block_producer.rs comment

crates/block-producer/src/block_producer.rs

@@ -257,6 +257,10 @@ impl BlockProducer {
         // header_deps, used for obtaining l1 time in the state-validator-script
         let block_number = block.raw().number().unpack();
         if 2 <= rollup_context.determine_global_state_version(block_number) {
+            // Recover the l1_confirmed_header based on l1_confimed_timestamp.
+            // The l1_confirmed_header is referenced when producing l2block and GlobalState.
+            //
+            // The block producer would reference confirmed headers to avoid L1 reorg issue.
             let finality_as_duration = rollup_context.rollup_config.finality_as_duration();
             let last_finalized_timestamp = match Timepoint::from_full_value(
                 global_state.last_finalized_block_number().unpack(),
@@ -277,6 +281,7 @@ impl BlockProducer {
                             l1_confirmed_timestamp, block_number
                         )
                     });
+
             tx_skeleton
                 .header_deps_mut()
                 .push(ckb_types::prelude::Unpack::unpack(&l1_confirmed_header.hash()).pack());