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package derive
import (
"context"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/log"
altda "github.com/ethereum-optimism/optimism/op-alt-da"
"github.com/ethereum-optimism/optimism/op-node/rollup"
"github.com/ethereum-optimism/optimism/op-service/eth"
)
type DataIter interface {
Next(ctx context.Context) (eth.Data, error)
}
type L1TransactionFetcher interface {
InfoAndTxsByHash(ctx context.Context, hash common.Hash) (eth.BlockInfo, types.Transactions, error)
}
type L1BlobsFetcher interface {
// GetBlobs fetches blobs that were confirmed in the given L1 block with the given indexed hashes.
GetBlobs(ctx context.Context, ref eth.L1BlockRef, hashes []eth.IndexedBlobHash) ([]*eth.Blob, error)
}
type AltDAInputFetcher interface {
// GetInput fetches the input for the given commitment at the given block number from the DA storage service.
GetInput(ctx context.Context, l1 altda.L1Fetcher, c altda.CommitmentData, blockId eth.L1BlockRef) (eth.Data, error)
// AdvanceL1Origin advances the L1 origin to the given block number, syncing the DA challenge events.
AdvanceL1Origin(ctx context.Context, l1 altda.L1Fetcher, blockId eth.BlockID) error
// Reset the challenge origin in case of L1 reorg
Reset(ctx context.Context, base eth.L1BlockRef, baseCfg eth.SystemConfig) error
}
// DataSourceFactory reads raw transactions from a given block & then filters for
// batch submitter transactions.
// This is not a stage in the pipeline, but a wrapper for another stage in the pipeline
type DataSourceFactory struct {
log log.Logger
dsCfg DataSourceConfig
fetcher L1Fetcher
blobsFetcher L1BlobsFetcher
altDAFetcher AltDAInputFetcher
ecotoneTime *uint64
}
func NewDataSourceFactory(log log.Logger, cfg *rollup.Config, fetcher L1Fetcher, blobsFetcher L1BlobsFetcher, altDAFetcher AltDAInputFetcher) *DataSourceFactory {
config := DataSourceConfig{
l1Signer: cfg.L1Signer(),
batchInboxAddress: cfg.BatchInboxAddress,
altDAEnabled: cfg.AltDAEnabled(),
}
return &DataSourceFactory{
log: log,
dsCfg: config,
fetcher: fetcher,
blobsFetcher: blobsFetcher,
altDAFetcher: altDAFetcher,
ecotoneTime: cfg.EcotoneTime,
}
}
// OpenData returns the appropriate data source for the L1 block `ref`.
func (ds *DataSourceFactory) OpenData(ctx context.Context, ref eth.L1BlockRef, batcherAddr common.Address) (DataIter, error) {
// Creates a data iterator from blob or calldata source so we can forward it to the altDA source
// if enabled as it still requires an L1 data source for fetching input commmitments.
var src DataIter
if ds.ecotoneTime != nil && ref.Time >= *ds.ecotoneTime {
if ds.blobsFetcher == nil {
return nil, fmt.Errorf("ecotone upgrade active but beacon endpoint not configured")
}
src = NewBlobDataSource(ctx, ds.log, ds.dsCfg, ds.fetcher, ds.blobsFetcher, ref, batcherAddr)
} else {
src = NewCalldataSource(ctx, ds.log, ds.dsCfg, ds.fetcher, ref, batcherAddr)
}
if ds.dsCfg.altDAEnabled {
// altDA([calldata | blobdata](l1Ref)) -> data
return NewAltDADataSource(ds.log, src, ds.fetcher, ds.altDAFetcher, ref), nil
}
return src, nil
}
// DataSourceConfig regroups the mandatory rollup.Config fields needed for DataFromEVMTransactions.
type DataSourceConfig struct {
l1Signer types.Signer
batchInboxAddress common.Address
altDAEnabled bool
}
// isValidBatchTx returns true if:
// 1. the transaction has a To() address that matches the batch inbox address, and
// 2. the transaction has a valid signature from the batcher address
func isValidBatchTx(tx *types.Transaction, l1Signer types.Signer, batchInboxAddr, batcherAddr common.Address, logger log.Logger) bool {
to := tx.To()
if to == nil || *to != batchInboxAddr {
return false
}
seqDataSubmitter, err := l1Signer.Sender(tx) // optimization: only derive sender if To is correct
if err != nil {
logger.Warn("tx in inbox with invalid signature", "hash", tx.Hash(), "err", err)
return false
}
// some random L1 user might have sent a transaction to our batch inbox, ignore them
if seqDataSubmitter != batcherAddr {
logger.Warn("tx in inbox with unauthorized submitter", "addr", seqDataSubmitter, "hash", tx.Hash(), "err", err)
return false
}
return true
}