1package batchbuilder
 2
 3import (
 4	"github.com/hermeznetwork/hermez-node/common"
 5	"github.com/hermeznetwork/hermez-node/db/kvdb"
 6	"github.com/hermeznetwork/hermez-node/db/statedb"
 7	"github.com/hermeznetwork/hermez-node/txprocessor"
 8	"github.com/hermeznetwork/tracerr"
 9)
10
11// ConfigCircuit contains the circuit configuration
12type ConfigCircuit struct {
13	TxsMax       uint64
14	L1TxsMax     uint64
15	SMTLevelsMax uint64
16}
17
18// BatchBuilder implements the batch builder type, which contains the
19// functionalities
20type BatchBuilder struct {
21	localStateDB *statedb.LocalStateDB
22}
23
24// ConfigBatch contains the batch configuration
25type ConfigBatch struct {
26	TxProcessorConfig txprocessor.Config
27}
28
29// NewBatchBuilder constructs a new BatchBuilder, and executes the bb.Reset
30// method
31func NewBatchBuilder(dbpath string, synchronizerStateDB *statedb.StateDB, batchNum common.BatchNum, nLevels uint64) (*BatchBuilder, error) {
32	localStateDB, err := statedb.NewLocalStateDB(
33		statedb.Config{
34			Path:    dbpath,
35			Keep:    kvdb.DefaultKeep,
36			Type:    statedb.TypeBatchBuilder,
37			NLevels: int(nLevels),
38		},
39		synchronizerStateDB)
40	if err != nil {
41		return nil, tracerr.Wrap(err)
42	}
43
44	bb := BatchBuilder{
45		localStateDB: localStateDB,
46	}
47
48	err = bb.Reset(batchNum, true)
49	return &bb, tracerr.Wrap(err)
50}
51
52// Reset tells the BatchBuilder to reset it's internal state to the required
53// `batchNum`.  If `fromSynchronizer` is true, the BatchBuilder must take a
54// copy of the rollup state from the Synchronizer at that `batchNum`, otherwise
55// it can just roll back the internal copy.
56func (bb *BatchBuilder) Reset(batchNum common.BatchNum, fromSynchronizer bool) error {
57	return tracerr.Wrap(bb.localStateDB.Reset(batchNum, fromSynchronizer))
58}
59
60// BuildBatch takes the transactions and returns the common.ZKInputs of the next batch
61func (bb *BatchBuilder) BuildBatch(coordIdxs []common.Idx, configBatch *ConfigBatch, l1usertxs,
62	l1coordinatortxs []common.L1Tx, pooll2txs []common.PoolL2Tx) (*common.ZKInputs, error) {
63	bbStateDB := bb.localStateDB.StateDB
64	tp := txprocessor.NewTxProcessor(bbStateDB, configBatch.TxProcessorConfig)
65
66	ptOut, err := tp.ProcessTxs(coordIdxs, l1usertxs, l1coordinatortxs, pooll2txs)
67	return ptOut.ZKInputs, tracerr.Wrap(err)
68}
69
70// LocalStateDB returns the underlying LocalStateDB
71func (bb *BatchBuilder) LocalStateDB() *statedb.LocalStateDB {
72	return bb.localStateDB
73}