L1 Transaction Hash

[artjoma]

Can somebody advice. Where I can get L1 transaction hash value using internal API?
https://optimistic.etherscan.io/batch/350

tx_resp, err := api.eth.syncService.GetClient().GetRawTransaction(*tx.GetMeta().Index, api.eth.syncService.GetBackend())
blockN := tx_resp.Batch.BlockNumber// return L1 block number
// Where I can found tx hash or transaction position number in L1 block ?

[smartcontracts]

We don't currently expose this inside of L2Geth. You could find the L1 transaction hash for a given batch by finding the corresponding event on L1. It should be a SequencerBatchAppended event.

[artjoma]

@smartcontracts thank you!
Yes I'm using this approach:

var appendSequencerBatchTopic = common.HexToHash("0x127186556e7be68c7e31263195225b4de02820707889540969f62c05cf73525e")
l1Logs, err := l1Client.FilterLogs(ctx, ethereum.FilterQuery{
		FromBlock: big.NewInt(0).SetUint64(l1BlockN),
		ToBlock:   big.NewInt(0).SetUint64(l1BlockN),
		Topics:    [][]common.Hash{{appendSequencerBatchTopic}},
	})
...
L1TxHash:     l1Logs[0].TxHash,

[smartcontracts]

Looks correct to me!