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package rollup
import (
"bytes"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// OVMContext represents the blocknumber and timestamp
// that exist during L2 execution
type OVMContext struct {
blockNumber uint64
timestamp uint64
}
// Backend represents the type of transactions that are being synced.
// The different types have different security models.
type Backend uint
// String implements the Stringer interface
func (s Backend) String() string {
switch s {
case BackendL1:
return "l1"
case BackendL2:
return "l2"
default:
return ""
}
}
// NewBackend creates a Backend from a human readable string
func NewBackend(typ string) (Backend, error) {
switch typ {
case "l1":
return BackendL1, nil
case "l2":
return BackendL2, nil
default:
return 0, fmt.Errorf("Unknown Backend: %s", typ)
}
}
const (
// BackendL1 Backend involves syncing transactions that have been batched to
// Layer One. Once the transactions have been batched to L1, they cannot be
// removed assuming that they are not reorganized out of the chain.
BackendL1 Backend = iota
// BackendL2 Backend involves syncing transactions from the sequencer,
// meaning that the transactions may have not been batched to Layer One yet.
// This gives higher latency access to the sequencer data but no guarantees
// around the transactions as they have not been submitted via a batch to
// L1.
BackendL2
)
func isCtcTxEqual(a, b *types.Transaction) bool {
if a.To() == nil && b.To() != nil {
if !bytes.Equal(b.To().Bytes(), common.Address{}.Bytes()) {
return false
}
}
if a.To() != nil && b.To() == nil {
if !bytes.Equal(a.To().Bytes(), common.Address{}.Bytes()) {
return false
}
return false
}
if a.To() != nil && b.To() != nil {
if !bytes.Equal(a.To().Bytes(), b.To().Bytes()) {
return false
}
}
if !bytes.Equal(a.Data(), b.Data()) {
return false
}
if a.L1MessageSender() == nil && b.L1MessageSender() != nil {
return false
}
if a.L1MessageSender() != nil && b.L1MessageSender() == nil {
return false
}
if a.L1MessageSender() != nil && b.L1MessageSender() != nil {
if !bytes.Equal(a.L1MessageSender().Bytes(), b.L1MessageSender().Bytes()) {
return false
}
}
if a.Gas() != b.Gas() {
return false
}
return true
}