Implement Pipeline.prepareForgeBatchArgs()

- Implement Pipeline.prepareForgeBatchArgs()
- Add a minimal stress test for the coordinator (that also runs the
  synchronizer)
- Update txprocessor.ProcessTxs() to return valid results for batches without
  transactions
  	- Add the boilerplate for the corresponding test, leaving as TODO the
	  zkInput values
- Update prover client to use the same point format as proof server (projective)
- Update interface of TxSelector.GetCoordIdxs to also return the authorizations
  to create accounts that go with the l1CoordinatorTxs.

coordinator/batch.go

@@ -26,15 +26,18 @@ const (
 
 // BatchInfo contans the Batch information
 type BatchInfo struct {
-	BatchNum       common.BatchNum
-	ServerProof    prover.Client
-	ZKInputs       *common.ZKInputs
-	Proof          *prover.Proof
-	PublicInputs   []*big.Int
-	L1UserTxsExtra []common.L1Tx
-	L1CoordTxs     []common.L1Tx
-	L2Txs          []common.PoolL2Tx
-	ForgeBatchArgs *eth.RollupForgeBatchArgs
+	BatchNum              common.BatchNum
+	ServerProof           prover.Client
+	ZKInputs              *common.ZKInputs
+	Proof                 *prover.Proof
+	PublicInputs          []*big.Int
+	L1Batch               bool
+	L1UserTxsExtra        []common.L1Tx
+	L1CoordTxs            []common.L1Tx
+	L1CoordinatorTxsAuths [][]byte
+	L2Txs                 []common.L2Tx
+	CoordIdxs             []common.Idx
+	ForgeBatchArgs        *eth.RollupForgeBatchArgs
 	// FeesInfo
 	TxStatus TxStatus
 	EthTx    *types.Transaction

coordinator/coordinator.go

@@ -3,6 +3,7 @@ package coordinator
 import (
 	"context"
 	"fmt"
+	"math/big"
 	"strings"
 	"sync"
 	"time"
@@ -772,7 +773,15 @@ func (p *Pipeline) Stop(ctx context.Context) {
 	}
 }
 
-func l2TxsIDs(txs []common.PoolL2Tx) []common.TxID {
+func poolL2TxsIDs(txs []common.PoolL2Tx) []common.TxID {
+	txIDs := make([]common.TxID, len(txs))
+	for i, tx := range txs {
+		txIDs[i] = tx.TxID
+	}
+	return txIDs
+}
+
+func l2TxsIDs(txs []common.L2Tx) []common.TxID {
 	txIDs := make([]common.TxID, len(txs))
 	for i, tx := range txs {
 		txIDs[i] = tx.TxID
@@ -810,9 +819,11 @@ func (p *Pipeline) forgeBatch(ctx context.Context, batchNum common.BatchNum, sel
 	var poolL2Txs []common.PoolL2Tx
 	// var feesInfo
 	var l1UserTxsExtra, l1CoordTxs []common.L1Tx
+	var auths [][]byte
 	var coordIdxs []common.Idx
 	// 1. Decide if we forge L2Tx or L1+L2Tx
 	if p.shouldL1L2Batch() {
+		batchInfo.L1Batch = true
 		p.lastScheduledL1BatchBlockNum = p.stats.Eth.LastBlock.Num
 		// 2a: L1+L2 txs
 		p.lastForgeL1TxsNum++
@@ -821,14 +832,14 @@ func (p *Pipeline) forgeBatch(ctx context.Context, batchNum common.BatchNum, sel
 			return nil, tracerr.Wrap(err)
 		}
 		// TODO once feesInfo is added to method return, add the var
-		coordIdxs, l1UserTxsExtra, l1CoordTxs, poolL2Txs, err =
+		coordIdxs, auths, l1UserTxsExtra, l1CoordTxs, poolL2Txs, err =
 			p.txSelector.GetL1L2TxSelection(selectionConfig, batchNum, l1UserTxs)
 		if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
 	} else {
 		// 2b: only L2 txs
-		coordIdxs, l1CoordTxs, poolL2Txs, err =
+		coordIdxs, auths, l1CoordTxs, poolL2Txs, err =
 			p.txSelector.GetL2TxSelection(selectionConfig, batchNum)
 		if err != nil {
 			return nil, tracerr.Wrap(err)
@@ -840,9 +851,10 @@ func (p *Pipeline) forgeBatch(ctx context.Context, batchNum common.BatchNum, sel
 	// TODO feesInfo
 	batchInfo.L1UserTxsExtra = l1UserTxsExtra
 	batchInfo.L1CoordTxs = l1CoordTxs
-	batchInfo.L2Txs = poolL2Txs
+	batchInfo.L1CoordinatorTxsAuths = auths
+	batchInfo.CoordIdxs = coordIdxs
 
-	if err := p.l2DB.StartForging(l2TxsIDs(batchInfo.L2Txs), batchInfo.BatchNum); err != nil {
+	if err := p.l2DB.StartForging(poolL2TxsIDs(poolL2Txs), batchInfo.BatchNum); err != nil {
 		return nil, tracerr.Wrap(err)
 	}
 
@@ -864,6 +876,11 @@ func (p *Pipeline) forgeBatch(ctx context.Context, batchNum common.BatchNum, sel
 	if err != nil {
 		return nil, tracerr.Wrap(err)
 	}
+	l2Txs, err := common.PoolL2TxsToL2Txs(poolL2Txs) // NOTE: This is a big uggly, find a better way
+	if err != nil {
+		return nil, tracerr.Wrap(err)
+	}
+	batchInfo.L2Txs = l2Txs
 
 	// 5. Save metadata from BatchBuilder output for BatchNum
 	batchInfo.ZKInputs = zkInputs
@@ -903,6 +920,25 @@ func (p *Pipeline) shouldL1L2Batch() bool {
 }
 
 func (p *Pipeline) prepareForgeBatchArgs(batchInfo *BatchInfo) *eth.RollupForgeBatchArgs {
-	// TODO
-	return &eth.RollupForgeBatchArgs{}
+	proof := batchInfo.Proof
+	zki := batchInfo.ZKInputs
+	return &eth.RollupForgeBatchArgs{
+		NewLastIdx:            int64(zki.Metadata.NewLastIdxRaw),
+		NewStRoot:             zki.Metadata.NewStateRootRaw.BigInt(),
+		NewExitRoot:           zki.Metadata.NewExitRootRaw.BigInt(),
+		L1UserTxs:             batchInfo.L1UserTxsExtra,
+		L1CoordinatorTxs:      batchInfo.L1CoordTxs,
+		L1CoordinatorTxsAuths: batchInfo.L1CoordinatorTxsAuths,
+		L2TxsData:             batchInfo.L2Txs,
+		FeeIdxCoordinator:     batchInfo.CoordIdxs,
+		// Circuit selector
+		VerifierIdx: 0, // TODO
+		L1Batch:     batchInfo.L1Batch,
+		ProofA:      [2]*big.Int{proof.PiA[0], proof.PiA[1]},
+		ProofB: [2][2]*big.Int{
+			{proof.PiB[0][0], proof.PiB[0][1]},
+			{proof.PiB[1][0], proof.PiB[1][1]},
+		},
+		ProofC: [2]*big.Int{proof.PiC[0], proof.PiC[1]},
+	}
 }

coordinator/coordinator_test.go

@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"math/big"
 	"os"
+	"sync"
 	"testing"
 	"time"
 
@@ -157,11 +158,21 @@ func newTestCoordinator(t *testing.T, forgerAddr ethCommon.Address, ethClient *t
 		ConfirmBlocks:          5,
 		L1BatchTimeoutPerc:     0.5,
 		EthClientAttempts:      5,
+		SyncRetryInterval:      400 * time.Microsecond,
 		EthClientAttemptsDelay: 100 * time.Millisecond,
 		TxManagerCheckInterval: 300 * time.Millisecond,
 		DebugBatchPath:         debugBatchPath,
+		Purger: PurgerCfg{
+			PurgeBatchDelay:      10,
+			PurgeBlockDelay:      10,
+			InvalidateBatchDelay: 4,
+			InvalidateBlockDelay: 4,
+		},
+	}
+	serverProofs := []prover.Client{
+		&prover.MockClient{Delay: 300 * time.Millisecond},
+		&prover.MockClient{Delay: 400 * time.Millisecond},
 	}
-	serverProofs := []prover.Client{&prover.MockClient{}, &prover.MockClient{}}
 
 	scConsts := &synchronizer.SCConsts{
 		Rollup:   *ethClientSetup.RollupConstants,
@@ -628,6 +639,70 @@ PoolTransfer(0) User2-User3: 300 (126)
 	assert.Equal(t, 0, len(batchInfo.L2Txs))
 }
 
+func TestCoordinatorStress(t *testing.T) {
+	if os.Getenv("TEST_COORD_STRESS") == "" {
+		return
+	}
+	log.Info("Begin Test Coord Stress")
+	ethClientSetup := test.NewClientSetupExample()
+	var timer timer
+	ethClient := test.NewClient(true, &timer, &bidder, ethClientSetup)
+	modules := newTestModules(t)
+	coord := newTestCoordinator(t, forger, ethClient, ethClientSetup, modules)
+	syn := newTestSynchronizer(t, ethClient, ethClientSetup, modules)
+
+	coord.Start()
+	ctx, cancel := context.WithCancel(context.Background())
+	var wg sync.WaitGroup
+
+	// Synchronizer loop
+	wg.Add(1)
+	go func() {
+		for {
+			blockData, _, err := syn.Sync2(ctx, nil)
+			if ctx.Err() != nil {
+				wg.Done()
+				return
+			}
+			require.NoError(t, err)
+			if blockData != nil {
+				stats := syn.Stats()
+				coord.SendMsg(MsgSyncBlock{
+					Stats:   *stats,
+					Batches: blockData.Rollup.Batches,
+					Vars: synchronizer.SCVariablesPtr{
+						Rollup:   blockData.Rollup.Vars,
+						Auction:  blockData.Auction.Vars,
+						WDelayer: blockData.WDelayer.Vars,
+					},
+				})
+			} else {
+				time.Sleep(100 * time.Millisecond)
+			}
+		}
+	}()
+
+	// Blockchain mining loop
+	wg.Add(1)
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				wg.Done()
+				return
+			case <-time.After(100 * time.Millisecond):
+				ethClient.CtlMineBlock()
+			}
+		}
+	}()
+
+	time.Sleep(600 * time.Second)
+
+	cancel()
+	wg.Wait()
+	coord.Stop()
+}
+
 // TODO: Test Reorg
 // TODO: Test Pipeline
 // TODO: Test TxMonitor

db/statedb/txprocessors.go

@@ -82,16 +82,6 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	s.accumulatedFees = make(map[common.Idx]*big.Int)
 
 	nTx := len(l1usertxs) + len(l1coordinatortxs) + len(l2txs)
-	if nTx == 0 {
-		// TODO return ZKInputs of batch without txs
-		return &ProcessTxOutput{
-			ZKInputs:           nil,
-			ExitInfos:          nil,
-			CreatedAccounts:    nil,
-			CoordinatorIdxsMap: nil,
-			CollectedFees:      nil,
-		}, nil
-	}
 
 	if nTx > int(ptc.MaxTx) {
 		return nil, tracerr.Wrap(fmt.Errorf("L1UserTx + L1CoordinatorTx + L2Tx (%d) can not be bigger than MaxTx (%d)", nTx, ptc.MaxTx))
@@ -272,7 +262,11 @@ func (s *StateDB) ProcessTxs(ptc ProcessTxsConfig, coordIdxs []common.Idx, l1use
 	}
 
 	if s.zki != nil {
-		for i := s.i - 1; i < int(ptc.MaxTx); i++ {
+		last := s.i - 1
+		if s.i == 0 {
+			last = 0
+		}
+		for i := last; i < int(ptc.MaxTx); i++ {
 			if i < int(ptc.MaxTx)-1 {
 				s.zki.ISOutIdx[i] = s.idx.BigInt()
 				s.zki.ISStateRoot[i] = s.mt.Root().BigInt()

db/statedb/zkinputsgen_test.go

@@ -240,6 +240,143 @@ func TestZKInputsHashTestVector1(t *testing.T) {
 	assert.Equal(t, "20293112365009290386650039345314592436395562810005523677125576447132206192598", h.String())
 }
 
+// TestZKInputsEmpty:
+// tests:
+// - L1: empty
+// - L2: empty
+func TestZKInputsEmpty(t *testing.T) {
+	dir, err := ioutil.TempDir("", "tmpdb")
+	require.Nil(t, err)
+	defer assert.Nil(t, os.RemoveAll(dir))
+
+	nLevels := 16
+
+	sdb, err := NewStateDB(dir, TypeBatchBuilder, nLevels)
+	assert.Nil(t, err)
+
+	ptc := ProcessTxsConfig{
+		NLevels:  uint32(nLevels),
+		MaxTx:    10,
+		MaxL1Tx:  5,
+		MaxFeeTx: 2,
+	}
+
+	// 0. Generate a batch from the empty state with no transactions
+
+	coordIdxs := []common.Idx{}
+	l1UserTxs := []common.L1Tx{}
+	l1CoordTxs := []common.L1Tx{}
+	l2Txs := []common.PoolL2Tx{}
+
+	ptOut, err := sdb.ProcessTxs(ptc, coordIdxs, l1UserTxs, l1CoordTxs, l2Txs)
+	require.Nil(t, err)
+
+	assert.Equal(t, "0", sdb.mt.Root().BigInt().String())
+	assert.Equal(t, "0", ptOut.ZKInputs.Metadata.NewExitRootRaw.BigInt().String())
+
+	// check that there are no accounts
+	accs, err := sdb.GetAccounts()
+	require.NoError(t, err)
+	assert.Equal(t, 0, len(accs))
+
+	/* // TODO
+	h, err := ptOut.ZKInputs.HashGlobalData()
+	require.Nil(t, err)
+	assert.Equal(t, "TODO", h.String())
+
+	toHash, err := ptOut.ZKInputs.ToHashGlobalData()
+	require.Nil(t, err)
+	assert.Equal(t, "TODO", hex.EncodeToString(toHash))
+
+	s, err := json.Marshal(ptOut.ZKInputs)
+	require.Nil(t, err)
+	// the 'expected' data has been checked with the circom circuits
+	expected := `TODO`
+	assert.Equal(t, expected, string(s))
+	*/
+
+	// 1. Generate a batch with two transactions that create one account
+	// so that the state tree is not empty (same transactions as
+	// TestZKInputs0)
+
+	// same values than in the js test
+	users := generateJsUsers(t)
+
+	l1UserTxs = []common.L1Tx{
+		{
+			FromIdx:       0,
+			DepositAmount: big.NewInt(16000000),
+			Amount:        big.NewInt(0),
+			TokenID:       1,
+			FromBJJ:       users[0].BJJ.Public().Compress(),
+			FromEthAddr:   users[0].Addr,
+			ToIdx:         0,
+			Type:          common.TxTypeCreateAccountDeposit,
+			UserOrigin:    true,
+		},
+	}
+	l2Txs = []common.PoolL2Tx{
+		{
+			FromIdx: 256,
+			ToIdx:   256,
+			TokenID: 1,
+			Amount:  big.NewInt(1000),
+			Nonce:   0,
+			Fee:     0,
+			Type:    common.TxTypeTransfer,
+		},
+	}
+
+	toSign, err := l2Txs[0].HashToSign()
+	require.Nil(t, err)
+	sig := users[0].BJJ.SignPoseidon(toSign)
+	l2Txs[0].Signature = sig.Compress()
+
+	_, err = sdb.ProcessTxs(ptc, nil, l1UserTxs, nil, l2Txs)
+	require.Nil(t, err)
+
+	rootNonZero := sdb.mt.Root()
+
+	// check that there is 1 account
+	accs, err = sdb.GetAccounts()
+	require.NoError(t, err)
+	assert.Equal(t, 1, len(accs))
+
+	// 2. Generate a batch from a non-empty state with no transactions
+
+	coordIdxs = []common.Idx{}
+	l1UserTxs = []common.L1Tx{}
+	l1CoordTxs = []common.L1Tx{}
+	l2Txs = []common.PoolL2Tx{}
+
+	ptOut, err = sdb.ProcessTxs(ptc, coordIdxs, l1UserTxs, l1CoordTxs, l2Txs)
+	require.Nil(t, err)
+
+	assert.Equal(t, rootNonZero, sdb.mt.Root())
+	assert.Equal(t, "0", ptOut.ZKInputs.Metadata.NewExitRootRaw.BigInt().String())
+
+	// check that there is still 1 account
+	accs, err = sdb.GetAccounts()
+	require.NoError(t, err)
+	assert.Equal(t, 1, len(accs))
+
+	/* // TODO
+	h, err := ptOut.ZKInputs.HashGlobalData()
+	require.Nil(t, err)
+	assert.Equal(t, "TODO", h.String())
+
+	toHash, err := ptOut.ZKInputs.ToHashGlobalData()
+	require.Nil(t, err)
+	assert.Equal(t, "TODO", hex.EncodeToString(toHash))
+
+	s, err := json.Marshal(ptOut.ZKInputs)
+	require.Nil(t, err)
+	// the 'expected' data has been checked with the circom circuits
+	expected := `TODO`
+	assert.Equal(t, expected, string(s))
+	*/
+}
+
 // TestZKInputs0:
 // tests:
 // - L1: CreateAccountDeposit

prover/prover.go

@@ -16,9 +16,9 @@ import (
 
 // Proof TBD this type will be received from the proof server
 type Proof struct {
-	PiA      [2]*big.Int    `json:"pi_a"`
+	PiA      [3]*big.Int    `json:"pi_a"`
 	PiB      [3][2]*big.Int `json:"pi_b"`
-	PiC      [2]*big.Int    `json:"pi_c"`
+	PiC      [3]*big.Int    `json:"pi_c"`
 	Protocol string         `json:"protocol"`
 }
 
@@ -36,9 +36,9 @@ func (b *bigInt) UnmarshalText(text []byte) error {
 // ints as strings
 func (p *Proof) UnmarshalJSON(data []byte) error {
 	proof := struct {
-		PiA      [2]*bigInt    `json:"pi_a"`
+		PiA      [3]*bigInt    `json:"pi_a"`
 		PiB      [3][2]*bigInt `json:"pi_b"`
-		PiC      [2]*bigInt    `json:"pi_c"`
+		PiC      [3]*bigInt    `json:"pi_c"`
 		Protocol string        `json:"protocol"`
 	}{}
 	if err := json.Unmarshal(data, &proof); err != nil {
@@ -46,14 +46,26 @@ func (p *Proof) UnmarshalJSON(data []byte) error {
 	}
 	p.PiA[0] = (*big.Int)(proof.PiA[0])
 	p.PiA[1] = (*big.Int)(proof.PiA[1])
+	p.PiA[2] = (*big.Int)(proof.PiA[2])
+	if p.PiA[2].Int64() != 1 {
+		return fmt.Errorf("Expected PiA[2] == 1, but got %v", p.PiA[2])
+	}
 	p.PiB[0][0] = (*big.Int)(proof.PiB[0][0])
 	p.PiB[0][1] = (*big.Int)(proof.PiB[0][1])
 	p.PiB[1][0] = (*big.Int)(proof.PiB[1][0])
 	p.PiB[1][1] = (*big.Int)(proof.PiB[1][1])
 	p.PiB[2][0] = (*big.Int)(proof.PiB[2][0])
 	p.PiB[2][1] = (*big.Int)(proof.PiB[2][1])
+	if p.PiB[2][0].Int64() != 1 || p.PiB[2][1].Int64() != 0 {
+		return fmt.Errorf("Expected PiB[2] == [1, 0], but got %v", p.PiB[2])
+	}
 	p.PiC[0] = (*big.Int)(proof.PiC[0])
 	p.PiC[1] = (*big.Int)(proof.PiC[1])
+	p.PiC[2] = (*big.Int)(proof.PiC[2])
+	if p.PiC[2].Int64() != 1 {
+		return fmt.Errorf("Expected PiC[2] == 1, but got %v", p.PiC[2])
+	}
+	// TODO: Assert ones and zeroes
 	p.Protocol = proof.Protocol
 	return nil
 }
@@ -276,6 +288,7 @@ func (p *ProofServerClient) WaitReady(ctx context.Context) error {
 
 // MockClient is a mock ServerProof to be used in tests.  It doesn't calculate anything
 type MockClient struct {
+	Delay time.Duration
 }
 
 // CalculateProof sends the *common.ZKInputs to the ServerProof to compute the
@@ -288,7 +301,7 @@ func (p *MockClient) CalculateProof(ctx context.Context, zkInputs *common.ZKInpu
 func (p *MockClient) GetProof(ctx context.Context) (*Proof, []*big.Int, error) {
 	// Simulate a delay
 	select {
-	case <-time.After(500 * time.Millisecond): //nolint:gomnd
+	case <-time.After(p.Delay): //nolint:gomnd
 		return &Proof{}, []*big.Int{big.NewInt(1234)}, nil //nolint:gomnd
 	case <-ctx.Done():
 		return nil, nil, tracerr.Wrap(common.ErrDone)

prover/prover_test.go

@@ -12,7 +12,8 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-const apiURL = "http://localhost:3000/api"
+var apiURL = "http://localhost:3000/api"
+
 const pollInterval = 1 * time.Second
 
 var proofServerClient *ProofServerClient
@@ -20,6 +21,10 @@ var proofServerClient *ProofServerClient
 func TestMain(m *testing.M) {
 	exitVal := 0
 	if os.Getenv("INTEGRATION") != "" {
+		_apiURL := os.Getenv("PROOF_SERVER_URL")
+		if _apiURL != "" {
+			apiURL = _apiURL
+		}
 		proofServerClient = NewProofServerClient(apiURL, pollInterval)
 		err := proofServerClient.WaitReady(context.Background())
 		if err != nil {

test/proofserver/proofserver.go

@@ -67,6 +67,50 @@ func (s *Mock) handleCancel(c *gin.Context) {
 	c.JSON(http.StatusOK, "OK")
 }
 
+/* Status example from the real server proof:
+
+Status:
+{
+  "proof": "{\n    \"pi_a\": [\n        \"1368015179489954701390400359078579693043519447331113978918064868415326638035\",\n        \"9918110051302171585080402603319702774565515993150576347155970296011118125764\",\n        \"1\"\n    ],\n    \"pi_b\": [\n        [\n            \"10857046999023057135944570762232829481370756359578518086990519993285655852781\",\n            \"11559732032986387107991004021392285783925812861821192530917403151452391805634\"\n        ],\n        [\n            \"8495653923123431417604973247489272438418190587263600148770280649306958101930\",\n            \"4082367875863433681332203403145435568316851327593401208105741076214120093531\"\n        ],\n        [\n            \"1\",\n            \"0\"\n        ]\n    ],\n    \"pi_c\": [\n        \"1368015179489954701390400359078579693043519447331113978918064868415326638035\",\n        \"9918110051302171585080402603319702774565515993150576347155970296011118125764\",\n        \"1\"\n    ],\n    \"protocol\": \"groth\"\n}\n",
+  "pubData": "[\n    \"8863150934551775031093873719629424744398133643983814385850330952980893030086\"\n]\n",
+  "status": "success"
+}
+
+proof:
+{
+    "pi_a": [
+        "1368015179489954701390400359078579693043519447331113978918064868415326638035",
+        "9918110051302171585080402603319702774565515993150576347155970296011118125764",
+        "1"
+    ],
+    "pi_b": [
+        [
+            "10857046999023057135944570762232829481370756359578518086990519993285655852781",
+            "11559732032986387107991004021392285783925812861821192530917403151452391805634"
+        ],
+        [
+            "8495653923123431417604973247489272438418190587263600148770280649306958101930",
+            "4082367875863433681332203403145435568316851327593401208105741076214120093531"
+        ],
+        [
+            "1",
+            "0"
+        ]
+    ],
+    "pi_c": [
+        "1368015179489954701390400359078579693043519447331113978918064868415326638035",
+        "9918110051302171585080402603319702774565515993150576347155970296011118125764",
+        "1"
+    ],
+    "protocol": "groth"
+}
+
+pubData:
+[
+    "8863150934551775031093873719629424744398133643983814385850330952980893030086"
+]
+*/
+
 func (s *Mock) handleStatus(c *gin.Context) {
 	s.RLock()
 	c.JSON(http.StatusOK, prover.Status{
@@ -133,11 +177,11 @@ func (s *Mock) runProver(ctx context.Context) {
 			s.counter++
 			// Mock data
 			s.proof = fmt.Sprintf(`{
-				"pi_a": ["%v", "%v"],
-				"pi_b": [["%v", "%v"],["%v", "%v"],["%v", "%v"]],
-				"pi_c": ["%v", "%v"],
+				"pi_a": ["%v", "%v", "1"],
+				"pi_b": [["%v", "%v"],["%v", "%v"],["1", "0"]],
+				"pi_c": ["%v", "%v", "1"],
 				"protocol": "groth16"
-			}`, i, i+1, i+2, i+3, i+4, i+5, i+6, i+7, i+8, i+9) //nolint:gomnd
+			}`, i, i+1, i+2, i+3, i+4, i+5, i+6, i+7) //nolint:gomnd
 			s.pubData = fmt.Sprintf(`[
 				"%v"
 			]`, i+42) //nolint:gomnd

txselector/txselector.go

@@ -151,15 +151,15 @@ func (txsel *TxSelector) GetCoordIdxs() (map[common.TokenID]common.Idx, error) {
 // GetL2TxSelection returns the L1CoordinatorTxs and a selection of the L2Txs
 // for the next batch, from the L2DB pool
 func (txsel *TxSelector) GetL2TxSelection(selectionConfig *SelectionConfig,
-	batchNum common.BatchNum) ([]common.Idx, []common.L1Tx, []common.PoolL2Tx, error) {
-	coordIdxs, _, l1CoordinatorTxs, l2Txs, err := txsel.GetL1L2TxSelection(selectionConfig, batchNum,
+	batchNum common.BatchNum) ([]common.Idx, [][]byte, []common.L1Tx, []common.PoolL2Tx, error) {
+	coordIdxs, auths, _, l1CoordinatorTxs, l2Txs, err := txsel.GetL1L2TxSelection(selectionConfig, batchNum,
 		[]common.L1Tx{})
-	return coordIdxs, l1CoordinatorTxs, l2Txs, tracerr.Wrap(err)
+	return coordIdxs, auths, l1CoordinatorTxs, l2Txs, tracerr.Wrap(err)
 }
 
 // GetL1L2TxSelection returns the selection of L1 + L2 txs
 func (txsel *TxSelector) GetL1L2TxSelection(selectionConfig *SelectionConfig,
-	batchNum common.BatchNum, l1Txs []common.L1Tx) ([]common.Idx, []common.L1Tx, []common.L1Tx,
+	batchNum common.BatchNum, l1Txs []common.L1Tx) ([]common.Idx, [][]byte, []common.L1Tx, []common.L1Tx,
 	[]common.PoolL2Tx, error) {
 	// apply l1-user-tx to localAccountDB
 	//     create new leaves
@@ -169,7 +169,7 @@ func (txsel *TxSelector) GetL1L2TxSelection(selectionConfig *SelectionConfig,
 	// get existing CoordIdxs
 	coordIdxsMap, err := txsel.GetCoordIdxs()
 	if err != nil {
-		return nil, nil, nil, nil, tracerr.Wrap(err)
+		return nil, nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	var coordIdxs []common.Idx
 	for tokenID := range coordIdxsMap {
@@ -179,7 +179,7 @@ func (txsel *TxSelector) GetL1L2TxSelection(selectionConfig *SelectionConfig,
 	// get pending l2-tx from tx-pool
 	l2TxsRaw, err := txsel.l2db.GetPendingTxs() // (batchID)
 	if err != nil {
-		return nil, nil, nil, nil, tracerr.Wrap(err)
+		return nil, nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 
 	var validTxs txs
@@ -235,14 +235,19 @@ func (txsel *TxSelector) GetL1L2TxSelection(selectionConfig *SelectionConfig,
 	// process the txs in the local AccountsDB
 	_, err = txsel.localAccountsDB.ProcessTxs(ptc, coordIdxs, l1Txs, l1CoordinatorTxs, l2Txs)
 	if err != nil {
-		return nil, nil, nil, nil, tracerr.Wrap(err)
+		return nil, nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 	err = txsel.localAccountsDB.MakeCheckpoint()
 	if err != nil {
-		return nil, nil, nil, nil, tracerr.Wrap(err)
+		return nil, nil, nil, nil, nil, tracerr.Wrap(err)
 	}
 
-	return nil, l1Txs, l1CoordinatorTxs, l2Txs, nil
+	// TODO
+	auths := make([][]byte, len(l1CoordinatorTxs))
+	for i := range auths {
+		auths[i] = make([]byte, 65)
+	}
+	return nil, auths, l1Txs, l1CoordinatorTxs, l2Txs, nil
 }
 
 // processTxsToEthAddrBJJ process the common.PoolL2Tx in the case where

txselector/txselector_test.go

@@ -133,12 +133,12 @@ func TestGetL2TxSelection(t *testing.T) {
 	// add the 1st batch of transactions to the TxSelector
 	addL2Txs(t, txsel, common.L2TxsToPoolL2Txs(blocks[0].Rollup.Batches[0].L2Txs))
 
-	_, l1CoordTxs, l2Txs, err := txsel.GetL2TxSelection(selectionConfig, 0)
+	_, _, l1CoordTxs, l2Txs, err := txsel.GetL2TxSelection(selectionConfig, 0)
 	assert.NoError(t, err)
 	assert.Equal(t, 0, len(l2Txs))
 	assert.Equal(t, 0, len(l1CoordTxs))
 
-	_, _, _, _, err = txsel.GetL1L2TxSelection(selectionConfig, 0, blocks[0].Rollup.L1UserTxs)
+	_, _, _, _, _, err = txsel.GetL1L2TxSelection(selectionConfig, 0, blocks[0].Rollup.L1UserTxs)
 	assert.NoError(t, err)
 
 	// TODO once L2DB is updated to return error in case that AddTxTest