// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package miner

import (
	"bytes"
	"errors"
	"fmt"
	"math/big"
	"sync"
	"sync/atomic"
	"time"

	"github.com/XinFinOrg/XDPoSChain/XDCx/tradingstate"
	"github.com/XinFinOrg/XDPoSChain/XDCxlending/lendingstate"
	"github.com/XinFinOrg/XDPoSChain/accounts"
	"github.com/XinFinOrg/XDPoSChain/common"
	"github.com/XinFinOrg/XDPoSChain/consensus"
	"github.com/XinFinOrg/XDPoSChain/consensus/XDPoS"
	"github.com/XinFinOrg/XDPoSChain/consensus/misc"
	"github.com/XinFinOrg/XDPoSChain/consensus/misc/eip1559"
	"github.com/XinFinOrg/XDPoSChain/contracts"
	"github.com/XinFinOrg/XDPoSChain/core"
	"github.com/XinFinOrg/XDPoSChain/core/state"
	"github.com/XinFinOrg/XDPoSChain/core/txpool"
	"github.com/XinFinOrg/XDPoSChain/core/types"
	"github.com/XinFinOrg/XDPoSChain/core/vm"
	"github.com/XinFinOrg/XDPoSChain/ethdb"
	"github.com/XinFinOrg/XDPoSChain/event"
	"github.com/XinFinOrg/XDPoSChain/log"
	"github.com/XinFinOrg/XDPoSChain/metrics"
	"github.com/XinFinOrg/XDPoSChain/params"
	"github.com/XinFinOrg/XDPoSChain/trie"
	mapset "github.com/deckarep/golang-set/v2"
	"github.com/holiman/uint256"
)

const (
	resultQueueSize  = 10
	miningLogAtDepth = 5

	// txChanSize is the size of channel listening to NewTxsEvent.
	// The number is referenced from the size of tx pool.
	txChanSize = 4096
	// chainHeadChanSize is the size of channel listening to ChainHeadEvent.
	chainHeadChanSize = 10
	// chainSideChanSize is the size of channel listening to ChainSideEvent.
	chainSideChanSize = 10

	txMatchGasLimit = 40000000
)

var (
	blockNumberGauge   = metrics.NewRegisteredGauge("miner/number", nil)
	normalTxsMeter     = metrics.NewRegisteredGauge("miner/txs/normal", nil)
	specialTxsMeter    = metrics.NewRegisteredGauge("miner/txs/special", nil)
	blockCommitTimer   = metrics.NewRegisteredTimer("miner/time/commit", nil)
	blockFinalizeTimer = metrics.NewRegisteredTimer("miner/time/finalize", nil)
	blockTotalTimer    = metrics.NewRegisteredTimer("miner/time/total", nil)
	maxGasTip          = big.NewInt(1000 * params.GWei)
)

// Agent can register themself with the worker
type Agent interface {
	Work() chan<- *Work
	SetReturnCh(chan<- *Result)
	Stop()
	Start()
	GetHashRate() int64
}

// Work is the workers current environment and holds
// all of the current state information
type Work struct {
	config *params.ChainConfig
	signer types.Signer
	state  *state.StateDB // apply state changes here
	tcount int            // tx count in cycle
	evm    *vm.EVM

	parentState  *state.StateDB
	tradingState *tradingstate.TradingStateDB
	lendingState *lendingstate.LendingStateDB
	ancestors    mapset.Set[common.Hash] // ancestor set (used for checking uncle parent validity)
	family       mapset.Set[common.Hash] // family set (used for checking uncle invalidity)

	Block *types.Block // the new block

	header   *types.Header
	txs      []*types.Transaction
	receipts []*types.Receipt
	uncles   map[common.Hash]*types.Header

	createdAt time.Time
}

type Result struct {
	Work  *Work
	Block *types.Block
}

// worker is the main object which takes care of applying messages to the new state
type worker struct {
	config      *Config
	chainConfig *params.ChainConfig
	engine      consensus.Engine

	// Feeds
	pendingLogsFeed event.Feed

	// update loop
	mux          *event.TypeMux
	txsCh        chan core.NewTxsEvent
	txsSub       event.Subscription
	chainHeadCh  chan core.ChainHeadEvent
	chainHeadSub event.Subscription
	chainSideCh  chan core.ChainSideEvent
	chainSideSub event.Subscription
	resetCh      chan time.Duration // Channel to request timer resets

	wg sync.WaitGroup

	agents map[Agent]struct{}
	recv   chan *Result

	eth     Backend
	chain   *core.BlockChain
	proc    core.Validator
	chainDb ethdb.Database

	mu       sync.Mutex
	coinbase common.Address
	extra    []byte
	tip      *uint256.Int // Minimum tip needed for non-local transaction to include them

	snapshotMu       sync.RWMutex // The lock used to protect the block snapshot and state snapshot
	snapshotBlock    *types.Block
	snapshotReceipts types.Receipts
	snapshotState    *state.StateDB

	currentMu sync.Mutex
	current   *Work

	uncleMu        sync.Mutex
	possibleUncles map[common.Hash]*types.Block

	unconfirmed *unconfirmedBlocks // set of locally mined blocks pending canonicalness confirmations

	// atomic status counters
	mining                int32
	atWork                int32
	announceTxs           bool
	lastParentBlockCommit string
}

func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus.Engine, eth Backend, mux *event.TypeMux, announceTxs bool) *worker {
	worker := &worker{
		config:         config,
		chainConfig:    chainConfig,
		engine:         engine,
		eth:            eth,
		mux:            mux,
		coinbase:       config.Etherbase,
		extra:          config.ExtraData,
		tip:            uint256.MustFromBig(config.GasPrice),
		txsCh:          make(chan core.NewTxsEvent, txChanSize),
		chainHeadCh:    make(chan core.ChainHeadEvent, chainHeadChanSize),
		chainSideCh:    make(chan core.ChainSideEvent, chainSideChanSize),
		resetCh:        make(chan time.Duration, 1),
		chainDb:        eth.ChainDb(),
		recv:           make(chan *Result, resultQueueSize),
		chain:          eth.BlockChain(),
		proc:           eth.BlockChain().Validator(),
		possibleUncles: make(map[common.Hash]*types.Block),
		agents:         make(map[Agent]struct{}),
		unconfirmed:    newUnconfirmedBlocks(eth.BlockChain(), miningLogAtDepth),
		announceTxs:    announceTxs,
	}
	if worker.announceTxs {
		// Subscribe NewTxsEvent for tx pool
		worker.txsSub = eth.TxPool().SubscribeTransactions(worker.txsCh, true)
	}
	// Subscribe events for blockchain
	worker.chainHeadSub = eth.BlockChain().SubscribeChainHeadEvent(worker.chainHeadCh)
	worker.chainSideSub = eth.BlockChain().SubscribeChainSideEvent(worker.chainSideCh)
	go worker.update()

	go worker.wait()
	worker.commitNewWork()

	return worker
}

func (w *worker) setEtherbase(addr common.Address) {
	w.mu.Lock()
	defer w.mu.Unlock()
	w.coinbase = addr
}

func (w *worker) setExtra(extra []byte) {
	w.mu.Lock()
	defer w.mu.Unlock()
	w.extra = extra
}

// setGasTip sets the minimum miner tip needed to include a non-local transaction.
func (w *worker) setGasTip(tip *big.Int) error {
	w.mu.Lock()
	defer w.mu.Unlock()

	if tip == nil {
		return errors.New("reject nil gas tip")
	}
	if tip.Sign() < 0 {
		return fmt.Errorf("reject negative gas tip: %v", tip)
	}
	if tip.Cmp(maxGasTip) > 0 {
		return fmt.Errorf("reject too high gas tip: %v, maximum: %v", tip, maxGasTip)
	}

	// Copy the value to avoid external mutation through shared pointers.
	w.tip = uint256.MustFromBig(tip)
	log.Info("Worker tip updated", "tip", w.tip)
	return nil
}

// pending returns the pending state and corresponding block. The returned
// values can be nil in case the pending block is not initialized.
func (w *worker) pending() (*types.Block, *state.StateDB) {
	w.snapshotMu.RLock()
	defer w.snapshotMu.RUnlock()
	if w.snapshotState == nil {
		return nil, nil
	}
	return w.snapshotBlock, w.snapshotState.Copy()
}

// pendingBlock returns pending block. The returned block can be nil in case the
// pending block is not initialized.
func (w *worker) pendingBlock() *types.Block {
	w.snapshotMu.RLock()
	defer w.snapshotMu.RUnlock()
	return w.snapshotBlock
}

// pendingBlockAndReceipts returns pending block and corresponding receipts.
func (w *worker) pendingBlockAndReceipts() (*types.Block, types.Receipts) {
	// return a snapshot to avoid contention on currentMu mutex
	w.snapshotMu.RLock()
	defer w.snapshotMu.RUnlock()
	return w.snapshotBlock, w.snapshotReceipts
}

func (w *worker) start() {
	w.mu.Lock()
	defer w.mu.Unlock()

	atomic.StoreInt32(&w.mining, 1)

	// spin up agents
	for agent := range w.agents {
		agent.Start()
	}

	// Verify config and engine
	var xdposEngine *XDPoS.XDPoS
	if engine, ok := w.engine.(*XDPoS.XDPoS); ok {
		xdposEngine = engine
	}
	if w.chainConfig != nil && w.chainConfig.XDPoS != nil && xdposEngine == nil {
		log.Warn("XDPoS config enabled but consensus engine is not XDPoS")
	}
}

func (w *worker) stop() {
	w.wg.Wait()

	w.mu.Lock()
	defer w.mu.Unlock()
	if atomic.LoadInt32(&w.mining) == 1 {
		for agent := range w.agents {
			agent.Stop()
		}
	}
	atomic.StoreInt32(&w.mining, 0)
	atomic.StoreInt32(&w.atWork, 0)
}

func (w *worker) register(agent Agent) {
	w.mu.Lock()
	defer w.mu.Unlock()
	w.agents[agent] = struct{}{}
	agent.SetReturnCh(w.recv)
}

func (w *worker) unregister(agent Agent) {
	w.mu.Lock()
	defer w.mu.Unlock()
	delete(w.agents, agent)
	agent.Stop()
}

func (w *worker) update() {
	if w.announceTxs {
		defer w.txsSub.Unsubscribe()
	}
	defer w.chainHeadSub.Unsubscribe()
	defer w.chainSideSub.Unsubscribe()

	// timeout waiting for v1 initial value
	minePeriod := 2
	var minePeriodCh <-chan int
	var newRoundCh <-chan types.Round
	if xdposEngine, ok := w.engine.(*XDPoS.XDPoS); ok {
		minePeriodCh = xdposEngine.MinePeriodCh
		newRoundCh = xdposEngine.NewRoundCh
	}

	timeout := time.NewTimer(time.Duration(minePeriod) * time.Second)
	defer timeout.Stop()
	c := make(chan struct{}, 1)
	defer close(c)
	finish := make(chan struct{})
	defer close(finish)

	go func() {
		for {
			// A real event arrived, process interesting content
			select {
			case d := <-w.resetCh:
				// Reset the timer to the new duration.
				if !timeout.Stop() {
					// Drain the timer channel if it had already expired.
					select {
					case <-timeout.C:
					default:
					}
				}
				timeout.Reset(d)
			case <-timeout.C:
				c <- struct{}{}
			case <-finish:
				return
			}
		}
	}()
	for {
		// A real event arrived, process interesting content
		select {
		case v := <-minePeriodCh:
			log.Info("[worker] update wait period", "period", v)
			minePeriod = v
			w.resetCh <- time.Duration(minePeriod) * time.Second

		case <-c:
			if atomic.LoadInt32(&w.mining) == 1 {
				w.commitNewWork()
			}
			resetTime := getResetTime(w.chain, minePeriod)
			w.resetCh <- resetTime

		// Handle ChainHeadEvent
		case <-w.chainHeadCh:
			w.commitNewWork()
			resetTime := getResetTime(w.chain, minePeriod)
			w.resetCh <- resetTime

		// Handle new round
		case <-newRoundCh:
			w.commitNewWork()
			resetTime := getResetTime(w.chain, minePeriod)
			w.resetCh <- resetTime

		// Handle ChainSideEvent
		case <-w.chainSideCh:

		// Handle NewTxsEvent
		case ev := <-w.txsCh:
			// Apply transactions to the pending state if we're not mining.
			//
			// Note all transactions received may not be continuous with transactions
			// already included in the current mining block. These transactions will
			// be automatically eliminated.
			if atomic.LoadInt32(&w.mining) == 0 {
				w.currentMu.Lock()
				txs := make(map[common.Address][]*txpool.LazyTransaction, len(ev.Txs))
				for _, tx := range ev.Txs {
					acc, _ := types.Sender(w.current.signer, tx)
					txs[acc] = append(txs[acc], &txpool.LazyTransaction{
						Hash:      tx.Hash(),
						Tx:        tx,
						Time:      tx.Time(),
						GasFeeCap: uint256.MustFromBig(tx.GasFeeCap()),
						GasTipCap: uint256.MustFromBig(tx.GasTipCap()),
					})
				}
				feeCapacity := w.current.state.GetTRC21FeeCapacityFromState()
				txset, specialTxs := newTransactionsByPriceAndNonce(w.current.signer, txs, feeCapacity, w.current.header.BaseFee)

				tcount := w.current.tcount
				w.current.commitTransactions(w.mux, feeCapacity, txset, specialTxs, w.chain, &w.pendingLogsFeed)

				// Only update the snapshot if any new transactions were added
				// to the pending block
				if tcount != w.current.tcount {
					w.updateSnapshot()
				}
				w.currentMu.Unlock()
			} else {
				// If we're mining, but nothing is being processed, wake on new transactions
				if w.chainConfig.XDPoS != nil && w.chainConfig.XDPoS.Period == 0 {
					w.commitNewWork()
				}
			}

		case <-w.chainHeadSub.Err():
			return

		case <-w.chainSideSub.Err():
			return
		}
	}
}

func (w *worker) getHashrate() int64 {
	w.mu.Lock()
	defer w.mu.Unlock()

	total := int64(0)
	for agent := range w.agents {
		if _, ok := agent.(*CpuAgent); !ok {
			total += agent.GetHashRate()
		}
	}
	return total
}

func getResetTime(chain *core.BlockChain, minePeriod int) time.Duration {
	var (
		currentBlockTime   int64         = 0
		nowTime            int64         = 0
		resetTime          time.Duration = 0
		minePeriodDuration time.Duration = time.Duration(minePeriod) * time.Second
		header             *types.Header = chain.CurrentBlock()
	)
	if header != nil {
		currentBlockTime = int64(header.Time)
		nowTime = time.Now().UnixMilli()
		resetTime = time.Duration(currentBlockTime)*time.Second + minePeriodDuration - time.Duration(nowTime)*time.Millisecond
	}
	// in case the current block time is not very accurate
	if resetTime > minePeriodDuration || resetTime <= 0 {
		resetTime = minePeriodDuration
	}
	log.Debug("[update] Miner worker timer reset", "resetTimeSec", resetTime.Seconds(), "minePeriodSec", minePeriod, "currentBlockTimeSec", fmt.Sprintf("%d", currentBlockTime), "currentSystemTimeSec", fmt.Sprintf("%d.%03d", nowTime/1000, nowTime%1000))
	return resetTime
}

func (w *worker) wait() {
	for {
		mustCommitNewWork := true
		for result := range w.recv {
			atomic.AddInt32(&w.atWork, -1)

			if result == nil {
				continue
			}
			block := result.Block
			work := result.Work

			// Different block could share same sealhash, deep copy here to prevent write-write conflict.
			hash := block.Hash()
			receipts := make([]*types.Receipt, len(work.receipts))
			for i, receipt := range work.receipts {
				// add block location fields
				receipt.BlockHash = hash
				receipt.BlockNumber = block.Number()
				receipt.TransactionIndex = uint(i)

				receipts[i] = new(types.Receipt)
				*receipts[i] = *receipt
			}
			// Update the block hash in all logs since it is now available and not when the
			// receipt/log of individual transactions were created.
			for _, log := range work.state.Logs() {
				log.BlockHash = hash
			}
			// Commit block and state to database.
			w.currentMu.Lock()
			stat, err := w.chain.WriteBlockWithState(block, receipts, work.state, work.tradingState, work.lendingState)
			w.currentMu.Unlock()
			if err != nil {
				log.Error("Failed writing block to chain", "err", err)
				continue
			}
			// check if canon block and write transactions
			if stat == core.CanonStatTy {
				// implicit by posting ChainHeadEvent
				mustCommitNewWork = false
			}
			// Broadcast the block and announce chain insertion event
			w.mux.Post(core.NewMinedBlockEvent{Block: block})
			var (
				events []interface{}
				logs   = work.state.Logs()
			)
			events = append(events, core.ChainEvent{Block: block, Hash: block.Hash(), Logs: logs})
			if stat == core.CanonStatTy {
				events = append(events, core.ChainHeadEvent{Block: block})
			}
			if work.config.XDPoS != nil {
				// epoch block
				isEpochSwitchBlock, _, err := w.engine.(*XDPoS.XDPoS).IsEpochSwitch(block.Header())
				if err != nil {
					log.Error("[wait] fail to check if block is epoch switch block when worker waiting", "BlockNum", block.Number(), "Hash", block.Hash())
				}
				if isEpochSwitchBlock {
					core.CheckpointCh <- 1
				}
			}
			w.chain.UpdateBlocksHashCache(block)
			w.chain.PostChainEvents(events, logs)

			// Insert the block into the set of pending ones to wait for confirmations
			w.unconfirmed.Insert(block.NumberU64(), block.Hash())

			if mustCommitNewWork {
				w.commitNewWork()
			}

			if w.chainConfig.XDPoS != nil {
				c := w.engine.(*XDPoS.XDPoS)
				err = c.HandleProposedBlock(w.chain, block.Header())
				if err != nil {
					log.Warn("[wait] Unable to handle new proposed block", "err", err, "number", block.Number(), "hash", block.Hash())
				}

				authorized := c.IsAuthorisedAddress(w.chain, block.Header(), w.coinbase)
				if !authorized {
					valid := false
					masternodes := c.GetMasternodes(w.chain, block.Header())
					for _, m := range masternodes {
						if m == w.coinbase {
							valid = true
							break
						}
					}
					if !valid {
						log.Error("Coinbase address not in snapshot signers.")
						return
					}
				}
				// Send tx sign to smart contract blockSigners.
				if block.NumberU64()%common.MergeSignRange == 0 || !w.chainConfig.IsTIP2019(block.Number()) {
					if err := contracts.CreateTransactionSign(w.chainConfig, w.eth.TxPool(), w.eth.AccountManager(), block, w.chainDb, w.coinbase); err != nil {
						log.Error("Fail to create tx sign for signer", "error", err)
					}
				}
			}
		}
	}
}

// push sends a new work task to currently live miner agents.
func (w *worker) push(work *Work) {
	if atomic.LoadInt32(&w.mining) != 1 {
		return
	}
	for agent := range w.agents {
		atomic.AddInt32(&w.atWork, 1)
		if ch := agent.Work(); ch != nil {
			ch <- work
		}
	}
}

// copyReceipts makes a deep copy of the given receipts.
func copyReceipts(receipts []*types.Receipt) []*types.Receipt {
	result := make([]*types.Receipt, len(receipts))
	for i, receipt := range receipts {
		cpyReceipt := *receipt
		if len(receipt.PostState) > 0 {
			cpyReceipt.PostState = make([]byte, len(receipt.PostState))
			copy(cpyReceipt.PostState, receipt.PostState)
		}
		if cpyReceipt.EffectiveGasPrice = new(big.Int); receipt.EffectiveGasPrice != nil {
			cpyReceipt.EffectiveGasPrice.Set(receipt.EffectiveGasPrice)
		}
		if cpyReceipt.BlockNumber = new(big.Int); receipt.BlockNumber != nil {
			cpyReceipt.BlockNumber.Set(receipt.BlockNumber)
		}
		// deep copy logs
		if len(receipt.Logs) > 0 {
			cpyReceipt.Logs = make([]*types.Log, len(receipt.Logs))
			for i, log := range receipt.Logs {
				cpyLog := *log
				if len(log.Topics) > 0 {
					cpyLog.Topics = make([]common.Hash, len(log.Topics))
					copy(cpyLog.Topics, log.Topics)
				}
				if len(log.Data) > 0 {
					cpyLog.Data = make([]byte, len(log.Data))
					copy(cpyLog.Data, log.Data)
				}
				cpyReceipt.Logs[i] = &cpyLog
			}
		}
		result[i] = &cpyReceipt
	}
	return result
}

// updateSnapshot updates pending snapshot block and state.
// Note this function assumes the current variable is thread safe.
func (w *worker) updateSnapshot() {
	w.snapshotMu.Lock()
	defer w.snapshotMu.Unlock()

	w.snapshotBlock = types.NewBlock(
		w.current.header,
		&types.Body{Transactions: w.current.txs},
		w.current.receipts,
		trie.NewStackTrie(nil),
	)
	w.snapshotReceipts = copyReceipts(w.current.receipts)
	w.snapshotState = w.current.state.Copy()
}

// makeCurrent creates a new environment for the current cycle.
func (w *worker) makeCurrent(parent *types.Block, header *types.Header) error {
	// Retrieve the parent state to execute on top and start a prefetcher for
	// the miner to speed block sealing up a bit
	state, err := w.chain.StateAt(parent.Root())
	if err != nil {
		return err
	}

	author, _ := w.chain.Engine().Author(parent.Header())
	var XDCxState *tradingstate.TradingStateDB
	var lendingState *lendingstate.LendingStateDB
	if w.chainConfig.XDPoS != nil {
		XDCX := w.eth.GetXDCX()
		XDCxState, err = XDCX.GetTradingState(parent, author)
		if err != nil {
			log.Error("Failed to get XDCx state ", "number", parent.Number(), "err", err)
			return err
		}
		lending := w.eth.GetXDCXLending()
		lendingState, err = lending.GetLendingState(parent, author)
		if err != nil {
			log.Error("Failed to get lending state ", "number", parent.Number(), "err", err)
			return err
		}
	}

	work := &Work{
		config:       w.chainConfig,
		signer:       types.MakeSigner(w.chainConfig, header.Number),
		state:        state,
		parentState:  state.Copy(),
		tradingState: XDCxState,
		lendingState: lendingState,
		ancestors:    mapset.NewSet[common.Hash](),
		family:       mapset.NewSet[common.Hash](),
		header:       header,
		evm:          vm.NewEVM(core.NewEVMBlockContext(header, w.chain, &header.Coinbase), state, XDCxState, w.chainConfig, vm.Config{}),
		uncles:       make(map[common.Hash]*types.Header),
		createdAt:    time.Now(),
	}

	// Keep track of transactions which return errors so they can be removed
	work.tcount = 0
	w.current = work
	return nil
}

// checkPreCommitWithLock checks whether a new work commit is needed with locks,
// returns the parent block and shouldReturn.
func (w *worker) checkPreCommitWithLock() (*types.Block, bool) {
	w.mu.Lock()
	defer w.mu.Unlock()
	w.uncleMu.Lock()
	defer w.uncleMu.Unlock()
	w.currentMu.Lock()
	defer w.currentMu.Unlock()

	return w.checkPreCommit()
}

// checkPreCommit checks whether a new work commit is needed,
// returns the parent block and shouldReturn.
func (w *worker) checkPreCommit() (*types.Block, bool) {
	var xdposEngine *XDPoS.XDPoS
	if engine, ok := w.engine.(*XDPoS.XDPoS); ok {
		xdposEngine = engine
	}
	var parent *types.Block
	currentHeader := w.chain.CurrentBlock()
	// Guard against nil header (early startup or uninitialised chain).
	if currentHeader == nil {
		return nil, true
	}
	if xdposEngine != nil {
		parent = xdposEngine.FindParentBlockToAssign(w.chain, currentHeader)
	} else {
		parent = w.chain.GetBlock(currentHeader.Hash(), currentHeader.Number.Uint64())
	}
	if parent == nil {
		return nil, true
	}
	if w.chainConfig.XDPoS != nil && xdposEngine == nil {
		log.Debug("XDPoS config enabled but consensus engine is not XDPoS")
		return parent, true
	}
	if parent.Hash().Hex() == w.lastParentBlockCommit {
		return parent, true
	}
	if !w.announceTxs && atomic.LoadInt32(&w.mining) == 0 {
		return parent, true
	}

	// Only try to commit new work if we are mining
	if atomic.LoadInt32(&w.mining) == 1 {
		// check if we are right after parent's coinbase in the list
		if w.chainConfig.XDPoS != nil && xdposEngine != nil {
			ok, err := xdposEngine.YourTurn(w.chain, parent.Header(), w.coinbase)
			if err != nil {
				log.Warn("Failed when trying to commit new work", "err", err)
				return parent, true
			}
			if !ok {
				log.Info("Not my turn to commit block. Waiting...")
				return parent, true
			}
		}
	}

	return parent, false
}

func (w *worker) commitNewWork() {
	parent, shouldReturn := w.checkPreCommitWithLock()
	if parent == nil || shouldReturn {
		return
	}
	tstart := time.Now()
	tstamp := tstart.Unix()
	if parent.Time() >= uint64(tstamp) {
		tstamp = int64(parent.Time() + 1)
	}
	// this will ensure we're not going off too far in the future
	if now := time.Now().Unix(); tstamp > now {
		wait := time.Duration(tstamp-now) * time.Second
		log.Info("Mining too far in the future", "wait", common.PrettyDuration(wait))
		time.Sleep(wait)
	}

	w.mu.Lock()
	defer w.mu.Unlock()
	w.uncleMu.Lock()
	defer w.uncleMu.Unlock()
	w.currentMu.Lock()
	defer w.currentMu.Unlock()

	parent, shouldReturn = w.checkPreCommit()
	if parent == nil || shouldReturn {
		return
	}

	// Recalculate timestamp in case the parent changed while sleeping.
	tstamp = time.Now().Unix()
	if parent.Time() >= uint64(tstamp) {
		tstamp = int64(parent.Time() + 1)
	}
	num := parent.Number()
	header := &types.Header{
		ParentHash: parent.Hash(),
		Number:     num.Add(num, common.Big1),
		Extra:      w.extra,
		Time:       uint64(tstamp),
	}
	if w.chainConfig.IsDynamicGasLimitBlock(header.Number) {
		header.GasLimit = core.CalcGasLimit(parent.GasLimit(), w.config.GasCeil)
	} else {
		header.GasLimit = w.config.GasCeil
	}
	// Set baseFee if we are on an EIP-1559 chain
	header.BaseFee = eip1559.CalcBaseFee(w.chainConfig, header)

	// Only set the coinbase if we are mining (avoid spurious block rewards)
	if atomic.LoadInt32(&w.mining) == 1 {
		header.Coinbase = w.coinbase
	}

	if err := w.engine.Prepare(w.chain, header); err != nil {
		if err == consensus.ErrNotReadyToPropose {
			log.Info("Waiting...", "err", err)
			return
		}
		log.Error("Failed to prepare header for new block", "err", err)
		return
	}
	// If we are care about TheDAO hard-fork check whether to override the extra-data or not
	if daoBlock := w.chainConfig.DAOForkBlock; daoBlock != nil {
		// Check whether the block is among the fork extra-override range
		limit := new(big.Int).Add(daoBlock, params.DAOForkExtraRange)
		if header.Number.Cmp(daoBlock) >= 0 && header.Number.Cmp(limit) < 0 {
			// Depending whether we support or oppose the fork, override differently
			if w.chainConfig.DAOForkSupport {
				header.Extra = common.CopyBytes(params.DAOForkBlockExtra)
			} else if bytes.Equal(header.Extra, params.DAOForkBlockExtra) {
				header.Extra = []byte{} // If miner opposes, don't let it use the reserved extra-data
			}
		}
	}
	// Could potentially happen if starting to mine in an odd state.
	err := w.makeCurrent(parent, header)
	if err != nil {
		log.Error("Failed to create mining context", "err", err)
		return
	}
	// Create the current work task and check any fork transitions needed
	work := w.current
	if w.chainConfig.DAOForkSupport && w.chainConfig.DAOForkBlock != nil && w.chainConfig.DAOForkBlock.Cmp(header.Number) == 0 {
		misc.ApplyDAOHardFork(work.state)
	}
	if common.TIPSigning.Cmp(header.Number) == 0 {
		work.state.DeleteAddress(common.BlockSignersBinary)
	}
	if w.chainConfig.IsPrague(header.Number) {
		core.ProcessParentBlockHash(header.ParentHash, work.evm)
	}
	// won't grasp txs at checkpoint
	var (
		txs                                                                  *transactionsByPriceAndNonce
		specialTxs                                                           types.Transactions
		tradingTxMatches                                                     []tradingstate.TxDataMatch
		lendingMatchingResults                                               map[common.Hash]lendingstate.MatchingResult
		lendingInput                                                         []*lendingstate.LendingItem
		updatedTrades                                                        map[common.Hash]*lendingstate.LendingTrade
		liquidatedTrades, autoRepayTrades, autoTopUpTrades, autoRecallTrades []*lendingstate.LendingTrade
	)
	feeCapacity := work.state.GetTRC21FeeCapacityFromStateWithCache(parent.Root())
	if w.chainConfig.XDPoS != nil {
		isEpochSwitchBlock, _, err := w.engine.(*XDPoS.XDPoS).IsEpochSwitch(header)
		if err != nil {
			log.Error("[commitNewWork] fail to check if block is epoch switch block when fetching pending transactions", "BlockNum", header.Number, "Hash", header.Hash())
		}
		if !isEpochSwitchBlock {
			// Retrieve the pending transactions pre-filtered by the 1559 dynamic fees
			filter := txpool.PendingFilter{
				MinTip: w.tip,
			}
			if header.BaseFee != nil {
				filter.BaseFee = uint256.MustFromBig(header.BaseFee)
			}
			pending := w.eth.TxPool().Pending(filter)
			txs, specialTxs = newTransactionsByPriceAndNonce(w.current.signer, pending, feeCapacity, header.BaseFee)
		}
	}
	if atomic.LoadInt32(&w.mining) == 1 {
		wallet, err := w.eth.AccountManager().Find(accounts.Account{Address: w.coinbase})
		if err != nil {
			log.Warn("Can't find coinbase account wallet", "coinbase", w.coinbase, "err", err)
			return
		}
		if w.chainConfig.XDPoS != nil && w.chain.Config().IsTIPXDCXMiner(header.Number) {
			XDCX := w.eth.GetXDCX()
			XDCXLending := w.eth.GetXDCXLending()
			if XDCX != nil && header.Number.Uint64() > w.chainConfig.XDPoS.Epoch {
				isEpochSwitchBlock, epochNumber, err := w.engine.(*XDPoS.XDPoS).IsEpochSwitch(header)
				if err != nil {
					log.Error("[commitNewWork] fail to check if block is epoch switch block when performing XDCX and XDCXLending operations", "BlockNum", header.Number, "Hash", header.Hash())
				}

				if isEpochSwitchBlock {
					err := XDCX.UpdateMediumPriceBeforeEpoch(epochNumber, work.tradingState, work.state)
					if err != nil {
						log.Error("Fail when update medium price last epoch", "error", err)
						return
					}
				} else {
					// won't grasp tx at checkpoint
					//https://github.com/XinFinOrg/XDPoSChain-v1/pull/416
					log.Debug("Start processing order pending")
					tradingOrderPending, _ := w.eth.OrderPool().Pending()
					log.Debug("Start processing order pending", "len", len(tradingOrderPending))
					tradingTxMatches, _ = XDCX.ProcessOrderPending(header, w.coinbase, w.chain, tradingOrderPending, work.state, work.tradingState)
					log.Debug("trading transaction matches found", "tradingTxMatches", len(tradingTxMatches))

					lendingOrderPending, _ := w.eth.LendingPool().Pending()
					lendingInput, lendingMatchingResults = XDCXLending.ProcessOrderPending(header, w.coinbase, w.chain, lendingOrderPending, work.state, work.lendingState, work.tradingState)
					log.Debug("lending transaction matches found", "lendingInput", len(lendingInput), "lendingMatchingResults", len(lendingMatchingResults))
					if header.Number.Uint64()%w.chainConfig.XDPoS.Epoch == common.LiquidateLendingTradeBlock {
						updatedTrades, liquidatedTrades, autoRepayTrades, autoTopUpTrades, autoRecallTrades, err = XDCXLending.ProcessLiquidationData(header, w.chain, work.state, work.tradingState, work.lendingState)
						if err != nil {
							log.Error("Fail when process lending liquidation data ", "error", err)
							return
						}
					}
				}

				if len(tradingTxMatches) > 0 {
					txMatchBatch := &tradingstate.TxMatchBatch{
						Data:      tradingTxMatches,
						Timestamp: time.Now().UnixNano(),
						TxHash:    common.Hash{},
					}
					txMatchBytes, err := tradingstate.EncodeTxMatchesBatch(*txMatchBatch)
					if err != nil {
						log.Error("Fail to marshal txMatch", "error", err)
						return
					}
					nonce := work.state.GetNonce(w.coinbase)
					tx := types.NewTransaction(nonce, common.XDCXAddrBinary, big.NewInt(0), txMatchGasLimit, big.NewInt(0), txMatchBytes)
					txM, err := wallet.SignTx(accounts.Account{Address: w.coinbase}, tx, w.chainConfig.ChainID)
					if err != nil {
						log.Error("Fail to create tx matches", "error", err)
						return
					}
					// force adding trading, lending transaction to this block
					if txM != nil {
						specialTxs = append(specialTxs, txM)
					}
				}

				if len(lendingInput) > 0 {
					// lending transaction
					lendingBatch := &lendingstate.TxLendingBatch{
						Data:      lendingInput,
						Timestamp: time.Now().UnixNano(),
						TxHash:    common.Hash{},
					}
					lendingDataBytes, err := lendingstate.EncodeTxLendingBatch(*lendingBatch)
					if err != nil {
						log.Error("Fail to marshal lendingData", "error", err)
						return
					}
					nonce := work.state.GetNonce(w.coinbase)
					lendingTx := types.NewTransaction(nonce, common.XDCXLendingAddressBinary, big.NewInt(0), txMatchGasLimit, big.NewInt(0), lendingDataBytes)
					signedLendingTx, err := wallet.SignTx(accounts.Account{Address: w.coinbase}, lendingTx, w.chainConfig.ChainID)
					if err != nil {
						log.Error("Fail to create lending tx", "error", err)
						return
					}
					if signedLendingTx != nil {
						specialTxs = append(specialTxs, signedLendingTx)
					}
				}

				if len(updatedTrades) > 0 {
					log.Debug("M1 finalized trades")
					finalizedTradeData, err := lendingstate.EncodeFinalizedResult(liquidatedTrades, autoRepayTrades, autoTopUpTrades, autoRecallTrades)
					if err != nil {
						log.Error("Fail to marshal lendingData", "error", err)
						return
					}
					nonce := work.state.GetNonce(w.coinbase)
					finalizedTx := types.NewTransaction(nonce, common.XDCXLendingFinalizedTradeAddressBinary, big.NewInt(0), txMatchGasLimit, big.NewInt(0), finalizedTradeData)
					signedFinalizedTx, err := wallet.SignTx(accounts.Account{Address: w.coinbase}, finalizedTx, w.chainConfig.ChainID)
					if err != nil {
						log.Error("Fail to create lending tx", "error", err)
						return
					}
					if signedFinalizedTx != nil {
						specialTxs = append(specialTxs, signedFinalizedTx)
					}
				}
			}
			XDCxStateRoot := work.tradingState.IntermediateRoot()
			LendingStateRoot := work.lendingState.IntermediateRoot()
			txData := append(XDCxStateRoot.Bytes(), LendingStateRoot.Bytes()...)
			tx := types.NewTransaction(work.state.GetNonce(w.coinbase), common.TradingStateAddrBinary, big.NewInt(0), txMatchGasLimit, big.NewInt(0), txData)
			txStateRoot, err := wallet.SignTx(accounts.Account{Address: w.coinbase}, tx, w.chainConfig.ChainID)
			if err != nil {
				log.Error("Fail to create tx state root", "error", err)
				return
			}
			specialTxs = append(specialTxs, txStateRoot)
		}
	}
	work.commitTransactions(w.mux, feeCapacity, txs, specialTxs, w.chain, &w.pendingLogsFeed)
	commitEnd := time.Now()

	// compute uncles for the new block.
	var (
		uncles []*types.Header
	)

	// Create the new block to seal with the consensus engine
	if work.Block, err = w.engine.Finalize(w.chain, header, work.state, work.parentState, work.txs, uncles, work.receipts); err != nil {
		log.Error("Failed to finalize block for sealing", "err", err)
		return
	}

	if atomic.LoadInt32(&w.mining) == 1 {
		finalizeEnd := time.Now()
		commitElapsed := commitEnd.Sub(tstart)
		finalizeElapsed := finalizeEnd.Sub(commitEnd)
		totalElapsed := finalizeEnd.Sub(tstart)
		log.Info("Committing new block",
			"number", work.Block.Number(),
			"txs", work.tcount,
			"special_txs", len(specialTxs),
			"uncles", len(uncles),
			"commit_time", common.PrettyDuration(commitElapsed),
			"finalize_time", common.PrettyDuration(finalizeElapsed),
			"total_time", common.PrettyDuration(totalElapsed),
		)
		blockNumberGauge.Update(work.Block.Number().Int64())
		normalTxsMeter.Update(int64(work.tcount))
		specialTxsMeter.Update(int64(len(specialTxs)))
		blockCommitTimer.Update(commitElapsed)
		blockFinalizeTimer.Update(finalizeElapsed)
		blockTotalTimer.Update(totalElapsed)
		w.unconfirmed.Shift(work.Block.NumberU64() - 1)
		w.lastParentBlockCommit = parent.Hash().Hex()
	}
	w.push(work)
	w.updateSnapshot()
}

func (w *Work) commitTransactions(mux *event.TypeMux, balanceFee map[common.Address]*big.Int, txs *transactionsByPriceAndNonce, specialTxs types.Transactions, bc *core.BlockChain, pendingLogsFeed *event.Feed) {
	gp := new(core.GasPool).AddGas(w.header.GasLimit)
	balanceUpdated := map[common.Address]*big.Int{}
	totalFeeUsed := big.NewInt(0)
	var coalescedLogs []*types.Log
	// first priority for special Txs
	for _, tx := range specialTxs {
		to := tx.To()
		if w.header.Number.Uint64() >= common.DenylistHFNumber {
			from := tx.From()
			// check if sender is in denylist
			if common.IsInDenylist(from) {
				log.Debug("Skipping transaction with sender in denylist", "sender", from.Hex())
				continue
			}
			// check if receiver is in denylist
			if common.IsInDenylist(to) {
				log.Debug("Skipping transaction with receiver in denylist", "receiver", to.Hex())
				continue
			}
		}
		data := tx.Data()
		// validate minFee slot for XDCZ
		if tx.IsXDCZApplyTransaction() {
			copyState, _ := bc.State()
			if err := core.ValidateXDCZApplyTransaction(bc, nil, copyState, common.BytesToAddress(data[4:])); err != nil {
				log.Debug("XDCZApply: invalid token", "token", common.BytesToAddress(data[4:]).Hex())
				continue
			}
		}
		// validate balance slot, token decimal for XDCX
		if tx.IsXDCXApplyTransaction() {
			copyState, _ := bc.State()
			if err := core.ValidateXDCXApplyTransaction(bc, nil, copyState, common.BytesToAddress(data[4:])); err != nil {
				log.Debug("XDCXApply: invalid token", "token", common.BytesToAddress(data[4:]).Hex())
				continue
			}
		}

		if gp.Gas() < params.TxGas && tx.Gas() > 0 {
			log.Warn("Not enough gas for further transactions", "hash", tx.Hash().Hex(), "tx.Gas", tx.Gas(), "gp", gp, "need", params.TxGas)
			break
		}
		// Error may be ignored here. The error has already been checked
		// during transaction acceptance is the transaction pool.
		//
		// We use the eip155 signer regardless of the current hf.
		from, _ := types.Sender(w.signer, tx)
		// Check whether the tx is replay protected. If we're not in the EIP155 hf
		// phase, start ignoring the sender until we do.
		hash := tx.Hash()
		if tx.Protected() && !w.config.IsEIP155(w.header.Number) {
			log.Trace("Ignoring reply protected special transaction", "hash", hash, "eip155", w.config.EIP155Block)
			continue
		}
		if *to == common.BlockSignersBinary {
			if len(data) < 68 {
				log.Trace("Data special transaction invalid length", "hash", hash, "data", len(data))
				continue
			}
			blkNumber := new(big.Int).SetBytes(data[4:36]).Uint64()
			if blkNumber >= w.header.Number.Uint64() || blkNumber+w.config.XDPoS.Epoch*2 <= w.header.Number.Uint64() {
				log.Trace("Data special transaction invalid number", "hash", hash, "blkNumber", blkNumber, "miner", w.header.Number)
				continue
			}
		}
		// Start executing the transaction
		w.state.SetTxContext(hash, w.tcount)

		nonce := w.state.GetNonce(from)
		if nonce != tx.Nonce() && !tx.IsSkipNonceTransaction() {
			log.Trace("Skipping account with special transaction invalid nonce", "sender", from, "nonce", nonce, "tx nonce ", tx.Nonce(), "to", to)
			continue
		}
		logs, tokenFeeUsed, gas, err := w.commitTransaction(balanceFee, tx, gp)
		switch {
		case errors.Is(err, core.ErrNonceTooLow):
			// New head notification data race between the transaction pool and miner, shift
			log.Trace("Skipping special transaction with low nonce", "sender", from, "nonce", tx.Nonce(), "to", to)

		case errors.Is(err, core.ErrNonceTooHigh):
			// Reorg notification data race between the transaction pool and miner, skip account =
			log.Trace("Skipping account with special transaction hight nonce", "sender", from, "nonce", tx.Nonce(), "to", to)
		case errors.Is(err, nil):
			// Everything ok, collect the logs and shift in the next transaction from the same account
			coalescedLogs = append(coalescedLogs, logs...)
			w.tcount++

		default:
			// Strange error, discard the transaction and get the next in line (note, the
			// nonce-too-high clause will prevent us from executing in vain).
			log.Debug("Add Special Transaction failed, account skipped", "hash", hash, "sender", from, "nonce", tx.Nonce(), "to", to, "err", err)
		}
		if tokenFeeUsed {
			fee := common.GetGasFee(w.header.Number.Uint64(), gas)
			balanceFee[*to] = new(big.Int).Sub(balanceFee[*to], fee)
			balanceUpdated[*to] = balanceFee[*to]
			totalFeeUsed = totalFeeUsed.Add(totalFeeUsed, fee)
		}
	}
	for {
		// If we don't have enough gas for any further transactions then we're done
		if gp.Gas() < params.TxGas {
			log.Warn("Not enough gas for further transactions", "gp", gp, "need", params.TxGas)
			break
		}
		if txs == nil {
			log.Info("this block has no transaction")
			break
		}
		// Retrieve the next transaction and abort if all done
		lazyTx := txs.Peek()
		if lazyTx == nil {
			break
		}
		resolvedTx := lazyTx.Resolve()
		if resolvedTx == nil {
			break
		}
		tx := resolvedTx
		to := tx.To()
		if w.header.Number.Uint64() >= common.DenylistHFNumber {
			from := tx.From()
			// check if sender is in denylist
			if common.IsInDenylist(from) {
				log.Debug("Skipping transaction with sender in denylist", "sender", from.Hex())
				txs.Pop()
				continue
			}
			// check if receiver is in denylist
			if common.IsInDenylist(to) {
				log.Debug("Skipping transaction with receiver in denylist", "receiver", to.Hex())
				txs.Shift()
				continue
			}
		}
		data := tx.Data()
		// validate minFee slot for XDCZ
		if tx.IsXDCZApplyTransaction() {
			copyState, _ := bc.State()
			if err := core.ValidateXDCZApplyTransaction(bc, nil, copyState, common.BytesToAddress(data[4:])); err != nil {
				log.Debug("XDCZApply: invalid token", "token", common.BytesToAddress(data[4:]).Hex())
				txs.Pop()
				continue
			}
		}
		// validate balance slot, token decimal for XDCX
		if tx.IsXDCXApplyTransaction() {
			copyState, _ := bc.State()
			if err := core.ValidateXDCXApplyTransaction(bc, nil, copyState, common.BytesToAddress(data[4:])); err != nil {
				log.Debug("XDCXApply: invalid token", "token", common.BytesToAddress(data[4:]).Hex())
				txs.Pop()
				continue
			}
		}

		// Error may be ignored here. The error has already been checked
		// during transaction acceptance is the transaction pool.
		//
		// We use the eip155 signer regardless of the current hf.
		from, _ := types.Sender(w.signer, tx)
		hash := tx.Hash()
		// Check whether the tx is replay protected. If we're not in the EIP155 hf
		// phase, start ignoring the sender until we do.
		if tx.Protected() && !w.config.IsEIP155(w.header.Number) {
			log.Trace("Ignoring reply protected transaction", "hash", hash, "eip155", w.config.EIP155Block)
			txs.Pop()
			continue
		}
		// Start executing the transaction
		w.state.SetTxContext(hash, w.tcount)
		nonce := w.state.GetNonce(from)
		if nonce > tx.Nonce() {
			// New head notification data race between the transaction pool and miner, shift
			log.Trace("Skipping transaction with low nonce", "sender", from, "nonce", tx.Nonce())
			txs.Shift()
			continue
		}
		if nonce < tx.Nonce() {
			// Reorg notification data race between the transaction pool and miner, skip account =
			log.Trace("Skipping account with hight nonce", "sender", from, "nonce", tx.Nonce())
			txs.Pop()
			continue
		}
		logs, tokenFeeUsed, gas, err := w.commitTransaction(balanceFee, tx, gp)
		switch {
		case errors.Is(err, core.ErrGasLimitReached):
			// Pop the current out-of-gas transaction without shifting in the next from the account
			log.Warn("Gas limit exceeded for current block", "hash", tx.Hash().Hex(), "tx.Gas", tx.Gas(), "err", err)
			txs.Pop()

		case errors.Is(err, core.ErrNonceTooLow):
			// New head notification data race between the transaction pool and miner, shift
			log.Trace("Skipping transaction with low nonce", "sender", from, "nonce", tx.Nonce())
			txs.Shift()

		case errors.Is(err, core.ErrNonceTooHigh):
			// Reorg notification data race between the transaction pool and miner, skip account =
			log.Trace("Skipping account with high nonce", "sender", from, "nonce", tx.Nonce())
			txs.Pop()

		case errors.Is(err, nil):
			// Everything ok, collect the logs and shift in the next transaction from the same account
			coalescedLogs = append(coalescedLogs, logs...)
			w.tcount++
			txs.Shift()

		case errors.Is(err, types.ErrTxTypeNotSupported):
			// Pop the unsupported transaction without shifting in the next from the account
			log.Trace("Skipping unsupported transaction type", "sender", from, "type", tx.Type())
			txs.Pop()

		default:
			// Strange error, discard the transaction and get the next in line (note, the
			// nonce-too-high clause will prevent us from executing in vain).
			log.Debug("Transaction failed, account skipped", "hash", hash, "err", err)
			txs.Shift()
		}
		if tokenFeeUsed {
			fee := common.GetGasFee(w.header.Number.Uint64(), gas)
			balanceFee[*to] = new(big.Int).Sub(balanceFee[*to], fee)
			balanceUpdated[*to] = balanceFee[*to]
			totalFeeUsed = totalFeeUsed.Add(totalFeeUsed, fee)
		}
	}
	w.state.UpdateTRC21Fee(balanceUpdated, totalFeeUsed)
	// make a copy, the state caches the logs and these logs get "upgraded" from pending to mined
	// logs by filling in the block hash when the block was mined by the local miner. This can
	// cause a race condition if a log was "upgraded" before the PendingLogsEvent is processed.
	if len(coalescedLogs) > 0 {
		cpy := make([]*types.Log, len(coalescedLogs))
		for i, l := range coalescedLogs {
			cpy[i] = new(types.Log)
			*cpy[i] = *l
		}
		pendingLogsFeed.Send(cpy)
	}
	if w.tcount > 0 {
		go func(tcount int) {
			err := mux.Post(core.PendingStateEvent{})
			if err != nil {
				log.Warn("[commitTransactions] Error when sending PendingStateEvent", "tcount", tcount)
			}
		}(w.tcount)
	}
}

func (w *Work) commitTransaction(balanceFee map[common.Address]*big.Int, tx *types.Transaction, gp *core.GasPool) ([]*types.Log, bool, uint64, error) {
	snap := w.state.Snapshot()

	receipt, gas, tokenFeeUsed, err := core.ApplyTransaction(balanceFee, w.evm, gp, w.state, w.header, tx, &w.header.GasUsed)
	if err != nil {
		w.state.RevertToSnapshot(snap)
		return nil, false, 0, err
	}
	w.txs = append(w.txs, tx)
	w.receipts = append(w.receipts, receipt)

	return receipt.Logs, tokenFeeUsed, gas, nil
}