add staleness comment

crates/eigenda/src/eigenda.rs

@@ -77,6 +77,9 @@ where
         let stale_gap = 100 as u64;
 
         // check staleness
+        // ToDo this would require the op-rollup to follow the same pattern
+        // but passing blockId to proxy which implement the logic,
+        // see https://github.com/ethereum-optimism/optimism/blob/0bb2ff57c8133f1e3983820c0bf238001eca119b/op-alt-da/damgr.go#L211
         if rbn + stale_gap < l1_block_number {
             // return error
             unimplemented!()