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