)
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return receipt.Logs, nil
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}
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// CommitTransactions commits transactions.
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func (w *Worker) CommitTransactions(txs types.Transactions, coinbase common.Address) error {
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if w.current.gasPool == nil {
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w.current.gasPool = new(core.GasPool).AddGas(w.current.header.GasLimit)
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}
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for _, tx := range txs {
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snap := w.current.state.Snapshot()
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_, err := w.commitTransaction(tx, coinbase)
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if err != nil {
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w.current.state.RevertToSnapshot(snap)
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return err
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}
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}
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return nil
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}
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// UpdateCurrent updates the current environment with the current state and header.
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func (w *Worker) UpdateCurrent(coinbase common.Address) error {
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parent := w.chain.CurrentBlock()
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num := parent.Number()
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timestamp := time.Now().Unix()
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// New block's epoch is the same as parent's...
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epoch := new(big.Int).Set(parent.Header().Epoch)
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// TODO: Don't depend on sharding state for epoch change.
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if len(parent.Header().ShardState) > 0 && parent.NumberU64() != 0 {
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// ... except if parent has a resharding assignment it increases by 1.
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epoch = epoch.Add(epoch, common.Big1)
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}
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header := &types.Header{
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ParentHash: parent.Hash(),
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Number: num.Add(num, common.Big1),
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GasLimit: core.CalcGasLimit(parent, w.gasFloor, w.gasCeil),
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Time: big.NewInt(timestamp),
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Epoch: epoch,
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ShardID: w.chain.ShardID(),
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Coinbase: coinbase,
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}
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return w.makeCurrent(parent, header)
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}
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// makeCurrent creates a new environment for the current cycle.
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func (w *Worker) makeCurrent(parent *types.Block, header *types.Header) error {
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state, err := w.chain.StateAt(parent.Root())
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if err != nil {
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return err
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}
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env := &environment{
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state: state,
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header: header,
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}
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w.current = env
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return nil
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}
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// GetCurrentState gets the current state.
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func (w *Worker) GetCurrentState() *state.DB {
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return w.current.state
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}
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// GetCurrentReceipts get the receipts generated starting from the last state.
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func (w *Worker) GetCurrentReceipts() []*types.Receipt {
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return w.current.receipts
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}
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// Commit generate a new block for the new txs.
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func (w *Worker) Commit(sig []byte, signers []byte, viewID uint64, coinbase common.Address) (*types.Block, error) {
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if len(sig) > 0 && len(signers) > 0 {
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copy(w.current.header.LastCommitSignature[:], sig[:])
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w.current.header.LastCommitBitmap = append(signers[:0:0], signers...)
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}
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w.current.header.Coinbase = coinbase
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w.current.header.ViewID = new(big.Int)
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w.current.header.ViewID.SetUint64(viewID)
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s := w.current.state.Copy()
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copyHeader := types.CopyHeader(w.current.header)
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block, err := w.engine.Finalize(w.chain, copyHeader, s, w.current.txs, w.current.receipts)
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if err != nil {
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return nil, ctxerror.New("cannot finalize block").WithCause(err)
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}
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return block, nil
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}
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// New create a new worker object.
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func New(config *params.ChainConfig, chain *core.BlockChain, engine consensus_engine.Engine, shardID uint32) *Worker {
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worker := &Worker{
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config: config,
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chain: chain,
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engine: engine,
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}
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worker.gasFloor = 500000000000000000
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worker.gasCeil = 1000000000000000000
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worker.shardID = shardID
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parent := worker.chain.CurrentBlock()
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num := parent.Number()
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timestamp := time.Now().Unix()
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// New block's epoch is the same as parent's...
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epoch := new(big.Int).Set(parent.Header().Epoch)
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// TODO: Don't depend on sharding state for epoch change.
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if len(parent.Header().ShardState) > 0 && parent.NumberU64() != 0 {
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// ... except if parent has a resharding assignment it increases by 1.
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epoch = epoch.Add(epoch, common.Big1)
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}
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header := &types.Header{
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ParentHash: parent.Hash(),
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Number: num.Add(num, common.Big1),
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GasLimit: core.CalcGasLimit(parent, worker.gasFloor, worker.gasCeil),
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Time: big.NewInt(timestamp),
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Epoch: epoch,
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ShardID: worker.chain.ShardID(),
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}
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worker.makeCurrent(parent, header)
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return worker
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}
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