fix(op-e2e): fallback to not use bsc specific method eth_getFinalized…

…Block (#64)

* fix(op-e2e): fallback to not use bsc specific method eth_getFinalizedBlock in e2e-test

* catch error msg: eth_getFinalizedBlock does not exist

op-node/sources/l1_client.go

@@ -76,6 +76,10 @@ func NewL1Client(client client.RPC, log log.Logger, metrics caching.Metrics, con
 // Notice, we cannot cache a block reference by label because labels are not guaranteed to be unique.
 func (s *L1Client) L1BlockRefByLabel(ctx context.Context, label eth.BlockLabel) (eth.L1BlockRef, error) {
 	info, err := s.BSCInfoByLabel(ctx, label)
+	if label == eth.Finalized && err != nil && strings.Contains(err.Error(), "eth_getFinalizedBlock does not exist") {
+		// op-e2e not support bsc as L1 currently, so fallback to not use bsc specific method eth_getFinalizedBlock
+		info, err = s.InfoByLabel(ctx, label)
+	}
 	if err != nil {
 		// Both geth and erigon like to serve non-standard errors for the safe and finalized heads, correct that.
 		// This happens when the chain just started and nothing is marked as safe/finalized yet.