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133 lines
3.6 KiB
133 lines
3.6 KiB
package worker
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/params"
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"github.com/harmony-one/harmony/consensus"
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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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"math/big"
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"time"
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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.StateDB // 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
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gasFloor uint64
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gasCeil uint64
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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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func (w *Worker) CommitTransactions(txs []*types.Transaction, coinbase common.Address) error {
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snap := w.current.state.Snapshot()
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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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_, 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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func (w *Worker) UpdateCurrent() 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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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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ShardId: types.EncodeShardId(w.chain.ShardId()),
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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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func (w *Worker) GetCurrentState() *state.StateDB {
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return w.current.state
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}
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func (w *Worker) Commit() (*types.Block, error) {
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s := w.current.state.Copy()
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block, err := w.engine.Finalize(w.chain, w.current.header, s, w.current.txs, w.current.receipts)
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if err != nil {
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return nil, err
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}
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return block, nil
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}
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func New(config *params.ChainConfig, chain *core.BlockChain, engine consensus.Engine) *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 = 0
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worker.gasCeil = 1000000000000000
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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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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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ShardId: types.EncodeShardId(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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