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hermez-node/synchronizer/synchronizer.go
synchronizer/synchronizer.goRaw
  1package synchronizer
  2
  3import (
  4	"context"
  5	"database/sql"
  6	"fmt"
  7
  8	"github.com/ethereum/go-ethereum"
  9	"github.com/hermeznetwork/hermez-node/common"
 10	"github.com/hermeznetwork/hermez-node/db/historydb"
 11	"github.com/hermeznetwork/hermez-node/db/statedb"
 12	"github.com/hermeznetwork/hermez-node/eth"
 13	"github.com/hermeznetwork/hermez-node/log"
 14)
 15
 16var (
 17// ErrNotAbleToSync is used when there is not possible to find a valid block to sync
 18// ErrNotAbleToSync = errors.New("it has not been possible to synchronize any block")
 19)
 20
 21// // SyncronizerState describes the synchronization progress of the smart contracts
 22// type SyncronizerState struct {
 23// 	LastUpdate                time.Time // last time this information was updated
 24// 	CurrentBatchNum           BatchNum  // Last batch that was forged on the blockchain
 25// 	CurrentBlockNum           uint64    // Last block that was mined on Ethereum
 26// 	CurrentToForgeL1TxsNum    uint32
 27// 	LastSyncedBatchNum        BatchNum // last batch synchronized by the coordinator
 28// 	LastSyncedBlockNum        uint64   // last Ethereum block synchronized by the coordinator
 29// 	LastSyncedToForgeL1TxsNum uint32
 30// }
 31
 32// // SyncStatus is returned by the Status method of the Synchronizer
 33// type SyncStatus struct {
 34// 	CurrentBlock      int64
 35// 	CurrentBatch      BatchNum
 36// 	CurrentForgerAddr ethCommon.Address
 37// 	NextForgerAddr    ethCommon.Address
 38// 	Synchronized      bool
 39// }
 40
 41// ConfigStartBlockNum sets the first block used to start tracking the smart
 42// contracts
 43type ConfigStartBlockNum struct {
 44	Rollup   int64
 45	Auction  int64
 46	WDelayer int64
 47}
 48
 49// Config is the Synchronizer configuration
 50type Config struct {
 51	StartBlockNum ConfigStartBlockNum
 52}
 53
 54// Synchronizer implements the Synchronizer type
 55type Synchronizer struct {
 56	ethClient         eth.ClientInterface
 57	auctionConstants  common.AuctionConstants
 58	rollupConstants   common.RollupConstants
 59	wDelayerConstants common.WDelayerConstants
 60	historyDB         *historydb.HistoryDB
 61	stateDB           *statedb.StateDB
 62	cfg               Config
 63	startBlockNum     int64
 64	// firstSavedBlock  *common.Block
 65	// mux sync.Mutex
 66}
 67
 68// NewSynchronizer creates a new Synchronizer
 69func NewSynchronizer(ethClient eth.ClientInterface, historyDB *historydb.HistoryDB,
 70	stateDB *statedb.StateDB, cfg Config) (*Synchronizer, error) {
 71	auctionConstants, err := ethClient.AuctionConstants()
 72	if err != nil {
 73		log.Errorw("NewSynchronizer ethClient.AuctionConstants()", "err", err)
 74		return nil, err
 75	}
 76	rollupConstants, err := ethClient.RollupConstants()
 77	if err != nil {
 78		log.Errorw("NewSynchronizer ethClient.RollupConstants()", "err", err)
 79		return nil, err
 80	}
 81	// TODO: Uncomment once ethClient.WDelayerConstants() is implemented
 82	// wDelayerConstants, err := ethClient.WDelayerConstants()
 83	// if err != nil {
 84	// 	log.Errorw("NewSynchronizer ethClient.WDelayerConstants()", "err", err)
 85	// 	return nil, err
 86	// }
 87
 88	// Set startBlockNum to the minimum between Auction, Rollup and
 89	// WDelayer StartBlockNum
 90	startBlockNum := cfg.StartBlockNum.Auction
 91	if startBlockNum < cfg.StartBlockNum.Rollup {
 92		startBlockNum = cfg.StartBlockNum.Rollup
 93	}
 94	if startBlockNum < cfg.StartBlockNum.WDelayer {
 95		startBlockNum = cfg.StartBlockNum.WDelayer
 96	}
 97	return &Synchronizer{
 98		ethClient:        ethClient,
 99		auctionConstants: *auctionConstants,
100		// auctionConstants: common.AuctionConstants{},
101		rollupConstants: *rollupConstants,
102		// rollupConstants: common.RollupConstants{},
103		// wDelayerConstants: *wDelayerConstants,
104		wDelayerConstants: common.WDelayerConstants{},
105		historyDB:         historyDB,
106		stateDB:           stateDB,
107		cfg:               cfg,
108		startBlockNum:     startBlockNum,
109	}, nil
110}
111
112// AuctionConstants returns the AuctionConstants read from the smart contract
113func (s *Synchronizer) AuctionConstants() *common.AuctionConstants {
114	return &s.auctionConstants
115}
116
117// RollupConstants returns the RollupConstants read from the smart contract
118func (s *Synchronizer) RollupConstants() *common.RollupConstants {
119	return &s.rollupConstants
120}
121
122// WDelayerConstants returns the WDelayerConstants read from the smart contract
123func (s *Synchronizer) WDelayerConstants() *common.WDelayerConstants {
124	return &s.wDelayerConstants
125}
126
127// Sync2 attems to synchronize an ethereum block starting from lastSavedBlock.
128// If lastSavedBlock is nil, the lastSavedBlock value is obtained from de DB.
129// If a block is synched, it will be returned and also stored in the DB.  If a
130// reorg is detected, the number of discarded blocks will be returned and no
131// synchronization will be made.
132// TODO: Be smart about locking: only lock during the read/write operations
133func (s *Synchronizer) Sync2(ctx context.Context, lastSavedBlock *common.Block) (*common.BlockData, *int64, error) {
134	var nextBlockNum int64 // next block number to sync
135	if lastSavedBlock == nil {
136		var err error
137		// Get lastSavedBlock from History DB
138		lastSavedBlock, err = s.historyDB.GetLastBlock()
139		if err != nil && err != sql.ErrNoRows {
140			return nil, nil, err
141		}
142		// If we don't have any stored block, we must do a full sync
143		// starting from the startBlockNum
144		if err == sql.ErrNoRows || lastSavedBlock.EthBlockNum == 0 {
145			nextBlockNum = s.startBlockNum
146			lastSavedBlock = nil
147		}
148	}
149	if lastSavedBlock != nil {
150		nextBlockNum = lastSavedBlock.EthBlockNum + 1
151	}
152
153	ethBlock, err := s.ethClient.EthBlockByNumber(ctx, nextBlockNum)
154	if err == ethereum.NotFound {
155		return nil, nil, nil
156	} else if err != nil {
157		return nil, nil, err
158	}
159	log.Debugf("ethBlock: num: %v, parent: %v, hash: %v", ethBlock.EthBlockNum, ethBlock.ParentHash.String(), ethBlock.Hash.String())
160
161	log.Debugw("Syncing...", "block", nextBlockNum)
162
163	// Check that the obtianed ethBlock.ParentHash == prevEthBlock.Hash; if not, reorg!
164	if lastSavedBlock != nil {
165		if lastSavedBlock.Hash != ethBlock.ParentHash {
166			// Reorg detected
167			log.Debugw("Reorg Detected",
168				"blockNum", ethBlock.EthBlockNum,
169				"block.parent(got)", ethBlock.ParentHash, "parent.hash(exp)", lastSavedBlock.Hash)
170			lastDBBlockNum, err := s.reorg(lastSavedBlock)
171			if err != nil {
172				return nil, nil, err
173			}
174			discarded := lastSavedBlock.EthBlockNum - lastDBBlockNum
175			return nil, &discarded, nil
176		}
177	}
178
179	// Get data from the rollup contract
180	rollupData, err := s.rollupSync(ethBlock)
181	if err != nil {
182		return nil, nil, err
183	}
184
185	// Get data from the auction contract
186	auctionData, err := s.auctionSync(ethBlock)
187	if err != nil {
188		return nil, nil, err
189	}
190
191	// Get data from the WithdrawalDelayer contract
192	wdelayerData, err := s.wdelayerSync(ethBlock)
193	if err != nil {
194		return nil, nil, err
195	}
196
197	// Group all the block data into the structs to save into HistoryDB
198	blockData := common.BlockData{
199		Block:    *ethBlock,
200		Rollup:   *rollupData,
201		Auction:  *auctionData,
202		WDelayer: *wdelayerData,
203	}
204
205	// log.Debugw("Sync()", "block", blockData)
206	// err = s.historyDB.AddBlock(blockData.Block)
207	// if err != nil {
208	// 	return err
209	// }
210	err = s.historyDB.AddBlockSCData(&blockData)
211	if err != nil {
212		return nil, nil, err
213	}
214
215	return &blockData, nil, nil
216}
217
218// reorg manages a reorg, updating History and State DB as needed.  Keeps
219// checking previous blocks from the HistoryDB against the blockchain until a
220// block hash match is found.  All future blocks in the HistoryDB and
221// corresponding batches in StateBD are discarded.  Returns the last valid
222// blockNum from the HistoryDB.
223func (s *Synchronizer) reorg(uncleBlock *common.Block) (int64, error) {
224	blockNum := uncleBlock.EthBlockNum
225
226	for blockNum >= s.startBlockNum {
227		ethBlock, err := s.ethClient.EthBlockByNumber(context.Background(), blockNum)
228		if err != nil {
229			return 0, err
230		}
231
232		block, err := s.historyDB.GetBlock(blockNum)
233		if err != nil {
234			return 0, err
235		}
236		if block.Hash == ethBlock.Hash {
237			log.Debugf("Found valid block: %v", blockNum)
238			break
239		}
240		blockNum--
241	}
242	total := uncleBlock.EthBlockNum - blockNum
243	log.Debugw("Discarding blocks", "total", total, "from", uncleBlock.EthBlockNum, "to", blockNum+1)
244
245	// Set History DB and State DB to the correct state
246	err := s.historyDB.Reorg(blockNum)
247	if err != nil {
248		return 0, err
249	}
250
251	batchNum, err := s.historyDB.GetLastBatchNum()
252	if err != nil && err != sql.ErrNoRows {
253		return 0, err
254	}
255	if batchNum != 0 {
256		err = s.stateDB.Reset(batchNum)
257		if err != nil {
258			return 0, err
259		}
260	}
261
262	return blockNum, nil
263}
264
265// TODO: Figure out who will use the Status output, and only return what's strictly need
266/*
267// Status returns current status values from the Synchronizer
268func (s *Synchronizer) Status() (*common.SyncStatus, error) {
269	// Avoid possible inconsistencies
270	s.mux.Lock()
271	defer s.mux.Unlock()
272
273	var status *common.SyncStatus
274
275	// TODO: Join all queries to the DB into a single transaction so that
276	// we can remove the mutex locking here:
277	// - HistoryDB.GetLastBlock
278	// - HistoryDB.GetLastBatchNum
279	// - HistoryDB.GetCurrentForgerAddr
280	// - HistoryDB.GetNextForgerAddr
281
282	// Get latest block in History DB
283	lastSavedBlock, err := s.historyDB.GetLastBlock()
284	if err != nil {
285		return nil, err
286	}
287	status.CurrentBlock = lastSavedBlock.EthBlockNum
288
289	// Get latest batch in History DB
290	lastSavedBatch, err := s.historyDB.GetLastBatchNum()
291	if err != nil && err != sql.ErrNoRows {
292		return nil, err
293	}
294	status.CurrentBatch = lastSavedBatch
295
296	// Get latest blockNum in blockchain
297	latestBlockNum, err := s.ethClient.EthCurrentBlock()
298	if err != nil {
299		return nil, err
300	}
301
302	// TODO: Get CurrentForgerAddr & NextForgerAddr from the Auction SC / Or from the HistoryDB
303
304	// Check if Synchronizer is synchronized
305	status.Synchronized = status.CurrentBlock == latestBlockNum
306	return status, nil
307}
308*/
309
310// rollupSync retreives all the Rollup Smart Contract Data that happened at
311// ethBlock.blockNum with ethBlock.Hash.
312func (s *Synchronizer) rollupSync(ethBlock *common.Block) (*common.RollupData, error) {
313	blockNum := ethBlock.EthBlockNum
314	var rollupData = common.NewRollupData()
315	// var forgeL1TxsNum int64
316
317	// Get rollup events in the block, and make sure the block hash matches
318	// the expected one.
319	rollupEvents, blockHash, err := s.ethClient.RollupEventsByBlock(blockNum)
320	if err != nil {
321		return nil, err
322	}
323	// No events in this block
324	if blockHash == nil {
325		return &rollupData, nil
326	}
327	if *blockHash != ethBlock.Hash {
328		log.Errorw("Block hash mismatch", "expectd", ethBlock.Hash.String(),
329			"got", blockHash.String())
330		return nil, eth.ErrBlockHashMismatchEvent
331	}
332
333	var nextForgeL1TxsNum int64 // forgeL1TxsNum for the next L1Batch
334	nextForgeL1TxsNumPtr, err := s.historyDB.GetLastL1TxsNum()
335	if err != nil {
336		return nil, err
337	}
338	if nextForgeL1TxsNumPtr != nil {
339		nextForgeL1TxsNum = *nextForgeL1TxsNumPtr + 1
340	} else {
341		nextForgeL1TxsNum = 0
342	}
343
344	// Get L1UserTX
345	rollupData.L1UserTxs, err = getL1UserTx(rollupEvents.L1UserTx, blockNum)
346	if err != nil {
347		return nil, err
348	}
349
350	// Get ForgeBatch events to get the L1CoordinatorTxs
351	for _, evtForgeBatch := range rollupEvents.ForgeBatch {
352		batchData := common.NewBatchData()
353		position := 0
354
355		// Get the input for each Tx
356		forgeBatchArgs, sender, err := s.ethClient.RollupForgeBatchArgs(evtForgeBatch.EthTxHash)
357		if err != nil {
358			return nil, err
359		}
360
361		batchNum := common.BatchNum(evtForgeBatch.BatchNum)
362		var l1UserTxs []common.L1Tx
363		// Check if this is a L1Batch to get L1 Tx from it
364		if forgeBatchArgs.L1Batch {
365			// Get L1UserTxs with toForgeL1TxsNum, which correspond
366			// to the L1UserTxs that are forged in this batch, so
367			// that stateDB can process them.
368
369			// First try to find them in HistoryDB.
370			l1UserTxs, err = s.historyDB.GetL1UserTxs(nextForgeL1TxsNum)
371			if err != nil {
372				return nil, err
373			}
374			// Apart from the DB, try to find them in this block.
375			// This could happen because in a block there could be
376			// multiple batches with L1Batch = true (although it's
377			// a very rare case).  If not found in the DB and the
378			// block doesn't contain the l1UserTxs, it means that
379			// the L1UserTxs queue with toForgeL1TxsNum was closed
380			// empty, so we leave `l1UserTxs` as an empty slice.
381			for _, l1UserTx := range rollupData.L1UserTxs {
382				if *l1UserTx.ToForgeL1TxsNum == nextForgeL1TxsNum {
383					l1UserTxs = append(l1UserTxs, l1UserTx)
384				}
385			}
386
387			position = len(l1UserTxs)
388		}
389		// Get L1 Coordinator Txs
390		for i := range forgeBatchArgs.L1CoordinatorTxs {
391			l1CoordinatorTx := forgeBatchArgs.L1CoordinatorTxs[i]
392			l1CoordinatorTx.Position = position
393			// l1CoordinatorTx.ToForgeL1TxsNum = &forgeL1TxsNum
394			l1CoordinatorTx.UserOrigin = false
395			l1CoordinatorTx.EthBlockNum = blockNum
396			l1CoordinatorTx.BatchNum = &batchNum
397			l1Tx, err := common.NewL1Tx(&l1CoordinatorTx)
398			if err != nil {
399				return nil, err
400			}
401
402			batchData.L1CoordinatorTxs = append(batchData.L1CoordinatorTxs, *l1Tx)
403			position++
404			// fmt.Println("DGB l1coordtx")
405		}
406
407		// Insert all the txs forged in this batch (l1UserTxs,
408		// L1CoordinatorTxs, PoolL2Txs) into stateDB so that they are
409		// processed.
410		poolL2Txs := common.L2TxsToPoolL2Txs(forgeBatchArgs.L2TxsData) // NOTE: This is a big ugly, find a better way
411
412		// ProcessTxs updates poolL2Txs adding: Nonce (and also TokenID, but we don't use it).
413		processTxsOut, err := s.stateDB.ProcessTxs(forgeBatchArgs.FeeIdxCoordinator, l1UserTxs,
414			batchData.L1CoordinatorTxs, poolL2Txs)
415		if err != nil {
416			return nil, err
417		}
418
419		// Set batchNum in exits
420		for i := range processTxsOut.ExitInfos {
421			exit := &processTxsOut.ExitInfos[i]
422			exit.BatchNum = batchNum
423		}
424		batchData.ExitTree = processTxsOut.ExitInfos
425
426		l2Txs, err := common.PoolL2TxsToL2Txs(poolL2Txs) // NOTE: This is a big uggly, find a better way
427		if err != nil {
428			return nil, err
429		}
430
431		for i := range l2Txs {
432			tx := &l2Txs[i]
433			tx.Position = position
434			tx.EthBlockNum = blockNum
435			tx.BatchNum = batchNum
436			nTx, err := common.NewL2Tx(tx)
437			if err != nil {
438				return nil, err
439			}
440
441			batchData.L2Txs = append(batchData.L2Txs, *nTx)
442			position++
443		}
444
445		for i := range processTxsOut.CreatedAccounts {
446			createdAccount := &processTxsOut.CreatedAccounts[i]
447			createdAccount.BatchNum = batchNum
448		}
449		batchData.CreatedAccounts = processTxsOut.CreatedAccounts
450
451		slotNum := int64(0)
452		if ethBlock.EthBlockNum >= s.auctionConstants.GenesisBlockNum {
453			slotNum = (ethBlock.EthBlockNum - s.auctionConstants.GenesisBlockNum) /
454				int64(s.auctionConstants.BlocksPerSlot)
455		}
456
457		// Get Batch information
458		batch := common.Batch{
459			BatchNum:      batchNum,
460			EthBlockNum:   blockNum,
461			ForgerAddr:    *sender,
462			CollectedFees: processTxsOut.CollectedFees,
463			StateRoot:     forgeBatchArgs.NewStRoot,
464			NumAccounts:   len(batchData.CreatedAccounts),
465			LastIdx:       forgeBatchArgs.NewLastIdx,
466			ExitRoot:      forgeBatchArgs.NewExitRoot,
467			SlotNum:       slotNum,
468		}
469		nextForgeL1TxsNumCpy := nextForgeL1TxsNum
470		if forgeBatchArgs.L1Batch {
471			batch.ForgeL1TxsNum = &nextForgeL1TxsNumCpy
472			batchData.L1Batch = true
473			nextForgeL1TxsNum++
474		}
475		batchData.Batch = batch
476		rollupData.Batches = append(rollupData.Batches, *batchData)
477	}
478
479	// Get Registered Tokens
480	for _, evtAddToken := range rollupEvents.AddToken {
481		var token common.Token
482
483		token.TokenID = common.TokenID(evtAddToken.TokenID)
484		token.EthAddr = evtAddToken.TokenAddress
485		token.EthBlockNum = blockNum
486
487		if consts, err := s.ethClient.EthERC20Consts(evtAddToken.TokenAddress); err != nil {
488			log.Warnw("Error retreiving ERC20 token constants", "addr", evtAddToken.TokenAddress)
489			token.Name = "ERC20_ETH_ERROR"
490			token.Symbol = "ERROR"
491			token.Decimals = 1
492		} else {
493			token.Name = cutStringMax(consts.Name, 20)
494			token.Symbol = cutStringMax(consts.Symbol, 10)
495			token.Decimals = consts.Decimals
496		}
497
498		rollupData.AddedTokens = append(rollupData.AddedTokens, token)
499	}
500
501	var vars common.RollupVariables
502	varsUpdate := false
503
504	for _, evtUpdateForgeL1L2BatchTimeout := range rollupEvents.UpdateForgeL1L2BatchTimeout {
505		vars.ForgeL1L2BatchTimeout = evtUpdateForgeL1L2BatchTimeout.NewForgeL1L2BatchTimeout
506		varsUpdate = true
507	}
508
509	for _, evtUpdateFeeAddToken := range rollupEvents.UpdateFeeAddToken {
510		vars.FeeAddToken = evtUpdateFeeAddToken.NewFeeAddToken
511		varsUpdate = true
512	}
513
514	// NOTE: WithdrawDelay update doesn't have event, so we can't track changes
515
516	// NOTE: Buckets update dones't have event, so we can't track changes
517
518	for _, evtWithdraw := range rollupEvents.Withdraw {
519		rollupData.Withdrawals = append(rollupData.Withdrawals, common.WithdrawInfo{
520			Idx:             common.Idx(evtWithdraw.Idx),
521			NumExitRoot:     common.BatchNum(evtWithdraw.NumExitRoot),
522			InstantWithdraw: evtWithdraw.InstantWithdraw,
523		})
524	}
525
526	if varsUpdate {
527		rollupData.Vars = &vars
528	}
529
530	return &rollupData, nil
531}
532
533func cutStringMax(s string, max int) string {
534	if len(s) > max {
535		return s[:max]
536	}
537	return s
538}
539
540// auctionSync gets information from the Auction Contract
541func (s *Synchronizer) auctionSync(ethBlock *common.Block) (*common.AuctionData, error) {
542	blockNum := ethBlock.EthBlockNum
543	var auctionData = common.NewAuctionData()
544
545	// Get auction events in the block
546	auctionEvents, blockHash, err := s.ethClient.AuctionEventsByBlock(blockNum)
547	if err != nil {
548		return nil, err
549	}
550	// No events in this block
551	if blockHash == nil {
552		return &auctionData, nil
553	}
554	if *blockHash != ethBlock.Hash {
555		log.Errorw("Block hash mismatch", "expectd", ethBlock.Hash.String(),
556			"got", blockHash.String())
557		return nil, eth.ErrBlockHashMismatchEvent
558	}
559
560	// Get bids
561	for _, evtNewBid := range auctionEvents.NewBid {
562		bid := common.Bid{
563			SlotNum:     evtNewBid.Slot,
564			BidValue:    evtNewBid.BidAmount,
565			Bidder:      evtNewBid.Bidder,
566			EthBlockNum: blockNum,
567		}
568		auctionData.Bids = append(auctionData.Bids, bid)
569	}
570
571	// Get Coordinators
572	for _, evtSetCoordinator := range auctionEvents.SetCoordinator {
573		coordinator := common.Coordinator{
574			Bidder: evtSetCoordinator.BidderAddress,
575			Forger: evtSetCoordinator.ForgerAddress,
576			URL:    evtSetCoordinator.CoordinatorURL,
577		}
578		auctionData.Coordinators = append(auctionData.Coordinators, coordinator)
579	}
580
581	var vars common.AuctionVariables
582	varsUpdate := false
583
584	for _, evt := range auctionEvents.NewSlotDeadline {
585		vars.SlotDeadline = evt.NewSlotDeadline
586		varsUpdate = true
587	}
588	for _, evt := range auctionEvents.NewClosedAuctionSlots {
589		vars.ClosedAuctionSlots = evt.NewClosedAuctionSlots
590		varsUpdate = true
591	}
592	for _, evt := range auctionEvents.NewOutbidding {
593		vars.Outbidding = evt.NewOutbidding
594		varsUpdate = true
595	}
596	for _, evt := range auctionEvents.NewDonationAddress {
597		vars.DonationAddress = evt.NewDonationAddress
598		varsUpdate = true
599	}
600	for _, evt := range auctionEvents.NewBootCoordinator {
601		vars.BootCoordinator = evt.NewBootCoordinator
602		varsUpdate = true
603	}
604	for _, evt := range auctionEvents.NewOpenAuctionSlots {
605		vars.OpenAuctionSlots = evt.NewOpenAuctionSlots
606		varsUpdate = true
607	}
608	for _, evt := range auctionEvents.NewAllocationRatio {
609		vars.AllocationRatio = evt.NewAllocationRatio
610		varsUpdate = true
611	}
612	for _, evt := range auctionEvents.NewDefaultSlotSetBid {
613		if evt.SlotSet > 6 { //nolint:gomnd
614			return nil, fmt.Errorf("unexpected SlotSet in "+
615				"auctionEvents.NewDefaultSlotSetBid: %v", evt.SlotSet)
616		}
617		vars.DefaultSlotSetBid[evt.SlotSet] = evt.NewInitialMinBid
618		varsUpdate = true
619	}
620
621	// NOTE: We ignore NewForgeAllocated
622	// NOTE: We ignore NewForge because we're already tracking ForgeBatch event from Rollup
623	// NOTE: We ignore HEZClaimed
624
625	if varsUpdate {
626		auctionData.Vars = &vars
627	}
628
629	return &auctionData, nil
630}
631
632// wdelayerSync gets information from the Withdrawal Delayer Contract
633func (s *Synchronizer) wdelayerSync(ethBlock *common.Block) (*common.WDelayerData, error) {
634	// blockNum := ethBlock.EthBlockNum
635
636	// TODO: Parse events to generate varialbes once ethClient.WDelayerEventsByBlock is implemented
637
638	wDelayerData := common.NewWDelayerData()
639
640	return &wDelayerData, nil
641}
642
643func getL1UserTx(eventsL1UserTx []eth.RollupEventL1UserTx, blockNum int64) ([]common.L1Tx, error) {
644	l1Txs := make([]common.L1Tx, len(eventsL1UserTx))
645	for i := range eventsL1UserTx {
646		eventsL1UserTx[i].L1UserTx.EthBlockNum = blockNum
647		// Check validity of L1UserTx
648		l1Tx, err := common.NewL1Tx(&eventsL1UserTx[i].L1UserTx)
649		if err != nil {
650			return nil, err
651		}
652		l1Txs[i] = *l1Tx
653	}
654	return l1Txs, nil
655}