hermez-node/txprocessor/txprocessor.go
txprocessor/txprocessor.goRaw
1package txprocessor
2
3import (
4 "bytes"
5 "errors"
6 "fmt"
7 "io/ioutil"
8 "math/big"
9 "os"
10
11 "github.com/hermeznetwork/hermez-node/common"
12 "github.com/hermeznetwork/hermez-node/db/statedb"
13 "github.com/hermeznetwork/hermez-node/log"
14 "github.com/hermeznetwork/tracerr"
15 "github.com/iden3/go-iden3-crypto/babyjub"
16 "github.com/iden3/go-merkletree"
17 "github.com/iden3/go-merkletree/db"
18 "github.com/iden3/go-merkletree/db/pebble"
19)
20
21// TxProcessor represents the TxProcessor object
22type TxProcessor struct {
23 s *statedb.StateDB
24 zki *common.ZKInputs
25 // i is the current transaction index in the ZKInputs generation (zki)
26 i int
27 // AccumulatedFees contains the accumulated fees for each token (Coord
28 // Idx) in the processed batch
29 AccumulatedFees map[common.Idx]*big.Int
30 config Config
31}
32
33// Config contains the TxProcessor configuration parameters
34type Config struct {
35 NLevels uint32
36 MaxFeeTx uint32
37 MaxTx uint32
38 MaxL1Tx uint32
39 ChainID uint16
40}
41
42type processedExit struct {
43 exit bool
44 newExit bool
45 idx common.Idx
46 acc common.Account
47}
48
49// ProcessTxOutput contains the output of the ProcessTxs method
50type ProcessTxOutput struct {
51 ZKInputs *common.ZKInputs
52 ExitInfos []common.ExitInfo
53 CreatedAccounts []common.Account
54 CoordinatorIdxsMap map[common.TokenID]common.Idx
55 CollectedFees map[common.TokenID]*big.Int
56}
57
58// NewTxProcessor returns a new TxProcessor with the given *StateDB & Config
59func NewTxProcessor(sdb *statedb.StateDB, config Config) *TxProcessor {
60 return &TxProcessor{
61 s: sdb,
62 zki: nil,
63 i: 0,
64 config: config,
65 }
66}
67
68// StateDB returns a pointer to the StateDB of the TxProcessor
69func (tp *TxProcessor) StateDB() *statedb.StateDB {
70 return tp.s
71}
72
73func (tp *TxProcessor) resetZKInputs() {
74 tp.zki = nil
75 tp.i = 0 // initialize current transaction index in the ZKInputs generation
76}
77
78// ProcessTxs process the given L1Txs & L2Txs applying the needed updates to
79// the StateDB depending on the transaction Type. If StateDB
80// type==TypeBatchBuilder, returns the common.ZKInputs to generate the
81// SnarkProof later used by the BatchBuilder. If StateDB
82// type==TypeSynchronizer, assumes that the call is done from the Synchronizer,
83// returns common.ExitTreeLeaf that is later used by the Synchronizer to update
84// the HistoryDB, and adds Nonce & TokenID to the L2Txs.
85// And if TypeSynchronizer returns an array of common.Account with all the
86// created accounts.
87func (tp *TxProcessor) ProcessTxs(coordIdxs []common.Idx, l1usertxs, l1coordinatortxs []common.L1Tx,
88 l2txs []common.PoolL2Tx) (ptOut *ProcessTxOutput, err error) {
89 defer func() {
90 if err == nil {
91 err = tp.s.MakeCheckpoint()
92 }
93 }()
94
95 var exitTree *merkletree.MerkleTree
96 var createdAccounts []common.Account
97
98 if tp.zki != nil {
99 return nil, tracerr.Wrap(errors.New("Expected StateDB.zki==nil, something went wrong and it's not empty"))
100 }
101 defer tp.resetZKInputs()
102
103 if len(coordIdxs) >= int(tp.config.MaxFeeTx) {
104 return nil, tracerr.Wrap(fmt.Errorf("CoordIdxs (%d) length must be smaller than MaxFeeTx (%d)", len(coordIdxs), tp.config.MaxFeeTx))
105 }
106
107 nTx := len(l1usertxs) + len(l1coordinatortxs) + len(l2txs)
108
109 if nTx > int(tp.config.MaxTx) {
110 return nil, tracerr.Wrap(fmt.Errorf("L1UserTx + L1CoordinatorTx + L2Tx (%d) can not be bigger than MaxTx (%d)", nTx, tp.config.MaxTx))
111 }
112 if len(l1usertxs)+len(l1coordinatortxs) > int(tp.config.MaxL1Tx) {
113 return nil, tracerr.Wrap(fmt.Errorf("L1UserTx + L1CoordinatorTx (%d) can not be bigger than MaxL1Tx (%d)", len(l1usertxs)+len(l1coordinatortxs), tp.config.MaxTx))
114 }
115
116 exits := make([]processedExit, nTx)
117
118 if tp.s.Typ == statedb.TypeBatchBuilder {
119 tp.zki = common.NewZKInputs(tp.config.ChainID, tp.config.MaxTx, tp.config.MaxL1Tx,
120 tp.config.MaxFeeTx, tp.config.NLevels, (tp.s.CurrentBatch() + 1).BigInt())
121 tp.zki.OldLastIdx = tp.s.CurrentIdx().BigInt()
122 tp.zki.OldStateRoot = tp.s.MT.Root().BigInt()
123 tp.zki.Metadata.NewLastIdxRaw = tp.s.CurrentIdx()
124 }
125
126 // TBD if ExitTree is only in memory or stored in disk, for the moment
127 // is only needed in memory
128 if tp.s.Typ == statedb.TypeSynchronizer || tp.s.Typ == statedb.TypeBatchBuilder {
129 tmpDir, err := ioutil.TempDir("", "hermez-statedb-exittree")
130 if err != nil {
131 return nil, tracerr.Wrap(err)
132 }
133 defer func() {
134 if err := os.RemoveAll(tmpDir); err != nil {
135 log.Errorw("Deleting statedb temp exit tree", "err", err)
136 }
137 }()
138 sto, err := pebble.NewPebbleStorage(tmpDir, false)
139 if err != nil {
140 return nil, tracerr.Wrap(err)
141 }
142 defer sto.Close()
143 exitTree, err = merkletree.NewMerkleTree(sto, tp.s.MT.MaxLevels())
144 if err != nil {
145 return nil, tracerr.Wrap(err)
146 }
147 }
148
149 // Process L1UserTxs
150 for i := 0; i < len(l1usertxs); i++ {
151 // assumption: l1usertx are sorted by L1Tx.Position
152 exitIdx, exitAccount, newExit, createdAccount, err := tp.ProcessL1Tx(exitTree,
153 &l1usertxs[i])
154 if err != nil {
155 return nil, tracerr.Wrap(err)
156 }
157 if tp.s.Typ == statedb.TypeSynchronizer {
158 if createdAccount != nil {
159 createdAccounts = append(createdAccounts, *createdAccount)
160 l1usertxs[i].EffectiveFromIdx = createdAccount.Idx
161 } else {
162 l1usertxs[i].EffectiveFromIdx = l1usertxs[i].FromIdx
163 }
164 }
165 if tp.zki != nil {
166 l1TxData, err := l1usertxs[i].BytesGeneric()
167 if err != nil {
168 return nil, tracerr.Wrap(err)
169 }
170 tp.zki.Metadata.L1TxsData = append(tp.zki.Metadata.L1TxsData, l1TxData)
171
172 l1TxDataAvailability, err :=
173 l1usertxs[i].BytesDataAvailability(tp.zki.Metadata.NLevels)
174 if err != nil {
175 return nil, tracerr.Wrap(err)
176 }
177 tp.zki.Metadata.L1TxsDataAvailability =
178 append(tp.zki.Metadata.L1TxsDataAvailability, l1TxDataAvailability)
179
180 tp.zki.ISOutIdx[tp.i] = tp.s.CurrentIdx().BigInt()
181 tp.zki.ISStateRoot[tp.i] = tp.s.MT.Root().BigInt()
182 if exitIdx == nil {
183 tp.zki.ISExitRoot[tp.i] = exitTree.Root().BigInt()
184 }
185 }
186 if tp.s.Typ == statedb.TypeSynchronizer || tp.s.Typ == statedb.TypeBatchBuilder {
187 if exitIdx != nil && exitTree != nil {
188 exits[tp.i] = processedExit{
189 exit: true,
190 newExit: newExit,
191 idx: *exitIdx,
192 acc: *exitAccount,
193 }
194 }
195 tp.i++
196 }
197 }
198
199 // Process L1CoordinatorTxs
200 for i := 0; i < len(l1coordinatortxs); i++ {
201 exitIdx, _, _, createdAccount, err := tp.ProcessL1Tx(exitTree, &l1coordinatortxs[i])
202 if err != nil {
203 return nil, tracerr.Wrap(err)
204 }
205 if exitIdx != nil {
206 log.Error("Unexpected Exit in L1CoordinatorTx")
207 }
208 if tp.s.Typ == statedb.TypeSynchronizer {
209 if createdAccount != nil {
210 createdAccounts = append(createdAccounts, *createdAccount)
211 l1coordinatortxs[i].EffectiveFromIdx = createdAccount.Idx
212 } else {
213 l1coordinatortxs[i].EffectiveFromIdx = l1coordinatortxs[i].FromIdx
214 }
215 }
216 if tp.zki != nil {
217 l1TxData, err := l1coordinatortxs[i].BytesGeneric()
218 if err != nil {
219 return nil, tracerr.Wrap(err)
220 }
221 tp.zki.Metadata.L1TxsData = append(tp.zki.Metadata.L1TxsData, l1TxData)
222 l1TxDataAvailability, err :=
223 l1coordinatortxs[i].BytesDataAvailability(tp.zki.Metadata.NLevels)
224 if err != nil {
225 return nil, tracerr.Wrap(err)
226 }
227 tp.zki.Metadata.L1TxsDataAvailability =
228 append(tp.zki.Metadata.L1TxsDataAvailability, l1TxDataAvailability)
229
230 tp.zki.ISOutIdx[tp.i] = tp.s.CurrentIdx().BigInt()
231 tp.zki.ISStateRoot[tp.i] = tp.s.MT.Root().BigInt()
232 tp.i++
233 }
234 }
235
236 tp.AccumulatedFees = make(map[common.Idx]*big.Int)
237 for _, idx := range coordIdxs {
238 tp.AccumulatedFees[idx] = big.NewInt(0)
239 }
240
241 // once L1UserTxs & L1CoordinatorTxs are processed, get TokenIDs of
242 // coordIdxs. In this way, if a coordIdx uses an Idx that is being
243 // created in the current batch, at this point the Idx will be created
244 coordIdxsMap, err := tp.s.GetTokenIDsFromIdxs(coordIdxs)
245 if err != nil {
246 return nil, tracerr.Wrap(err)
247 }
248 // collectedFees will contain the amount of fee collected for each
249 // TokenID
250 var collectedFees map[common.TokenID]*big.Int
251 if tp.s.Typ == statedb.TypeSynchronizer || tp.s.Typ == statedb.TypeBatchBuilder {
252 collectedFees = make(map[common.TokenID]*big.Int)
253 for tokenID := range coordIdxsMap {
254 collectedFees[tokenID] = big.NewInt(0)
255 }
256 }
257
258 if tp.zki != nil {
259 // get the feePlanTokens
260 feePlanTokens, err := tp.getFeePlanTokens(coordIdxs)
261 if err != nil {
262 log.Error(err)
263 return nil, tracerr.Wrap(err)
264 }
265 copy(tp.zki.FeePlanTokens, feePlanTokens)
266 }
267
268 // Process L2Txs
269 for i := 0; i < len(l2txs); i++ {
270 exitIdx, exitAccount, newExit, err := tp.ProcessL2Tx(coordIdxsMap, collectedFees,
271 exitTree, &l2txs[i])
272 if err != nil {
273 return nil, tracerr.Wrap(err)
274 }
275 if tp.zki != nil {
276 l2TxData, err := l2txs[i].L2Tx().BytesDataAvailability(tp.zki.Metadata.NLevels)
277 if err != nil {
278 return nil, tracerr.Wrap(err)
279 }
280 tp.zki.Metadata.L2TxsData = append(tp.zki.Metadata.L2TxsData, l2TxData)
281
282 // Intermediate States
283 if tp.i < nTx-1 {
284 tp.zki.ISOutIdx[tp.i] = tp.s.CurrentIdx().BigInt()
285 tp.zki.ISStateRoot[tp.i] = tp.s.MT.Root().BigInt()
286 tp.zki.ISAccFeeOut[tp.i] = formatAccumulatedFees(collectedFees, tp.zki.FeePlanTokens, coordIdxs)
287 if exitIdx == nil {
288 tp.zki.ISExitRoot[tp.i] = exitTree.Root().BigInt()
289 }
290 }
291 }
292 if tp.s.Typ == statedb.TypeSynchronizer || tp.s.Typ == statedb.TypeBatchBuilder {
293 if exitIdx != nil && exitTree != nil {
294 exits[tp.i] = processedExit{
295 exit: true,
296 newExit: newExit,
297 idx: *exitIdx,
298 acc: *exitAccount,
299 }
300 }
301 tp.i++
302 }
303 }
304
305 if tp.zki != nil {
306 txCompressedDataEmpty := common.TxCompressedDataEmpty(tp.config.ChainID)
307 last := tp.i - 1
308 if tp.i == 0 {
309 last = 0
310 }
311 for i := last; i < int(tp.config.MaxTx); i++ {
312 if i < int(tp.config.MaxTx)-1 {
313 tp.zki.ISOutIdx[i] = tp.s.CurrentIdx().BigInt()
314 tp.zki.ISStateRoot[i] = tp.s.MT.Root().BigInt()
315 tp.zki.ISAccFeeOut[i] = formatAccumulatedFees(collectedFees, tp.zki.FeePlanTokens, coordIdxs)
316 tp.zki.ISExitRoot[i] = exitTree.Root().BigInt()
317 }
318 if i >= tp.i {
319 tp.zki.TxCompressedData[i] = txCompressedDataEmpty
320 }
321 }
322 isFinalAccFee := formatAccumulatedFees(collectedFees, tp.zki.FeePlanTokens, coordIdxs)
323 copy(tp.zki.ISFinalAccFee, isFinalAccFee)
324 // before computing the Fees txs, set the ISInitStateRootFee
325 tp.zki.ISInitStateRootFee = tp.s.MT.Root().BigInt()
326 }
327
328 // distribute the AccumulatedFees from the processed L2Txs into the
329 // Coordinator Idxs
330 iFee := 0
331 for _, idx := range coordIdxs {
332 accumulatedFee := tp.AccumulatedFees[idx]
333
334 cmp := accumulatedFee.Cmp(big.NewInt(0))
335 if cmp == 1 { // accumulatedFee>0
336 // send the fee to the Idx of the Coordinator for the TokenID
337 accCoord, err := tp.s.GetAccount(idx)
338 if err != nil {
339 log.Errorw("Can not distribute accumulated fees to coordinator account: No coord Idx to receive fee", "idx", idx)
340 return nil, tracerr.Wrap(err)
341 }
342 if tp.zki != nil {
343 tp.zki.TokenID3[iFee] = accCoord.TokenID.BigInt()
344 tp.zki.Nonce3[iFee] = accCoord.Nonce.BigInt()
345 coordBJJSign, coordBJJY := babyjub.UnpackSignY(accCoord.BJJ)
346 if coordBJJSign {
347 tp.zki.Sign3[iFee] = big.NewInt(1)
348 }
349 tp.zki.Ay3[iFee] = coordBJJY
350 tp.zki.Balance3[iFee] = accCoord.Balance
351 tp.zki.EthAddr3[iFee] = common.EthAddrToBigInt(accCoord.EthAddr)
352 }
353 accCoord.Balance = new(big.Int).Add(accCoord.Balance, accumulatedFee)
354 pFee, err := tp.s.UpdateAccount(idx, accCoord)
355 if err != nil {
356 log.Error(err)
357 return nil, tracerr.Wrap(err)
358 }
359 if tp.zki != nil {
360 tp.zki.Siblings3[iFee] = siblingsToZKInputFormat(pFee.Siblings)
361 tp.zki.ISStateRootFee[iFee] = tp.s.MT.Root().BigInt()
362 }
363 }
364 iFee++
365 }
366 if tp.zki != nil {
367 for i := len(tp.AccumulatedFees); i < int(tp.config.MaxFeeTx)-1; i++ {
368 tp.zki.ISStateRootFee[i] = tp.s.MT.Root().BigInt()
369 }
370 // add Coord Idx to ZKInputs.FeeTxsData
371 for i := 0; i < len(coordIdxs); i++ {
372 tp.zki.FeeIdxs[i] = coordIdxs[i].BigInt()
373 }
374 }
375
376 if tp.s.Typ == statedb.TypeTxSelector {
377 return nil, nil
378 }
379
380 // once all txs processed (exitTree root frozen), for each Exit,
381 // generate common.ExitInfo data
382 var exitInfos []common.ExitInfo
383 for i := 0; i < nTx; i++ {
384 if !exits[i].exit {
385 continue
386 }
387 exitIdx := exits[i].idx
388 exitAccount := exits[i].acc
389
390 // 0. generate MerkleProof
391 p, err := exitTree.GenerateSCVerifierProof(exitIdx.BigInt(), nil)
392 if err != nil {
393 return nil, tracerr.Wrap(err)
394 }
395
396 // 1. generate common.ExitInfo
397 ei := common.ExitInfo{
398 AccountIdx: exitIdx,
399 MerkleProof: p,
400 Balance: exitAccount.Balance,
401 }
402 exitInfos = append(exitInfos, ei)
403 }
404
405 if tp.s.Typ == statedb.TypeSynchronizer {
406 // return exitInfos, createdAccounts and collectedFees, so Synchronizer will
407 // be able to store it into HistoryDB for the concrete BatchNum
408 return &ProcessTxOutput{
409 ZKInputs: nil,
410 ExitInfos: exitInfos,
411 CreatedAccounts: createdAccounts,
412 CoordinatorIdxsMap: coordIdxsMap,
413 CollectedFees: collectedFees,
414 }, nil
415 }
416
417 // compute last ZKInputs parameters
418 tp.zki.GlobalChainID = big.NewInt(int64(tp.config.ChainID))
419 tp.zki.Metadata.NewStateRootRaw = tp.s.MT.Root()
420 tp.zki.Metadata.NewExitRootRaw = exitTree.Root()
421
422 // return ZKInputs as the BatchBuilder will return it to forge the Batch
423 return &ProcessTxOutput{
424 ZKInputs: tp.zki,
425 ExitInfos: nil,
426 CreatedAccounts: nil,
427 CoordinatorIdxsMap: coordIdxsMap,
428 CollectedFees: nil,
429 }, nil
430}
431
432// getFeePlanTokens returns an array of *big.Int containing a list of tokenIDs
433// corresponding to the given CoordIdxs and the processed L2Txs
434func (tp *TxProcessor) getFeePlanTokens(coordIdxs []common.Idx) ([]*big.Int, error) {
435 var tBI []*big.Int
436 for i := 0; i < len(coordIdxs); i++ {
437 acc, err := tp.s.GetAccount(coordIdxs[i])
438 if err != nil {
439 log.Errorf("could not get account to determine TokenID of CoordIdx %d not found: %s", coordIdxs[i], err.Error())
440 return nil, tracerr.Wrap(err)
441 }
442 tBI = append(tBI, acc.TokenID.BigInt())
443 }
444 return tBI, nil
445}
446
447// ProcessL1Tx process the given L1Tx applying the needed updates to the
448// StateDB depending on the transaction Type. It returns the 3 parameters
449// related to the Exit (in case of): Idx, ExitAccount, boolean determining if
450// the Exit created a new Leaf in the ExitTree.
451// And another *common.Account parameter which contains the created account in
452// case that has been a new created account and that the StateDB is of type
453// TypeSynchronizer.
454func (tp *TxProcessor) ProcessL1Tx(exitTree *merkletree.MerkleTree, tx *common.L1Tx) (*common.Idx,
455 *common.Account, bool, *common.Account, error) {
456 // ZKInputs
457 if tp.zki != nil {
458 // Txs
459 var err error
460 tp.zki.TxCompressedData[tp.i], err = tx.TxCompressedData(tp.config.ChainID)
461 if err != nil {
462 log.Error(err)
463 return nil, nil, false, nil, tracerr.Wrap(err)
464 }
465 tp.zki.FromIdx[tp.i] = tx.FromIdx.BigInt()
466 tp.zki.ToIdx[tp.i] = tx.ToIdx.BigInt()
467 tp.zki.OnChain[tp.i] = big.NewInt(1)
468
469 // L1Txs
470 depositAmountF16, err := common.NewFloat16(tx.DepositAmount)
471 if err != nil {
472 return nil, nil, false, nil, tracerr.Wrap(err)
473 }
474 tp.zki.DepositAmountF[tp.i] = big.NewInt(int64(depositAmountF16))
475 tp.zki.FromEthAddr[tp.i] = common.EthAddrToBigInt(tx.FromEthAddr)
476 if tx.FromBJJ != common.EmptyBJJComp {
477 tp.zki.FromBJJCompressed[tp.i] = BJJCompressedTo256BigInts(tx.FromBJJ)
478 }
479
480 // Intermediate States, for all the transactions except for the last one
481 if tp.i < len(tp.zki.ISOnChain) { // len(tp.zki.ISOnChain) == nTx
482 tp.zki.ISOnChain[tp.i] = big.NewInt(1)
483 }
484 }
485
486 switch tx.Type {
487 case common.TxTypeForceTransfer:
488 tp.computeEffectiveAmounts(tx)
489
490 // go to the MT account of sender and receiver, and update balance
491 // & nonce
492
493 // coordIdxsMap is 'nil', as at L1Txs there is no L2 fees.
494 // 0 for the parameter toIdx, as at L1Tx ToIdx can only be 0 in
495 // the Deposit type case.
496 err := tp.applyTransfer(nil, nil, tx.Tx(), 0)
497 if err != nil {
498 log.Error(err)
499 return nil, nil, false, nil, tracerr.Wrap(err)
500 }
501 case common.TxTypeCreateAccountDeposit:
502 tp.computeEffectiveAmounts(tx)
503
504 // add new account to the MT, update balance of the MT account
505 err := tp.applyCreateAccount(tx)
506 if err != nil {
507 log.Error(err)
508 return nil, nil, false, nil, tracerr.Wrap(err)
509 }
510 // TODO applyCreateAccount will return the created account,
511 // which in the case type==TypeSynchronizer will be added to an
512 // array of created accounts that will be returned
513 case common.TxTypeDeposit:
514 tp.computeEffectiveAmounts(tx)
515
516 // update balance of the MT account
517 err := tp.applyDeposit(tx, false)
518 if err != nil {
519 log.Error(err)
520 return nil, nil, false, nil, tracerr.Wrap(err)
521 }
522 case common.TxTypeDepositTransfer:
523 tp.computeEffectiveAmounts(tx)
524
525 // update balance in MT account, update balance & nonce of sender
526 // & receiver
527 err := tp.applyDeposit(tx, true)
528 if err != nil {
529 log.Error(err)
530 return nil, nil, false, nil, tracerr.Wrap(err)
531 }
532 case common.TxTypeCreateAccountDepositTransfer:
533 tp.computeEffectiveAmounts(tx)
534
535 // add new account to the merkletree, update balance in MT account,
536 // update balance & nonce of sender & receiver
537 err := tp.applyCreateAccountDepositTransfer(tx)
538 if err != nil {
539 log.Error(err)
540 return nil, nil, false, nil, tracerr.Wrap(err)
541 }
542 case common.TxTypeForceExit:
543 tp.computeEffectiveAmounts(tx)
544
545 // execute exit flow
546 // coordIdxsMap is 'nil', as at L1Txs there is no L2 fees
547 exitAccount, newExit, err := tp.applyExit(nil, nil, exitTree, tx.Tx())
548 if err != nil {
549 log.Error(err)
550 return nil, nil, false, nil, tracerr.Wrap(err)
551 }
552 return &tx.FromIdx, exitAccount, newExit, nil, nil
553 default:
554 }
555
556 var createdAccount *common.Account
557 if tp.s.Typ == statedb.TypeSynchronizer &&
558 (tx.Type == common.TxTypeCreateAccountDeposit ||
559 tx.Type == common.TxTypeCreateAccountDepositTransfer) {
560 var err error
561 createdAccount, err = tp.s.GetAccount(tp.s.CurrentIdx())
562 if err != nil {
563 log.Error(err)
564 return nil, nil, false, nil, tracerr.Wrap(err)
565 }
566 }
567
568 return nil, nil, false, createdAccount, nil
569}
570
571// ProcessL2Tx process the given L2Tx applying the needed updates to the
572// StateDB depending on the transaction Type. It returns the 3 parameters
573// related to the Exit (in case of): Idx, ExitAccount, boolean determining if
574// the Exit created a new Leaf in the ExitTree.
575func (tp *TxProcessor) ProcessL2Tx(coordIdxsMap map[common.TokenID]common.Idx,
576 collectedFees map[common.TokenID]*big.Int, exitTree *merkletree.MerkleTree,
577 tx *common.PoolL2Tx) (*common.Idx, *common.Account, bool, error) {
578 var err error
579 // if tx.ToIdx==0, get toIdx by ToEthAddr or ToBJJ
580 if tx.ToIdx == common.Idx(0) && tx.AuxToIdx == common.Idx(0) {
581 if tp.s.Typ == statedb.TypeSynchronizer {
582 // this should never be reached
583 log.Error("WARNING: In StateDB with Synchronizer mode L2.ToIdx can't be 0")
584 return nil, nil, false, tracerr.Wrap(fmt.Errorf("In StateDB with Synchronizer mode L2.ToIdx can't be 0"))
585 }
586 // case when tx.Type== common.TxTypeTransferToEthAddr or common.TxTypeTransferToBJJ
587
588 accSender, err := tp.s.GetAccount(tx.FromIdx)
589 if err != nil {
590 return nil, nil, false, tracerr.Wrap(err)
591 }
592 tx.AuxToIdx, err = tp.s.GetIdxByEthAddrBJJ(tx.ToEthAddr, tx.ToBJJ, accSender.TokenID)
593 if err != nil {
594 return nil, nil, false, tracerr.Wrap(err)
595 }
596 }
597
598 // ZKInputs
599 if tp.zki != nil {
600 // Txs
601 tp.zki.TxCompressedData[tp.i], err = tx.TxCompressedData(tp.config.ChainID)
602 if err != nil {
603 return nil, nil, false, tracerr.Wrap(err)
604 }
605 tp.zki.TxCompressedDataV2[tp.i], err = tx.TxCompressedDataV2()
606 if err != nil {
607 return nil, nil, false, tracerr.Wrap(err)
608 }
609 tp.zki.FromIdx[tp.i] = tx.FromIdx.BigInt()
610 tp.zki.ToIdx[tp.i] = tx.ToIdx.BigInt()
611
612 // fill AuxToIdx if needed
613 if tx.ToIdx == 0 {
614 // use toIdx that can have been filled by tx.ToIdx or
615 // if tx.Idx==0 (this case), toIdx is filled by the Idx
616 // from db by ToEthAddr&ToBJJ
617 tp.zki.AuxToIdx[tp.i] = tx.AuxToIdx.BigInt()
618 }
619
620 if tx.ToBJJ != common.EmptyBJJComp {
621 _, tp.zki.ToBJJAy[tp.i] = babyjub.UnpackSignY(tx.ToBJJ)
622 }
623 tp.zki.ToEthAddr[tp.i] = common.EthAddrToBigInt(tx.ToEthAddr)
624
625 tp.zki.OnChain[tp.i] = big.NewInt(0)
626 tp.zki.NewAccount[tp.i] = big.NewInt(0)
627
628 // L2Txs
629 // tp.zki.RqOffset[tp.i] = // TODO Rq once TxSelector is ready
630 // tp.zki.RqTxCompressedDataV2[tp.i] = // TODO
631 // tp.zki.RqToEthAddr[tp.i] = common.EthAddrToBigInt(tx.RqToEthAddr) // TODO
632 // tp.zki.RqToBJJAy[tp.i] = tx.ToBJJ.Y // TODO
633
634 signature, err := tx.Signature.Decompress()
635 if err != nil {
636 log.Error(err)
637 return nil, nil, false, tracerr.Wrap(err)
638 }
639 tp.zki.S[tp.i] = signature.S
640 tp.zki.R8x[tp.i] = signature.R8.X
641 tp.zki.R8y[tp.i] = signature.R8.Y
642 }
643
644 // if StateDB type==TypeSynchronizer, will need to add Nonce
645 if tp.s.Typ == statedb.TypeSynchronizer {
646 // as type==TypeSynchronizer, always tx.ToIdx!=0
647 acc, err := tp.s.GetAccount(tx.FromIdx)
648 if err != nil {
649 log.Errorw("GetAccount", "fromIdx", tx.FromIdx, "err", err)
650 return nil, nil, false, tracerr.Wrap(err)
651 }
652 tx.Nonce = acc.Nonce
653 tx.TokenID = acc.TokenID
654 }
655
656 switch tx.Type {
657 case common.TxTypeTransfer, common.TxTypeTransferToEthAddr, common.TxTypeTransferToBJJ:
658 // go to the MT account of sender and receiver, and update
659 // balance & nonce
660 err = tp.applyTransfer(coordIdxsMap, collectedFees, tx.Tx(), tx.AuxToIdx)
661 if err != nil {
662 log.Error(err)
663 return nil, nil, false, tracerr.Wrap(err)
664 }
665 case common.TxTypeExit:
666 // execute exit flow
667 exitAccount, newExit, err := tp.applyExit(coordIdxsMap, collectedFees, exitTree, tx.Tx())
668 if err != nil {
669 log.Error(err)
670 return nil, nil, false, tracerr.Wrap(err)
671 }
672 return &tx.FromIdx, exitAccount, newExit, nil
673 default:
674 }
675 return nil, nil, false, nil
676}
677
678// applyCreateAccount creates a new account in the account of the depositer, it
679// stores the deposit value
680func (tp *TxProcessor) applyCreateAccount(tx *common.L1Tx) error {
681 account := &common.Account{
682 TokenID: tx.TokenID,
683 Nonce: 0,
684 Balance: tx.EffectiveDepositAmount,
685 BJJ: tx.FromBJJ,
686 EthAddr: tx.FromEthAddr,
687 }
688
689 p, err := tp.s.CreateAccount(common.Idx(tp.s.CurrentIdx()+1), account)
690 if err != nil {
691 return tracerr.Wrap(err)
692 }
693 if tp.zki != nil {
694 tp.zki.TokenID1[tp.i] = tx.TokenID.BigInt()
695 tp.zki.Nonce1[tp.i] = big.NewInt(0)
696 fromBJJSign, fromBJJY := babyjub.UnpackSignY(tx.FromBJJ)
697 if fromBJJSign {
698 tp.zki.Sign1[tp.i] = big.NewInt(1)
699 }
700 tp.zki.Ay1[tp.i] = fromBJJY
701 tp.zki.Balance1[tp.i] = tx.EffectiveDepositAmount
702 tp.zki.EthAddr1[tp.i] = common.EthAddrToBigInt(tx.FromEthAddr)
703 tp.zki.Siblings1[tp.i] = siblingsToZKInputFormat(p.Siblings)
704 if p.IsOld0 {
705 tp.zki.IsOld0_1[tp.i] = big.NewInt(1)
706 }
707 tp.zki.OldKey1[tp.i] = p.OldKey.BigInt()
708 tp.zki.OldValue1[tp.i] = p.OldValue.BigInt()
709
710 tp.zki.Metadata.NewLastIdxRaw = tp.s.CurrentIdx() + 1
711
712 tp.zki.AuxFromIdx[tp.i] = common.Idx(tp.s.CurrentIdx() + 1).BigInt()
713 tp.zki.NewAccount[tp.i] = big.NewInt(1)
714
715 if tp.i < len(tp.zki.ISOnChain) { // len(tp.zki.ISOnChain) == nTx
716 // intermediate states
717 tp.zki.ISOnChain[tp.i] = big.NewInt(1)
718 }
719 }
720
721 return tp.s.SetCurrentIdx(tp.s.CurrentIdx() + 1)
722}
723
724// applyDeposit updates the balance in the account of the depositer, if
725// andTransfer parameter is set to true, the method will also apply the
726// Transfer of the L1Tx/DepositTransfer
727func (tp *TxProcessor) applyDeposit(tx *common.L1Tx, transfer bool) error {
728 accSender, err := tp.s.GetAccount(tx.FromIdx)
729 if err != nil {
730 return tracerr.Wrap(err)
731 }
732
733 if tp.zki != nil {
734 tp.zki.TokenID1[tp.i] = accSender.TokenID.BigInt()
735 tp.zki.Nonce1[tp.i] = accSender.Nonce.BigInt()
736 senderBJJSign, senderBJJY := babyjub.UnpackSignY(accSender.BJJ)
737 if senderBJJSign {
738 tp.zki.Sign1[tp.i] = big.NewInt(1)
739 }
740 tp.zki.Ay1[tp.i] = senderBJJY
741 tp.zki.Balance1[tp.i] = accSender.Balance
742 tp.zki.EthAddr1[tp.i] = common.EthAddrToBigInt(accSender.EthAddr)
743 }
744
745 // add the deposit to the sender
746 accSender.Balance = new(big.Int).Add(accSender.Balance, tx.EffectiveDepositAmount)
747 // subtract amount to the sender
748 accSender.Balance = new(big.Int).Sub(accSender.Balance, tx.EffectiveAmount)
749
750 // update sender account in localStateDB
751 p, err := tp.s.UpdateAccount(tx.FromIdx, accSender)
752 if err != nil {
753 return tracerr.Wrap(err)
754 }
755 if tp.zki != nil {
756 tp.zki.Siblings1[tp.i] = siblingsToZKInputFormat(p.Siblings)
757 // IsOld0_1, OldKey1, OldValue1 not needed as this is not an insert
758 }
759
760 // in case that the tx is a L1Tx>DepositTransfer
761 var accReceiver *common.Account
762 if transfer {
763 if tx.ToIdx == tx.FromIdx {
764 accReceiver = accSender
765 } else {
766 accReceiver, err = tp.s.GetAccount(tx.ToIdx)
767 if err != nil {
768 return tracerr.Wrap(err)
769 }
770 }
771
772 if tp.zki != nil {
773 tp.zki.TokenID2[tp.i] = accReceiver.TokenID.BigInt()
774 tp.zki.Nonce2[tp.i] = accReceiver.Nonce.BigInt()
775 receiverBJJSign, receiverBJJY := babyjub.UnpackSignY(accReceiver.BJJ)
776 if receiverBJJSign {
777 tp.zki.Sign2[tp.i] = big.NewInt(1)
778 }
779 tp.zki.Ay2[tp.i] = receiverBJJY
780 tp.zki.Balance2[tp.i] = accReceiver.Balance
781 tp.zki.EthAddr2[tp.i] = common.EthAddrToBigInt(accReceiver.EthAddr)
782 }
783
784 // add amount to the receiver
785 accReceiver.Balance = new(big.Int).Add(accReceiver.Balance, tx.EffectiveAmount)
786
787 // update receiver account in localStateDB
788 p, err := tp.s.UpdateAccount(tx.ToIdx, accReceiver)
789 if err != nil {
790 return tracerr.Wrap(err)
791 }
792 if tp.zki != nil {
793 tp.zki.Siblings2[tp.i] = siblingsToZKInputFormat(p.Siblings)
794 // IsOld0_2, OldKey2, OldValue2 not needed as this is not an insert
795 }
796 }
797
798 return nil
799}
800
801// applyTransfer updates the balance & nonce in the account of the sender, and
802// the balance in the account of the receiver.
803// Parameter 'toIdx' should be at 0 if the tx already has tx.ToIdx!=0, if
804// tx.ToIdx==0, then toIdx!=0, and will be used the toIdx parameter as Idx of
805// the receiver. This parameter is used when the tx.ToIdx is not specified and
806// the real ToIdx is found trhrough the ToEthAddr or ToBJJ.
807func (tp *TxProcessor) applyTransfer(coordIdxsMap map[common.TokenID]common.Idx,
808 collectedFees map[common.TokenID]*big.Int, tx common.Tx, auxToIdx common.Idx) error {
809 if auxToIdx == common.Idx(0) {
810 auxToIdx = tx.ToIdx
811 }
812 // get sender and receiver accounts from localStateDB
813 accSender, err := tp.s.GetAccount(tx.FromIdx)
814 if err != nil {
815 log.Error(err)
816 return tracerr.Wrap(err)
817 }
818
819 if tp.zki != nil {
820 // Set the State1 before updating the Sender leaf
821 tp.zki.TokenID1[tp.i] = accSender.TokenID.BigInt()
822 tp.zki.Nonce1[tp.i] = accSender.Nonce.BigInt()
823 senderBJJSign, senderBJJY := babyjub.UnpackSignY(accSender.BJJ)
824 if senderBJJSign {
825 tp.zki.Sign1[tp.i] = big.NewInt(1)
826 }
827 tp.zki.Ay1[tp.i] = senderBJJY
828 tp.zki.Balance1[tp.i] = accSender.Balance
829 tp.zki.EthAddr1[tp.i] = common.EthAddrToBigInt(accSender.EthAddr)
830 }
831 if !tx.IsL1 { // L2
832 // increment nonce
833 accSender.Nonce++
834
835 // compute fee and subtract it from the accSender
836 fee, err := common.CalcFeeAmount(tx.Amount, *tx.Fee)
837 if err != nil {
838 return tracerr.Wrap(err)
839 }
840 feeAndAmount := new(big.Int).Add(tx.Amount, fee)
841 accSender.Balance = new(big.Int).Sub(accSender.Balance, feeAndAmount)
842
843 if _, ok := coordIdxsMap[accSender.TokenID]; ok {
844 accCoord, err := tp.s.GetAccount(coordIdxsMap[accSender.TokenID])
845 if err != nil {
846 return tracerr.Wrap(fmt.Errorf("Can not use CoordIdx that does not exist in the tree. TokenID: %d, CoordIdx: %d", accSender.TokenID, coordIdxsMap[accSender.TokenID]))
847 }
848 // accumulate the fee for the Coord account
849 accumulated := tp.AccumulatedFees[accCoord.Idx]
850 accumulated.Add(accumulated, fee)
851
852 if tp.s.Typ == statedb.TypeSynchronizer ||
853 tp.s.Typ == statedb.TypeBatchBuilder {
854 collected := collectedFees[accCoord.TokenID]
855 collected.Add(collected, fee)
856 }
857 } else {
858 log.Debugw("No coord Idx to receive fee", "tx", tx)
859 }
860 } else {
861 accSender.Balance = new(big.Int).Sub(accSender.Balance, tx.Amount)
862 }
863
864 // update sender account in localStateDB
865 pSender, err := tp.s.UpdateAccount(tx.FromIdx, accSender)
866 if err != nil {
867 log.Error(err)
868 return tracerr.Wrap(err)
869 }
870 if tp.zki != nil {
871 tp.zki.Siblings1[tp.i] = siblingsToZKInputFormat(pSender.Siblings)
872 }
873
874 var accReceiver *common.Account
875 if auxToIdx == tx.FromIdx {
876 // if Sender is the Receiver, reuse 'accSender' pointer,
877 // because in the DB the account for 'auxToIdx' won't be
878 // updated yet
879 accReceiver = accSender
880 } else {
881 accReceiver, err = tp.s.GetAccount(auxToIdx)
882 if err != nil {
883 log.Error(err, auxToIdx)
884 return tracerr.Wrap(err)
885 }
886 }
887 if tp.zki != nil {
888 // Set the State2 before updating the Receiver leaf
889 tp.zki.TokenID2[tp.i] = accReceiver.TokenID.BigInt()
890 tp.zki.Nonce2[tp.i] = accReceiver.Nonce.BigInt()
891 receiverBJJSign, receiverBJJY := babyjub.UnpackSignY(accReceiver.BJJ)
892 if receiverBJJSign {
893 tp.zki.Sign2[tp.i] = big.NewInt(1)
894 }
895 tp.zki.Ay2[tp.i] = receiverBJJY
896 tp.zki.Balance2[tp.i] = accReceiver.Balance
897 tp.zki.EthAddr2[tp.i] = common.EthAddrToBigInt(accReceiver.EthAddr)
898 }
899
900 // add amount-feeAmount to the receiver
901 accReceiver.Balance = new(big.Int).Add(accReceiver.Balance, tx.Amount)
902
903 // update receiver account in localStateDB
904 pReceiver, err := tp.s.UpdateAccount(auxToIdx, accReceiver)
905 if err != nil {
906 return tracerr.Wrap(err)
907 }
908 if tp.zki != nil {
909 tp.zki.Siblings2[tp.i] = siblingsToZKInputFormat(pReceiver.Siblings)
910 }
911
912 return nil
913}
914
915// applyCreateAccountDepositTransfer, in a single tx, creates a new account,
916// makes a deposit, and performs a transfer to another account
917func (tp *TxProcessor) applyCreateAccountDepositTransfer(tx *common.L1Tx) error {
918 auxFromIdx := common.Idx(tp.s.CurrentIdx() + 1)
919 accSender := &common.Account{
920 TokenID: tx.TokenID,
921 Nonce: 0,
922 Balance: tx.EffectiveDepositAmount,
923 BJJ: tx.FromBJJ,
924 EthAddr: tx.FromEthAddr,
925 }
926
927 if tp.zki != nil {
928 // Set the State1 before updating the Sender leaf
929 tp.zki.TokenID1[tp.i] = tx.TokenID.BigInt()
930 tp.zki.Nonce1[tp.i] = big.NewInt(0)
931 fromBJJSign, fromBJJY := babyjub.UnpackSignY(tx.FromBJJ)
932 if fromBJJSign {
933 tp.zki.Sign1[tp.i] = big.NewInt(1)
934 }
935 tp.zki.Ay1[tp.i] = fromBJJY
936 tp.zki.Balance1[tp.i] = tx.EffectiveDepositAmount
937 tp.zki.EthAddr1[tp.i] = common.EthAddrToBigInt(tx.FromEthAddr)
938 }
939
940 // subtract amount to the sender
941 accSender.Balance = new(big.Int).Sub(accSender.Balance, tx.EffectiveAmount)
942
943 // create Account of the Sender
944 p, err := tp.s.CreateAccount(common.Idx(tp.s.CurrentIdx()+1), accSender)
945 if err != nil {
946 return tracerr.Wrap(err)
947 }
948 if tp.zki != nil {
949 tp.zki.Siblings1[tp.i] = siblingsToZKInputFormat(p.Siblings)
950 if p.IsOld0 {
951 tp.zki.IsOld0_1[tp.i] = big.NewInt(1)
952 }
953 tp.zki.OldKey1[tp.i] = p.OldKey.BigInt()
954 tp.zki.OldValue1[tp.i] = p.OldValue.BigInt()
955
956 tp.zki.Metadata.NewLastIdxRaw = tp.s.CurrentIdx() + 1
957
958 tp.zki.AuxFromIdx[tp.i] = auxFromIdx.BigInt()
959 tp.zki.NewAccount[tp.i] = big.NewInt(1)
960
961 // intermediate states
962 tp.zki.ISOnChain[tp.i] = big.NewInt(1)
963 }
964 var accReceiver *common.Account
965 if tx.ToIdx == auxFromIdx {
966 accReceiver = accSender
967 } else {
968 accReceiver, err = tp.s.GetAccount(tx.ToIdx)
969 if err != nil {
970 log.Error(err)
971 return tracerr.Wrap(err)
972 }
973 }
974
975 if tp.zki != nil {
976 // Set the State2 before updating the Receiver leaf
977 tp.zki.TokenID2[tp.i] = accReceiver.TokenID.BigInt()
978 tp.zki.Nonce2[tp.i] = accReceiver.Nonce.BigInt()
979 receiverBJJSign, receiverBJJY := babyjub.UnpackSignY(accReceiver.BJJ)
980 if receiverBJJSign {
981 tp.zki.Sign2[tp.i] = big.NewInt(1)
982 }
983 tp.zki.Ay2[tp.i] = receiverBJJY
984 tp.zki.Balance2[tp.i] = accReceiver.Balance
985 tp.zki.EthAddr2[tp.i] = common.EthAddrToBigInt(accReceiver.EthAddr)
986 }
987
988 // add amount to the receiver
989 accReceiver.Balance = new(big.Int).Add(accReceiver.Balance, tx.EffectiveAmount)
990
991 // update receiver account in localStateDB
992 p, err = tp.s.UpdateAccount(tx.ToIdx, accReceiver)
993 if err != nil {
994 return tracerr.Wrap(err)
995 }
996 if tp.zki != nil {
997 tp.zki.Siblings2[tp.i] = siblingsToZKInputFormat(p.Siblings)
998 }
999
1000 return tp.s.SetCurrentIdx(tp.s.CurrentIdx() + 1)
1001}
1002
1003// It returns the ExitAccount and a boolean determining if the Exit created a
1004// new Leaf in the ExitTree.
1005func (tp *TxProcessor) applyExit(coordIdxsMap map[common.TokenID]common.Idx,
1006 collectedFees map[common.TokenID]*big.Int, exitTree *merkletree.MerkleTree,
1007 tx common.Tx) (*common.Account, bool, error) {
1008 // 0. subtract tx.Amount from current Account in StateMT
1009 // add the tx.Amount into the Account (tx.FromIdx) in the ExitMT
1010 acc, err := tp.s.GetAccount(tx.FromIdx)
1011 if err != nil {
1012 return nil, false, tracerr.Wrap(err)
1013 }
1014 if tp.zki != nil {
1015 tp.zki.TokenID1[tp.i] = acc.TokenID.BigInt()
1016 tp.zki.Nonce1[tp.i] = acc.Nonce.BigInt()
1017 accBJJSign, accBJJY := babyjub.UnpackSignY(acc.BJJ)
1018 if accBJJSign {
1019 tp.zki.Sign1[tp.i] = big.NewInt(1)
1020 }
1021 tp.zki.Ay1[tp.i] = accBJJY
1022 tp.zki.Balance1[tp.i] = acc.Balance
1023 tp.zki.EthAddr1[tp.i] = common.EthAddrToBigInt(acc.EthAddr)
1024 }
1025
1026 if !tx.IsL1 {
1027 // increment nonce
1028 acc.Nonce++
1029
1030 // compute fee and subtract it from the accSender
1031 fee, err := common.CalcFeeAmount(tx.Amount, *tx.Fee)
1032 if err != nil {
1033 return nil, false, tracerr.Wrap(err)
1034 }
1035 feeAndAmount := new(big.Int).Add(tx.Amount, fee)
1036 acc.Balance = new(big.Int).Sub(acc.Balance, feeAndAmount)
1037
1038 if _, ok := coordIdxsMap[acc.TokenID]; ok {
1039 accCoord, err := tp.s.GetAccount(coordIdxsMap[acc.TokenID])
1040 if err != nil {
1041 return nil, false, tracerr.Wrap(fmt.Errorf("Can not use CoordIdx that does not exist in the tree. TokenID: %d, CoordIdx: %d", acc.TokenID, coordIdxsMap[acc.TokenID]))
1042 }
1043
1044 // accumulate the fee for the Coord account
1045 accumulated := tp.AccumulatedFees[accCoord.Idx]
1046 accumulated.Add(accumulated, fee)
1047
1048 if tp.s.Typ == statedb.TypeSynchronizer ||
1049 tp.s.Typ == statedb.TypeBatchBuilder {
1050 collected := collectedFees[accCoord.TokenID]
1051 collected.Add(collected, fee)
1052 }
1053 } else {
1054 log.Debugw("No coord Idx to receive fee", "tx", tx)
1055 }
1056 } else {
1057 acc.Balance = new(big.Int).Sub(acc.Balance, tx.Amount)
1058 }
1059
1060 p, err := tp.s.UpdateAccount(tx.FromIdx, acc)
1061 if err != nil {
1062 return nil, false, tracerr.Wrap(err)
1063 }
1064 if tp.zki != nil {
1065 tp.zki.Siblings1[tp.i] = siblingsToZKInputFormat(p.Siblings)
1066 }
1067
1068 if exitTree == nil {
1069 return nil, false, nil
1070 }
1071 exitAccount, err := statedb.GetAccountInTreeDB(exitTree.DB(), tx.FromIdx)
1072 if tracerr.Unwrap(err) == db.ErrNotFound {
1073 // 1a. if idx does not exist in exitTree:
1074 // add new leaf 'ExitTreeLeaf', where ExitTreeLeaf.Balance =
1075 // exitAmount (exitAmount=tx.Amount)
1076 exitAccount := &common.Account{
1077 TokenID: acc.TokenID,
1078 Nonce: common.Nonce(0),
1079 Balance: tx.Amount,
1080 BJJ: acc.BJJ,
1081 EthAddr: acc.EthAddr,
1082 }
1083 if tp.zki != nil {
1084 // Set the State2 before creating the Exit leaf
1085 tp.zki.TokenID2[tp.i] = acc.TokenID.BigInt()
1086 tp.zki.Nonce2[tp.i] = big.NewInt(0)
1087 accBJJSign, accBJJY := babyjub.UnpackSignY(acc.BJJ)
1088 if accBJJSign {
1089 tp.zki.Sign2[tp.i] = big.NewInt(1)
1090 }
1091 tp.zki.Ay2[tp.i] = accBJJY
1092 tp.zki.Balance2[tp.i] = tx.Amount
1093 tp.zki.EthAddr2[tp.i] = common.EthAddrToBigInt(acc.EthAddr)
1094 // as Leaf didn't exist in the ExitTree, set NewExit[i]=1
1095 tp.zki.NewExit[tp.i] = big.NewInt(1)
1096 }
1097 p, err = statedb.CreateAccountInTreeDB(exitTree.DB(), exitTree, tx.FromIdx, exitAccount)
1098 if err != nil {
1099 return nil, false, tracerr.Wrap(err)
1100 }
1101 if tp.zki != nil {
1102 tp.zki.Siblings2[tp.i] = siblingsToZKInputFormat(p.Siblings)
1103 if p.IsOld0 {
1104 tp.zki.IsOld0_2[tp.i] = big.NewInt(1)
1105 }
1106 tp.zki.OldKey2[tp.i] = p.OldKey.BigInt()
1107 tp.zki.OldValue2[tp.i] = p.OldValue.BigInt()
1108 tp.zki.ISExitRoot[tp.i] = exitTree.Root().BigInt()
1109 }
1110 return exitAccount, true, nil
1111 } else if err != nil {
1112 return exitAccount, false, tracerr.Wrap(err)
1113 }
1114 exitAccount.Nonce = exitAccount.Nonce + 1
1115
1116 // 1b. if idx already exist in exitTree:
1117 if tp.zki != nil {
1118 // Set the State2 before updating the Exit leaf
1119 tp.zki.TokenID2[tp.i] = acc.TokenID.BigInt()
1120 // increment nonce from existing ExitLeaf
1121 tp.zki.Nonce2[tp.i] = exitAccount.Nonce.BigInt()
1122 accBJJSign, accBJJY := babyjub.UnpackSignY(acc.BJJ)
1123 if accBJJSign {
1124 tp.zki.Sign2[tp.i] = big.NewInt(1)
1125 }
1126 tp.zki.Ay2[tp.i] = accBJJY
1127 tp.zki.Balance2[tp.i] = tx.Amount
1128 tp.zki.EthAddr2[tp.i] = common.EthAddrToBigInt(acc.EthAddr)
1129 }
1130
1131 // update account, where account.Balance += exitAmount
1132 exitAccount.Balance = new(big.Int).Add(exitAccount.Balance, tx.Amount)
1133 p, err = statedb.UpdateAccountInTreeDB(exitTree.DB(), exitTree, tx.FromIdx, exitAccount)
1134 if err != nil {
1135 return nil, false, tracerr.Wrap(err)
1136 }
1137
1138 if tp.zki != nil {
1139 tp.zki.Siblings2[tp.i] = siblingsToZKInputFormat(p.Siblings)
1140 if p.IsOld0 {
1141 tp.zki.IsOld0_2[tp.i] = big.NewInt(1)
1142 }
1143 tp.zki.OldKey2[tp.i] = p.OldKey.BigInt()
1144 tp.zki.OldValue2[tp.i] = p.OldValue.BigInt()
1145 }
1146
1147 return exitAccount, false, nil
1148}
1149
1150// computeEffectiveAmounts checks that the L1Tx data is correct
1151func (tp *TxProcessor) computeEffectiveAmounts(tx *common.L1Tx) {
1152 tx.EffectiveAmount = tx.Amount
1153 tx.EffectiveDepositAmount = tx.DepositAmount
1154
1155 if !tx.UserOrigin {
1156 // case where the L1Tx is generated by the Coordinator
1157 tx.EffectiveAmount = big.NewInt(0)
1158 tx.EffectiveDepositAmount = big.NewInt(0)
1159 return
1160 }
1161
1162 if tx.Type == common.TxTypeCreateAccountDeposit {
1163 return
1164 }
1165
1166 if tx.ToIdx >= common.UserThreshold && tx.FromIdx == common.Idx(0) {
1167 // CreateAccountDepositTransfer case
1168 cmp := tx.DepositAmount.Cmp(tx.Amount)
1169 if cmp == -1 { // DepositAmount<Amount
1170 tx.EffectiveAmount = big.NewInt(0)
1171 return
1172 }
1173
1174 // check if tx.TokenID==receiver.TokenID
1175 accReceiver, err := tp.s.GetAccount(tx.ToIdx)
1176 if err != nil {
1177 log.Debugf("EffectiveAmount & EffectiveDepositAmount = 0: can not get account for tx.ToIdx: %d", tx.ToIdx)
1178 tx.EffectiveDepositAmount = big.NewInt(0)
1179 tx.EffectiveAmount = big.NewInt(0)
1180 return
1181 }
1182 if tx.TokenID != accReceiver.TokenID {
1183 log.Debugf("EffectiveAmount = 0: tx TokenID (%d) != receiver account TokenID (%d)", tx.TokenID, accReceiver.TokenID)
1184 tx.EffectiveAmount = big.NewInt(0)
1185 return
1186 }
1187 return
1188 }
1189
1190 accSender, err := tp.s.GetAccount(tx.FromIdx)
1191 if err != nil {
1192 log.Debugf("EffectiveAmount & EffectiveDepositAmount = 0: can not get account for tx.FromIdx: %d", tx.FromIdx)
1193 tx.EffectiveDepositAmount = big.NewInt(0)
1194 tx.EffectiveAmount = big.NewInt(0)
1195 return
1196 }
1197
1198 // check that tx.TokenID corresponds to the Sender account TokenID
1199 if tx.TokenID != accSender.TokenID {
1200 log.Debugf("EffectiveAmount & EffectiveDepositAmount = 0: tx.TokenID (%d) !=sender account TokenID (%d)", tx.TokenID, accSender.TokenID)
1201 tx.EffectiveDepositAmount = big.NewInt(0)
1202 tx.EffectiveAmount = big.NewInt(0)
1203 return
1204 }
1205
1206 // check that Sender has enough balance
1207 bal := accSender.Balance
1208 if tx.DepositAmount != nil {
1209 bal = new(big.Int).Add(bal, tx.EffectiveDepositAmount)
1210 }
1211 cmp := bal.Cmp(tx.Amount)
1212 if cmp == -1 {
1213 log.Debugf("EffectiveAmount = 0: Not enough funds (%s<%s)", bal.String(), tx.Amount.String())
1214 tx.EffectiveAmount = big.NewInt(0)
1215 return
1216 }
1217
1218 // check that the tx.FromEthAddr is the same than the EthAddress of the
1219 // Sender
1220 if !bytes.Equal(tx.FromEthAddr.Bytes(), accSender.EthAddr.Bytes()) {
1221 log.Debugf("EffectiveAmount = 0: tx.FromEthAddr (%s) must be the same EthAddr of the sender account by the Idx (%s)", tx.FromEthAddr.Hex(), accSender.EthAddr.Hex())
1222 tx.EffectiveAmount = big.NewInt(0)
1223 }
1224
1225 if tx.ToIdx == common.Idx(1) || tx.ToIdx == common.Idx(0) {
1226 // if transfer is Exit type, there are no more checks
1227 return
1228 }
1229
1230 // check that TokenID is the same for Sender & Receiver account
1231 accReceiver, err := tp.s.GetAccount(tx.ToIdx)
1232 if err != nil {
1233 log.Debugf("EffectiveAmount & EffectiveDepositAmount = 0: can not get account for tx.ToIdx: %d", tx.ToIdx)
1234 tx.EffectiveDepositAmount = big.NewInt(0)
1235 tx.EffectiveAmount = big.NewInt(0)
1236 return
1237 }
1238 if accSender.TokenID != accReceiver.TokenID {
1239 log.Debugf("EffectiveAmount = 0: sender account TokenID (%d) != receiver account TokenID (%d)", accSender.TokenID, accReceiver.TokenID)
1240 tx.EffectiveAmount = big.NewInt(0)
1241 return
1242 }
1243 if tx.TokenID != accReceiver.TokenID {
1244 log.Debugf("EffectiveAmount & EffectiveDepositAmount = 0: tx TokenID (%d) != receiver account TokenID (%d)", tx.TokenID, accReceiver.TokenID)
1245 tx.EffectiveAmount = big.NewInt(0)
1246 return
1247 }
1248}