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package common
import (
"encoding/binary"
"fmt"
"math/big"
ethCommon "github.com/ethereum/go-ethereum/common"
"github.com/hermeznetwork/tracerr"
)
const batchNumBytesLen = 8
// Batch is a struct that represents Hermez network batch
type Batch struct {
BatchNum BatchNum `meddler:"batch_num"`
// Ethereum block in which the batch is forged
EthBlockNum int64 `meddler:"eth_block_num"`
ForgerAddr ethCommon.Address `meddler:"forger_addr"`
CollectedFees map[TokenID]*big.Int `meddler:"fees_collected,json"`
FeeIdxsCoordinator []Idx `meddler:"fee_idxs_coordinator,json"`
StateRoot *big.Int `meddler:"state_root,bigint"`
NumAccounts int `meddler:"num_accounts"`
LastIdx int64 `meddler:"last_idx"`
ExitRoot *big.Int `meddler:"exit_root,bigint"`
// ForgeL1TxsNum is optional, Only when the batch forges L1 txs. Identifier that corresponds
// to the group of L1 txs forged in the current batch.
ForgeL1TxsNum *int64 `meddler:"forge_l1_txs_num"`
SlotNum int64 `meddler:"slot_num"` // Slot in which the batch is forged
TotalFeesUSD *float64 `meddler:"total_fees_usd"`
}
// NewEmptyBatch creates a new empty batch
func NewEmptyBatch() *Batch {
return &Batch{
BatchNum: 0,
EthBlockNum: 0,
ForgerAddr: ethCommon.Address{},
CollectedFees: make(map[TokenID]*big.Int),
FeeIdxsCoordinator: make([]Idx, 0),
StateRoot: big.NewInt(0),
NumAccounts: 0,
LastIdx: 0,
ExitRoot: big.NewInt(0),
ForgeL1TxsNum: nil,
SlotNum: 0,
TotalFeesUSD: nil,
}
}
// BatchNum identifies a batch
type BatchNum int64
// Bytes returns a byte array of length 4 representing the BatchNum
func (bn BatchNum) Bytes() []byte {
var batchNumBytes [batchNumBytesLen]byte
binary.BigEndian.PutUint64(batchNumBytes[:], uint64(bn))
return batchNumBytes[:]
}
// BigInt returns a *big.Int representing the BatchNum
func (bn BatchNum) BigInt() *big.Int {
return big.NewInt(int64(bn))
}
// BatchNumFromBytes returns BatchNum from a []byte
func BatchNumFromBytes(b []byte) (BatchNum, error) {
if len(b) != batchNumBytesLen {
return 0,
tracerr.Wrap(fmt.Errorf("can not parse BatchNumFromBytes, bytes len %d, expected %d",
len(b), batchNumBytesLen))
}
batchNum := binary.BigEndian.Uint64(b[:batchNumBytesLen])
return BatchNum(batchNum), nil
}
// BatchData contains the information of a Batch
type BatchData struct {
L1Batch bool // TODO: Remove once Batch.ForgeL1TxsNum is a pointer
// L1UserTxs that were forged in the batch
L1UserTxs []L1Tx
L1CoordinatorTxs []L1Tx
L2Txs []L2Tx
CreatedAccounts []Account
UpdatedAccounts []AccountUpdate
ExitTree []ExitInfo
Batch Batch
}
// NewBatchData creates an empty BatchData with the slices initialized.
func NewBatchData() *BatchData {
return &BatchData{
L1Batch: false,
// L1UserTxs: make([]common.L1Tx, 0),
L1CoordinatorTxs: make([]L1Tx, 0),
L2Txs: make([]L2Tx, 0),
CreatedAccounts: make([]Account, 0),
ExitTree: make([]ExitInfo, 0),
Batch: Batch{},
}
}