feat: update gas_limit field of ScrollBuilderConfig to a Option<u64> (#300)

* feat: update gas_limit field of ScrollBuilderConfig to a Option<u64>

* cargo update

Author: yiweichi

Cargo.lock

@@ -70,7 +70,7 @@ impl<Txs> ScrollPayloadBuilderBuilder<Txs> {
             evm_config,
             ctx.provider().clone(),
             ScrollBuilderConfig::new(
-                gas_limit,
+                Some(gas_limit),
                 self.payload_building_time_limit,
                 self.block_da_size_limit,
             ),

crates/scroll/node/src/builder/payload.rs

@@ -414,7 +414,10 @@ where
                 ScrollNextBlockEnvAttributes {
                     timestamp: self.attributes().timestamp(),
                     suggested_fee_recipient: self.attributes().suggested_fee_recipient(),
-                    gas_limit: self.attributes().gas_limit.unwrap_or(builder_config.gas_limit),
+                    gas_limit: self
+                        .attributes()
+                        .gas_limit
+                        .unwrap_or_else(|| builder_config.gas_limit.unwrap_or_default()),
                     base_fee,
                 },
             )