@@ -24,7 +24,8 @@ }
 
 // ConfigBatch contains the batch configuration
 type ConfigBatch struct {
-	ForgerAddress ethCommon.Address
+	ForgerAddress     ethCommon.Address
+	TxProcessorConfig txprocessor.Config
 }
 
 // NewBatchBuilder constructs a new BatchBuilder, and executes the bb.Reset
@@ -54,17 +55,11 @@ return bb.localStateDB.Reset(batchNum, fromSynchronizer)
 }
 
 // BuildBatch takes the transactions and returns the common.ZKInputs of the next batch
-func (bb *BatchBuilder) BuildBatch(coordIdxs []common.Idx, configBatch *ConfigBatch, l1usertxs, l1coordinatortxs []common.L1Tx, pooll2txs []common.PoolL2Tx, tokenIDs []common.TokenID) (*common.ZKInputs, error) {
-	//nolint:gomnd
-	tpc := txprocessor.Config{ // TODO TMP
-		NLevels:  32,
-		MaxFeeTx: 64,
-		MaxTx:    512,
-		MaxL1Tx:  64,
-		ChainID:  uint16(0),
-	}
+func (bb *BatchBuilder) BuildBatch(coordIdxs []common.Idx, configBatch *ConfigBatch, l1usertxs,
+	l1coordinatortxs []common.L1Tx, pooll2txs []common.PoolL2Tx,
+	tokenIDs []common.TokenID) (*common.ZKInputs, error) {
 	bbStateDB := bb.localStateDB.StateDB
-	tp := txprocessor.NewTxProcessor(bbStateDB, tpc)
+	tp := txprocessor.NewTxProcessor(bbStateDB, configBatch.TxProcessorConfig)
 
 	ptOut, err := tp.ProcessTxs(coordIdxs, l1usertxs, l1coordinatortxs, pooll2txs)
 	return ptOut.ZKInputs, tracerr.Wrap(err)

@@ -63,6 +63,10 @@
 [[Coordinator.ServerProofs]]
 URL = "http://localhost:3000/api"
 
+[Coordinator.Circuit]
+MaxTx = 512
+NLevels = 32
+
 [Coordinator.EthClient]
 CallGasLimit        = 300000
 DeployGasLimit      = 1000000

@@ -1,55 +1,13 @@
 package common
 
 import (
+	"fmt"
 	"math/big"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/hermeznetwork/tracerr"
 )
-
-// RollupVars contain the Rollup smart contract variables
-// type RollupVars struct {
-// 	EthBlockNum    uint64
-// 	ForgeL1Timeout *big.Int
-// 	FeeL1UserTx    *big.Int
-// 	FeeAddToken    *big.Int
-// 	TokensHEZ      eth.Address
-// 	Governance     eth.Address
-// }
-
-// AuctionVars contain the Auction smart contract variables
-// type AuctionVars struct {
-// 	EthBlockNum       uint64
-// 	SlotDeadline      uint
-// 	CloseAuctionSlots uint
-// 	OpenAuctionSlots  uint
-// 	Governance        eth.Address
-// 	MinBidSlots       MinBidSlots
-// 	Outbidding        int
-// 	DonationAddress   eth.Address
-// 	GovernanceAddress eth.Address
-// 	AllocationRatio   AllocationRatio
-// }
-
-// WithdrawDelayerVars contains the Withdrawal Delayer smart contract variables
-// type WithdrawDelayerVars struct {
-// 	HermezRollupAddress        eth.Address
-// 	HermezGovernanceAddress eth.Address
-// 	EmergencyCouncilAddress      eth.Address
-// 	WithdrawalDelay            uint
-// 	EmergencyModeStartingTime  time.Time
-// 	EmergencyModeEnabled       bool
-// }
-
-// MinBidSlots TODO
-// type MinBidSlots [6]uint
-//
-// // AllocationRatio TODO
-// type AllocationRatio struct {
-// 	Donation uint
-// 	Burn     uint
-// 	Forger   uint
-// }
 
 const (
 	// RollupConstMaxFeeIdxCoordinator is the maximum number of tokens the
@@ -144,6 +102,18 @@ Verifiers                   []RollupVerifierStruct `json:"verifiers"`
 	HermezAuctionContract       ethCommon.Address      `json:"hermezAuctionContract"`
 	HermezGovernanceAddress     ethCommon.Address      `json:"hermezGovernanceAddress"`
 	WithdrawDelayerContract     ethCommon.Address      `json:"withdrawDelayerContract"`
+}
+
+// FindVerifierIdx tries to find a matching verifier in the RollupConstants and
+// returns its index
+func (c *RollupConstants) FindVerifierIdx(MaxTx, NLevels int64) (int, error) {
+	for i, verifier := range c.Verifiers {
+		if verifier.MaxTx == MaxTx && verifier.NLevels == NLevels {
+			return i, nil
+		}
+	}
+	return 0, tracerr.Wrap(fmt.Errorf("verifier not found for MaxTx: %v, NLevels: %v",
+		MaxTx, NLevels))
 }
 
 // BucketParams are the parameter variables of each Bucket of Rollup Smart

@@ -176,7 +176,7 @@ // [ 48 bits ] fromIdx // 6 bytes
 // [ 16 bits ] chainId // 2 bytes
 // [ 32 bits ] empty (signatureConstant) // 4 bytes
 // Total bits compressed data:  241 bits // 31 bytes in *big.Int representation
-func (tx L1Tx) TxCompressedData() (*big.Int, error) {
+func (tx L1Tx) TxCompressedData(chainID uint16) (*big.Int, error) {
 	amountFloat16, err := NewFloat16(tx.Amount)
 	if err != nil {
 		return nil, tracerr.Wrap(err)
@@ -196,7 +196,7 @@ if err != nil {
 		return nil, tracerr.Wrap(err)
 	}
 	copy(b[19:25], fromIdxBytes[:])
-	copy(b[25:27], []byte{0, 0}) // TODO this will be generated by the ChainID config parameter
+	binary.BigEndian.PutUint16(b[25:27], chainID)
 	copy(b[27:31], SignatureConstantBytes[:])
 
 	bi := new(big.Int).SetBytes(b[:])

@@ -56,7 +56,8 @@ ToIdx:   3,
 		Amount:  big.NewInt(4),
 		TokenID: 5,
 	}
-	txCompressedData, err := tx.TxCompressedData()
+	chainID := uint16(0)
+	txCompressedData, err := tx.TxCompressedData(chainID)
 	assert.NoError(t, err)
 
 	// test vector value generated from javascript implementation

@@ -68,7 +68,12 @@ BatchBuilder struct {
 		Path string `validate:"required"`
 	} `validate:"required"`
 	ServerProofs []ServerProof `validate:"required"`
-	EthClient    struct {
+	Circuit      struct {
+		// VerifierIdx uint8  `validate:"required"`
+		MaxTx   int64 `validate:"required"`
+		NLevels int64 `validate:"required"`
+	} `validate:"required"`
+	EthClient struct {
 		CallGasLimit        uint64   `validate:"required"`
 		DeployGasLimit      uint64   `validate:"required"`
 		GasPriceDiv         uint64   `validate:"required"`

@@ -32,6 +32,7 @@ ZKInputs              *common.ZKInputs
 	Proof                 *prover.Proof
 	PublicInputs          []*big.Int
 	L1Batch               bool
+	VerifierIdx           uint8
 	L1UserTxsExtra        []common.L1Tx
 	L1CoordTxs            []common.L1Tx
 	L1CoordinatorTxsAuths [][]byte

@@ -50,8 +50,10 @@ // checks of ethereum transactions in the TxManager
 	TxManagerCheckInterval time.Duration
 	// DebugBatchPath if set, specifies the path where batchInfo is stored
 	// in JSON in every step/update of the pipeline
-	DebugBatchPath string
-	Purger         PurgerCfg
+	DebugBatchPath    string
+	Purger            PurgerCfg
+	VerifierIdx       uint8
+	TxProcessorConfig txprocessor.Config
 }
 
 func (c *Config) debugBatchStore(batchInfo *BatchInfo) {
@@ -213,20 +215,6 @@
 func (c *Coordinator) syncStats(ctx context.Context, stats *synchronizer.Stats) error {
 	c.txManager.SetLastBlock(stats.Eth.LastBlock.Num)
 
-	// TMP
-	//nolint:gomnd
-	selectionConfig := &txselector.SelectionConfig{
-		MaxL1UserTxs:        32,
-		MaxL1CoordinatorTxs: 32,
-		TxProcessorConfig: txprocessor.Config{
-			NLevels:  32,
-			MaxFeeTx: 64,
-			MaxTx:    512,
-			MaxL1Tx:  64,
-			ChainID:  uint16(0),
-		},
-	}
-
 	canForge := c.canForge(stats)
 	if c.pipeline == nil {
 		if canForge {
@@ -238,7 +226,7 @@ if c.pipeline, err = c.newPipeline(ctx, stats); err != nil {
 				return tracerr.Wrap(err)
 			}
 			if err := c.pipeline.Start(batchNum, stats.Sync.LastForgeL1TxsNum,
-				stats, &c.vars, selectionConfig); err != nil {
+				stats, &c.vars); err != nil {
 				c.pipeline = nil
 				return tracerr.Wrap(err)
 			}
@@ -689,8 +677,7 @@ }
 
 // Start the forging pipeline
 func (p *Pipeline) Start(batchNum common.BatchNum, lastForgeL1TxsNum int64,
-	syncStats *synchronizer.Stats, initSCVars *synchronizer.SCVariables,
-	selectionConfig *txselector.SelectionConfig) error {
+	syncStats *synchronizer.Stats, initSCVars *synchronizer.SCVariables) error {
 	if p.started {
 		log.Fatal("Pipeline already started")
 	}
@@ -716,7 +703,7 @@ case syncStats := <-p.statsCh:
 				p.stats = syncStats
 			default:
 				batchNum = p.batchNum + 1
-				batchInfo, err := p.forgeBatch(p.ctx, batchNum, selectionConfig)
+				batchInfo, err := p.forgeBatch(batchNum)
 				if p.ctx.Err() != nil {
 					continue
 				} else if err != nil {
@@ -818,7 +805,7 @@ return nil
 }
 
 // forgeBatch the next batch.
-func (p *Pipeline) forgeBatch(ctx context.Context, batchNum common.BatchNum, selectionConfig *txselector.SelectionConfig) (*BatchInfo, error) {
+func (p *Pipeline) forgeBatch(batchNum common.BatchNum) (*BatchInfo, error) {
 	// remove transactions from the pool that have been there for too long
 	_, err := p.purger.InvalidateMaybe(p.l2DB, p.txSelector.LocalAccountsDB(),
 		p.stats.Sync.LastBlock.Num, int64(batchNum))
@@ -832,6 +819,11 @@ }
 
 	batchInfo := BatchInfo{BatchNum: batchNum} // to accumulate metadata of the batch
 
+	selectionCfg := &txselector.SelectionConfig{
+		MaxL1UserTxs:      common.RollupConstMaxL1UserTx,
+		TxProcessorConfig: p.cfg.TxProcessorConfig,
+	}
+
 	var poolL2Txs []common.PoolL2Tx
 	// var feesInfo
 	var l1UserTxsExtra, l1CoordTxs []common.L1Tx
@@ -847,16 +839,15 @@ l1UserTxs, err := p.historyDB.GetUnforgedL1UserTxs(p.lastForgeL1TxsNum)
 		if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
-		// TODO once feesInfo is added to method return, add the var
 		coordIdxs, auths, l1UserTxsExtra, l1CoordTxs, poolL2Txs, err =
-			p.txSelector.GetL1L2TxSelection(selectionConfig, batchNum, l1UserTxs)
+			p.txSelector.GetL1L2TxSelection(selectionCfg, batchNum, l1UserTxs)
 		if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
 	} else {
 		// 2b: only L2 txs
 		coordIdxs, auths, l1CoordTxs, poolL2Txs, err =
-			p.txSelector.GetL2TxSelection(selectionConfig, batchNum)
+			p.txSelector.GetL2TxSelection(selectionCfg, batchNum)
 		if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
@@ -864,11 +855,11 @@ l1UserTxsExtra = nil
 	}
 
 	// 3.  Save metadata from TxSelector output for BatchNum
-	// TODO feesInfo
 	batchInfo.L1UserTxsExtra = l1UserTxsExtra
 	batchInfo.L1CoordTxs = l1CoordTxs
 	batchInfo.L1CoordinatorTxsAuths = auths
 	batchInfo.CoordIdxs = coordIdxs
+	batchInfo.VerifierIdx = p.cfg.VerifierIdx
 
 	if err := p.l2DB.StartForging(poolL2TxsIDs(poolL2Txs), batchInfo.BatchNum); err != nil {
 		return nil, tracerr.Wrap(err)
@@ -885,10 +876,11 @@ }
 
 	// 4. Call BatchBuilder with TxSelector output
 	configBatch := &batchbuilder.ConfigBatch{
-		ForgerAddress: p.cfg.ForgerAddress,
+		ForgerAddress:     p.cfg.ForgerAddress,
+		TxProcessorConfig: p.cfg.TxProcessorConfig,
 	}
 	zkInputs, err := p.batchBuilder.BuildBatch(coordIdxs, configBatch, l1UserTxsExtra,
-		l1CoordTxs, poolL2Txs, nil) // TODO []common.TokenID --> feesInfo
+		l1CoordTxs, poolL2Txs, nil)
 	if err != nil {
 		return nil, tracerr.Wrap(err)
 	}
@@ -948,7 +940,7 @@ L1CoordinatorTxsAuths: batchInfo.L1CoordinatorTxsAuths,
 		L2TxsData:             batchInfo.L2Txs,
 		FeeIdxCoordinator:     batchInfo.CoordIdxs,
 		// Circuit selector
-		VerifierIdx: 0, // TODO
+		VerifierIdx: batchInfo.VerifierIdx,
 		L1Batch:     batchInfo.L1Batch,
 		ProofA:      [2]*big.Int{proof.PiA[0], proof.PiA[1]},
 		ProofB: [2][2]*big.Int{

@@ -90,9 +90,7 @@ batchBuilder *batchbuilder.BatchBuilder
 	stateDB      *statedb.StateDB
 }
 
-var maxL1UserTxs uint64 = 128
 var maxL1Txs uint64 = 256
-var maxL1CoordinatorTxs uint64 = maxL1Txs - maxL1UserTxs
 var maxTxs uint64 = 376
 var nLevels uint32 = 32   //nolint:deadcode,unused
 var maxFeeTxs uint32 = 64 //nolint:deadcode,varcheck
@@ -174,7 +172,16 @@ PurgeBlockDelay:      10,
 			InvalidateBatchDelay: 4,
 			InvalidateBlockDelay: 4,
 		},
+		TxProcessorConfig: txprocessor.Config{
+			NLevels:  nLevels,
+			MaxFeeTx: maxFeeTxs,
+			MaxTx:    uint32(maxTxs),
+			MaxL1Tx:  uint32(maxL1Txs),
+			ChainID:  chainID,
+		},
+		VerifierIdx: 0,
 	}
+
 	serverProofs := []prover.Client{
 		&prover.MockClient{Delay: 300 * time.Millisecond},
 		&prover.MockClient{Delay: 400 * time.Millisecond},
@@ -627,24 +634,12 @@ pipeline.batchBuilder.LocalStateDB().MT.Root())
 
 	batchNum++
 
-	selectionConfig := &txselector.SelectionConfig{
-		MaxL1UserTxs:        maxL1UserTxs,
-		MaxL1CoordinatorTxs: maxL1CoordinatorTxs,
-		TxProcessorConfig: txprocessor.Config{
-			NLevels:  nLevels,
-			MaxFeeTx: maxFeeTxs,
-			MaxTx:    uint32(maxTxs),
-			MaxL1Tx:  uint32(maxL1Txs),
-			ChainID:  chainID,
-		},
-	}
-
-	batchInfo, err := pipeline.forgeBatch(ctx, batchNum, selectionConfig)
+	batchInfo, err := pipeline.forgeBatch(batchNum)
 	require.NoError(t, err)
 	assert.Equal(t, 3, len(batchInfo.L2Txs))
 
 	batchNum++
-	batchInfo, err = pipeline.forgeBatch(ctx, batchNum, selectionConfig)
+	batchInfo, err = pipeline.forgeBatch(batchNum)
 	require.NoError(t, err)
 	assert.Equal(t, 0, len(batchInfo.L2Txs))
 }

@@ -28,6 +28,7 @@ "github.com/hermeznetwork/hermez-node/priceupdater"
 	"github.com/hermeznetwork/hermez-node/prover"
 	"github.com/hermeznetwork/hermez-node/synchronizer"
 	"github.com/hermeznetwork/hermez-node/test/debugapi"
+	"github.com/hermeznetwork/hermez-node/txprocessor"
 	"github.com/hermeznetwork/hermez-node/txselector"
 	"github.com/hermeznetwork/tracerr"
 	"github.com/jmoiron/sqlx"
@@ -202,8 +203,8 @@ if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
 		// TODO: Get (configCircuits []ConfigCircuit, batchNum common.BatchNum, nLevels uint64) from smart contract
-		nLevels := uint64(32) //nolint:gomnd
-		batchBuilder, err := batchbuilder.NewBatchBuilder(cfg.Coordinator.BatchBuilder.Path, stateDB, nil, 0, nLevels)
+		batchBuilder, err := batchbuilder.NewBatchBuilder(cfg.Coordinator.BatchBuilder.Path,
+			stateDB, nil, 0, uint64(cfg.Coordinator.Circuit.NLevels))
 		if err != nil {
 			return nil, tracerr.Wrap(err)
 		}
@@ -216,6 +217,22 @@ serverProofs[i] = prover.NewProofServerClient(serverProofCfg.URL,
 				cfg.Coordinator.ProofServerPollInterval.Duration)
 		}
 
+		txProcessorCfg := txprocessor.Config{
+			NLevels:  uint32(cfg.Coordinator.Circuit.NLevels),
+			MaxTx:    uint32(cfg.Coordinator.Circuit.MaxTx),
+			ChainID:  chainIDU16,
+			MaxFeeTx: common.RollupConstMaxFeeIdxCoordinator,
+			MaxL1Tx:  common.RollupConstMaxL1Tx,
+		}
+		verifierIdx, err := scConsts.Rollup.FindVerifierIdx(
+			cfg.Coordinator.Circuit.MaxTx,
+			cfg.Coordinator.Circuit.NLevels,
+		)
+		if err != nil {
+			return nil, tracerr.Wrap(err)
+		}
+		log.Infow("Found verifier that matches circuit config", "verifierIdx", verifierIdx)
+
 		coord, err = coordinator.NewCoordinator(
 			coordinator.Config{
 				ForgerAddress:          cfg.Coordinator.ForgerAddress,
@@ -232,6 +249,8 @@ InvalidateBatchDelay: cfg.Coordinator.L2DB.InvalidateBatchDelay,
 					PurgeBlockDelay:      cfg.Coordinator.L2DB.PurgeBlockDelay,
 					InvalidateBlockDelay: cfg.Coordinator.L2DB.InvalidateBlockDelay,
 				},
+				VerifierIdx:       uint8(verifierIdx),
+				TxProcessorConfig: txProcessorCfg,
 			},
 			historyDB,
 			l2DB,

@@ -65,7 +65,6 @@ p.PiC[2] = (*big.Int)(proof.PiC[2])
 	if p.PiC[2].Int64() != 1 {
 		return tracerr.Wrap(fmt.Errorf("Expected PiC[2] == 1, but got %v", p.PiC[2]))
 	}
-	// TODO: Assert ones and zeroes
 	p.Protocol = proof.Protocol
 	return nil
 }

@@ -441,7 +441,7 @@ // ZKInputs
 	if tp.zki != nil {
 		// Txs
 		var err error
-		tp.zki.TxCompressedData[tp.i], err = tx.TxCompressedData()
+		tp.zki.TxCompressedData[tp.i], err = tx.TxCompressedData(tp.config.ChainID)
 		if err != nil {
 			log.Error(err)
 			return nil, nil, false, nil, tracerr.Wrap(err)