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