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package common
import (
"encoding/binary"
"fmt"
"math/big"
ethCommon "github.com/ethereum/go-ethereum/common"
)
const batchNumBytesLen = 8
// Batch is a struct that represents Hermez network batch
type Batch struct {
BatchNum BatchNum `meddler:"batch_num"`
EthBlockNum int64 `meddler:"eth_block_num"` // Ethereum block in which the batch is forged
ForgerAddr ethCommon.Address `meddler:"forger_addr"`
CollectedFees map[TokenID]*big.Int `meddler:"fees_collected,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 *int64 `meddler:"forge_l1_txs_num"` // optional, Only when the batch forges L1 txs. Identifier that corresponds to the group of L1 txs forged in the current batch.
SlotNum int64 `meddler:"slot_num"` // Slot in which the batch is forged
TotalFeesUSD *float64 `meddler:"total_fees_usd"`
}
// 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[:]
}
// BatchNumFromBytes returns BatchNum from a []byte
func BatchNumFromBytes(b []byte) (BatchNum, error) {
if len(b) != batchNumBytesLen {
return 0, fmt.Errorf("can not parse BatchNumFromBytes, bytes len %d, expected %d", len(b), batchNumBytesLen)
}
batchNum := binary.BigEndian.Uint64(b[:batchNumBytesLen])
return BatchNum(batchNum), nil
}